Abdelaziz Gouda

Abdelaziz Gouda

Ain Shams University

H-index: 8

Africa-Egypt

Abdelaziz Gouda Information

University

Ain Shams University

Position

Assistant lecturer at Physics department

Citations(all)

307

Citations(since 2020)

258

Cited By

126

hIndex(all)

8

hIndex(since 2020)

8

i10Index(all)

8

i10Index(since 2020)

8

Email

University Profile Page

Ain Shams University

Abdelaziz Gouda Skills & Research Interests

Nanomaterials

Solar Energy Conversion

Electrochemical Energy Storage

Photocatalysis

CO2 Conversion

Top articles of Abdelaziz Gouda

In situ probes into the structural changes and active state evolution of a highly selective iron-based CO2 reduction photocatalyst

Harnessing solar energy for CO2 conversion to fuels presents a sustainable alternative to fossil fuels. However, finding an economical, stable, non-toxic nanomaterial catalyst poses a significant challenge. Understanding the catalyst's active state is vital for optimal performance due to potential structural changes during reactions. Herein, we employ various in situ characterizations to detail δ-FeOOH's structural evolution during hydrogen activation, identifying its active phase while catalyzing the heterogeneous reduction of CO2 by H2. Using in situ environmental transmission electron microscopy, δ-FeOOH is first dehydrated to α-Fe2O3, then reduced to Fe3O4, and finally to α-Fe. Other in situ characterizations revealed that the active state of the catalyst (Fe-350-H2) is a mixture of Fe3O4 and α-Fe. A detailed investigation into the photocatalytic CO2 reduction using batch, flow, and LED reactors unveiled that the Fe …

Authors

Feysal M Ali,Abdelaziz Gouda,Paul N Duchesne,Mohamad Hmadeh,Paul G O’Brien,Abhinav Mohan,Mireille Ghoussoub,Athanasios A Tountas,Hussameldin Ibrahim,Doug D Perovic,Geoffrey A Ozin

Journal

Chem Catalysis

Published Date

2024/4/22

Defect-Rich Metal–Organic Framework Nanocrystals for Removal of Micropollutants from Water

In this study, the effective removal of three major micropollutants (e.g., propranolol hydrochloride, 1-naphthylamine, and 2-naphthol) from water is investigated using defected UiO-66 and functionalized derivatives as adsorbents. The defects in UiO-66 are induced using two distinct strategies. The first one involves a process of selectively thermolyzing labile linkers, leading to the creation of a hierarchical mesoporous framework (HP-UiO-66). The second technique employs monocarboxylic acid modulator, such as acetic acid (AA) or trifluoroacetic acid (TFA), which is coordinated with the Zr-clusters during synthesis and removed upon activation, resulting in the creation of defective UiO-66 structures. The influence they have on structural features of metal–organic framework (MOF) nanocrystals is compared to the ideal nonmodulated UiO-66 MOF. The samples are fully characterized by powder X-ray diffraction (PXRD …

Authors

Ola Haidar,Thibault Roques-Carmes,Abdelaziz Gouda,Nabil Tabaja,Joumana Toufaily,Mohamad Hmadeh

Journal

ACS Applied Nano Materials

Published Date

2024/4/21

Leave No Photon Behind: Artificial Intelligence in Multiscale Physics of Photocatalyst and Photoreactor Design

Although solar fuels photocatalysis offers the promise of converting carbon dioxide directly with sunlight as commercially scalable solutions have remained elusive over the past few decades, despite significant advancements in photocatalysis band‐gap engineering and atomic site activity. The primary challenge lies not in the discovery of new catalyst materials, which are abundant, but in overcoming the bottlenecks related to material‐photoreactor synergy. These factors include achieving photogeneration and charge‐carrier recombination at reactive sites, utilizing high mass transfer efficiency supports, maximizing solar collection, and achieving uniform light distribution within a reactor. Addressing this multi‐dimensional problem necessitates harnessing machine learning techniques to analyze real‐world data from photoreactors and material properties. In this perspective, the challenges are outlined associated …

Authors

Joel Yi Yang Loh,Andrew Wang,Abhinav Mohan,Athanasios A Tountas,Abdelaziz M Gouda,Alexandra Tavasoli,Geoffrey A Ozin

Published Date

2024/3/13

Controlled Growth of Highly Defected Zirconium–Metal–Organic Frameworks via a Reaction–Diffusion System for Water Remediation

The relentless growth of metal–organic framework (MOF) chemistry is paralleled by the persistent urge to control the MOFs physical and chemical properties. While this control is mostly achieved by solvothermal syntheses, room temperature procedures stand out as more convenient and sustainable pathways for the production of MOF materials. Herein, a novel approach to control the crystal size and defect numbers of a dihydroxy-functionalized zirconium-based metal–organic framework (UiO-66(OH)2) at room temperature is reported. Through a reaction–diffusion method in a 1D system, zirconium salt was diffused into an agar gel matrix containing the organic linker to form nanocrystals of UiO-66(OH)2 with tailored structural features that include crystal size distribution, surface area, and defect number. By variation of the synthesis parameters of the system, hierarchical MOF nanocrystals with an average size …

Authors

Patrick Damacet,Karen Hannouche,Abdelaziz Gouda,Mohamad Hmadeh

Published Date

2024/1/17

Advancing Lithium-Sulfur Battery Efficiency: Utilizing a 2D/2D g-C3N4@ MXene Heterostructure to Enhance Sulfur Evolution Reactions and Regulate Polysulfides in Lean Electrolyte …

Lithium–sulfur batteries (LSBs) show promise for achieving a high energy density of 500 Wh/kg, despite challenges such as poor cycle life and low energy efficiency due to sluggish redox kinetics of lithium polysulfides (LiPSs) and sulfur's electronic insulating nature. We present a novel 2D Ti3C2 Mxene on a 2D graphitic carbon nitride (g-C3N4) heterostructure designed to enhance LiPS conversion kinetics and adsorption capacity. In pouch cell configuration with lean electrolyte conditions (~5 µl/mg), the g-C3N4-Mx/S cathode exhibited excellent rate performance, delivering ~1061 mAh/g at C/8 and retaining ~773 mAh/g after 190 cycles with a Coulombic efficiency of 90.4%. The battery maintained a discharge capacity of 680 mAh/g even at 1.25 C. It operated reliably at an elevated sulfur loading of 5.9 mg/cm2, with an initial discharge capacity of ~900 mAh/g and a sustained CE of over 83% throughout 190 cycles …

Authors

Vijay Kumar,Otavio Augusto Titton Dias,Abdelaziz Gouda,Ritu Malik,Mohini M Sain

Journal

Materials Horizons

Published Date

2024

Tannins for Sustainable Semi-solid-state Supercapacitors

Organic redox-active molecules extracted from natural sources (biosourced) are relevant for sustainable storage of renewable, yet intermittent, energy. When deposited on electrode surfaces, redox-active molecules bring about an increase of the energy density of the electrodes since the Faradaic storage mechanism adds to the electrostatic one. The engineering of the electrode surface and the interfaces between the electrode surface with the molecules and the electrolyte is key to optimization of storage. Here, we report on (i) electrodes prepared by depositing onto chemically modified surfaces of carbon paper solutions of the redox-active Catechin (Ctn) molecule, a member of the tannin family, and (ii) its use in symmetric electrochemical capacitors assembled by interfacing them to the polyvinyl alcohol (PVA)-based hydrogel electrolyte. Ctn-based supercapacitors reach capacitance values as high as 202 at 1 Ag−1 …

Authors

M Hoseinizadeh,KE Salem,A Gouda,D Belanger,Clara Santato

Journal

Waste and Biomass Valorization

Published Date

2023/10

Enhanced hybrid photocatalytic dry reforming using a phosphated Ni-CeO2 nanorod heterostructure

Operating the dry reforming reaction photocatalytically presents an opportunity to produce commodity chemicals from two greenhouse gases, carbon dioxide and methane, however, the top-performing photocatalysts presented in the academic literature invariably rely on the use of precious metals. In this work, we demonstrate enhanced photocatalytic dry reforming performance through surface basicity modulation of a Ni-CeO2 photocatalyst by selectively phosphating the surface of the CeO2 nanorod support. An optimum phosphate content is observed, which leads to little photoactivity loss and carbon deposition over a 50-hour reaction period. The enhanced activity is attributed to the Lewis basic properties of the PO43− groups which improve CO2 adsorption and facilitate the formation of small nickel metal clusters on the support surface, as well as the mechanical stability of CePO4. A hybrid photochemical …

Authors

Alexandra Tavasoli,Abdelaziz Gouda,Till Zähringer,Young Feng Li,Humayra Quaid,Camilo J Viasus Perez,Rui Song,Mohini Sain,Geoffrey Ozin

Journal

Nature communications

Published Date

2023/3/15

Carbon photochemistry: towards a solar reverse boudouard refinery

Carbon and carbon dioxide can be concurrently converted using light to carbon monoxide via the reverse-Boudouard reaction. Nevertheless, the reaction's high endothermicity requires the reaction to be conducted at about 900 °C, which presents technical challenges associated with large-scale high-temperature energy-intensive operations. Herein, we demonstrate that the reverse-Boudouard reaction can be made practicable and profitable using sunlight in conjunction with light-emitting diodes, silicon photovoltaics, and lithium-ion batteries under room temperature conditions. The feasibility of this scheme is explored using a comparative technoeconomic analysis (TEA) to establish the viability of the process for converting several forms of carbonaceous waste and greenhouse gas carbon dioxide into a sustainable and value-added C1 feedstock, carbon monoxide.

Authors

Camilo J Viasus Pérez,Juan Manuel Restrepo-Florez,Jessica Ye,Nhat Truong Nguyen,Athanasios A Tountas,Rui Song,Chengliang Mao,Andrew Wang,Abdelaziz Gouda,Samantha Corapi,Shufang Ji,Hamish MacLeod,Jiaze Wu,Alán Aspuru-Guzik,Christos T Maravelias,Geoffrey A Ozin

Journal

Energy & Environmental Science

Published Date

2023

Locating the bandgap edges of eumelanin thin films for applications in organic electronics

BACKGROUND Bio‐sourced (natural) organic materials are often chemically and structurally disordered, such that their structure‐property relationships must be explored using model systems. Eumelanin is an interesting candidate among natural organic materials. RESULTS In this work, the locations of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels of 5,6‐dihydroxyindole (DHI) and 5,6‐dihydroxyindole‐2‐carboxylic acid (DHICA) building blocks (monomers) of the black‐brown biopigment eumelanin, in film form, are studied. The films are fabricated by the spin‐coating technique (i.e., here indicated as DHI‐ and DHICA‐films), which is sometimes followed by ammonia‐induced solid‐state polymerization (i.e., indicated as AISSP‐DHI and AISSP‐DHICA films), as well as by thermal evaporation (i.e., evaporated DHI and DHICA films). From …

Authors

Dieudonné Niyonkuru,Alexandre Carrière,Ryan Ambrose,Abdelaziz Gouda,Manuel Reali,Anthony Camus,Alessandro Pezzella,Ian Hill,Clara Santato

Journal

Journal of Chemical Technology & Biotechnology

Published Date

2022/4

Biodegradability and Compostability Aspects of Organic Electronic Materials and Devices

In this chapter, we propose viable approaches for the end of life of organic electronic devices and their powering elements (supercapacitors). Organic electronics is based on electroactive carbon‐based materials. The scenarios revolve around biodegradability and compostability. In the former case, degradation takes place in natural environments, whereas in the latter case, man‐made scenarios are considered.

Authors

Abdelaziz Gouda,Manuel Reali,Alexandre Masson,Alexandra Zvezdin,Nia Byway,Denis Rho,Clara Santato

Journal

Electronic Waste: Recycling and Reprocessing for a Sustainable Future

Published Date

2022/1/10

Selective Photocatalytic Dehydrogenation of Formic Acid by an In Situ-Restructured Copper-Postmetalated Metal–Organic Framework under Visible Light

Formic acid is considered as one of the most promising liquid organic hydrogen carriers. Its catalytic dehydrogenation process generally suffers from low activity, low reaction selectivity, low stability of the catalysts, and/or the use of noble-metal-based catalysts. Herein we report a highly selective, efficient, and noble-metal-free photocatalyst for the dehydrogenation of formic acid. This catalyst, UiO-66(COOH)2-Cu, is built by postmetalation of a carboxylic-functionalized Zr-MOF with copper. The visible-light-driven photocatalytic dehydrogenation process through the release of hydrogen and carbon dioxide has been monitored in real-time via operando Fourier transform infrared spectroscopy, which revealed almost 100% selectivity with high stability (over 3 days) and a conversion yield exceeding 60% (around 5 mmol·gcat–1·h–1) under ambient conditions. These performance indicators make UiO-66(COOH)2-Cu …

Authors

Houeida Issa Hamoud,Patrick Damacet,Dong Fan,Nisrine Assaad,Oleg I Lebedev,Anna Krystianiak,Abdelaziz Gouda,Olivier Heintz,Marco Daturi,Guillaume Maurin,Mohamad Hmadeh,Mohamad El-Roz

Journal

Journal of the American Chemical Society

Published Date

2022/9/1

Biosourced quinones for high-performance environmentally benign electrochemical capacitors via interface engineering

Biosourced and biodegradable organic electrode materials respond to the need for sustainable storage of renewable energy. Here, we report on electrochemical capacitors based on electrodes made up of quinones, such as Sepia melanin and catechin/tannic acid (Ctn/TA), solution-deposited on carbon paper engineered to create high-performance interfaces. Sepia melanin and Ctn/TA on TCP electrodes exhibit a capacitance as high as 1355 mF cm−2 (452 F g−1) and 898 mF cm−2 (300 F g−1), respectively. Sepia melanin and Ctn/TA symmetric electrochemical capacitors operating in aqueous electrolytes exhibit up to 100% capacitance retention and 100% coulombic efficiency over 50,000 and 10,000 cycles at 150 mA cm−2 (10 A g−1), respectively. Maximum power densities as high as 1274 mW cm−2 (46 kW kg−1) and 727 mW cm−2 (26 kW kg−1) with maximum energy densities of 0.56 mWh …

Authors

Abdelaziz Gouda,Alexandre Masson,Molood Hoseinizadeh,Francesca Soavi,Clara Santato

Journal

Communications Chemistry

Published Date

2022/8/20

Best practices in photoelectrochemistry

The adoption of best practices for the characterization of photoelectrochemical (PEC) materials and devices as well as the presentation of corresponding results is required for meaningful comparison of progress reported in the PEC field by different laboratories around the world and to focus on the most promising materials and devices.

Authors

Abdelaziz Gouda,Tao Liu,Joshua C Byers,Jan Augustynski,Clara Santato

Journal

Journal of Power Sources

Published Date

2021/1

Bio-Inspired Quinone Macromolecules Grafted on O, N, S, P Codoped Carbon Paper for High Energy Density Electrochemical

Growing environmental concerns have spurred investments in intermittent renewable energies and electric vehicles. The parallel boom in portable consumer electronics has placed considerable stress on electrochemical energy storage, creating environmental and availability issues for key inorganic materials. The need to switch to bio-sourced, widely available, organic materials is confronted by the low conductivity and stability of most candidates and the difficulties of creating an efficient, metal-free current collector. In this work, we present an acidic thermal oxidative treatment utilizing carbon paper as an efficient electrode for biosourced organic molecules. Following deposition of bio-sourced materials sepia melanin and catechin (a tannin) with high specific capacitance and energy density showed very promising results for supercapacitors. Up to 228 F/g capacitance, with 100% retention after 5 000 cycles, 100 …

Authors

Abdelaziz Gouda,Alexandre Masson,Clara Santato

Journal

Electrochemical Society Meeting Abstracts 240

Published Date

2021/10/19

3D Network of Sepia Melanin and N‐and, S‐Doped Graphitic Carbon Quantum Dots for Sustainable Electrochemical Capacitors

Organic electrode materials operating in aqueous electrolytes offer the opportunity to avoid toxic, critical, and expensive materials for electrochemical energy storage. When deposited on carbon current collectors, redox active organic materials add faradaic to electrostatic capacitance contribution to the electrodes. Here, a 3D network electrode material is reported upon, based on sepia melanin, a quinone macromolecule, and nitrogen‐ and sulfur‐doped graphitic carbon quantum dots (N,S GCQDs) designed to achieve good electronic conductivity and electrolyte wettability. The effect of various undoped and doped carbon quantum dots is also investigated, synthesized from acetic acid and sucrose instead of graphite, on the electrochemical performance of sepia melanin. Sepia/N,S GCQD shows optimum areal capacitance (≈180 mF cm−2) that is about twice as high as sepia (≈77 mF cm−2) with lower charge …

Authors

Abdelaziz Gouda,John Manioudakis,Rafik Naccache,Francesca Soavi,Clara Santato

Journal

Advanced Sustainable Systems

Published Date

2021/10

Biosourced Quinone-Based Molecular Materials for Electrochemical Energy Storage

The United Nations set that access to clean and affordable energy for all is one of the 17 main sustainable development goals. The ongoing demand for energy due to worldwide population growth and lifestyle changes (from consumer to consumable), along with the depletion of natural resources at an alarming rate and environmental concerns (eg, global warming) are motivating the change from fossil fuels to intermittent renewable sources, such as wind and sun. The intermittency of energy received from the sun, however, highlights the need for efficient energy storage devices. In addition, the increased use of electric vehicles and portable electronic devices as well as the development of the Internet of Things bring to a dramatic increase of waste electrical and electronic equipment (WEEE) and require low cost and sustainable power sources as well. Among electrochemical energy storage devices …

Authors

Abdelaziz Gouda

Published Date

2021

Bio-sourced Eumelanin Pigments: Charge Transport Properties and Beyond

Green electronics recently opened new research avenues to use bio-sourced, biocompatible materials to limit the environmental footprint of electronics 1-3. Within bio-sourced carbon-based materials, eumelanin, a black-brown conjugated biopigment, emerged as an excellent candidate for green electronics.Eumelanin features fascinating properties (eg broadband optical absorption 4, 5, metal-ion chelation 6, mixed ionic/electronic conductivity 7–9) and biocompatibility 1, 10. Its conjugated sp 2 backbone suggests that it would be a naturally occurring semiconductor. The amorphous semiconductor model (ASM) for eumelanin, proposed in the 70s after the observation of an electrical resistive switching of wet melanin pellets 11, has been recently questioned by proposing mixed electronic/protonic and proton membrane models 8, 9, 12.

Authors

Manuel Reali,Abdelaziz Gouda,Clara Santato

Journal

Bulletin of the American Physical Society

Published Date

2020/3/6

Electronic transport in the biopigment sepia melanin

Eumelanin is the most common form of the pigment melanin in the human body, with diverse functions including photoprotection, antioxidant behavior, metal chelation, and free radical scavenging. Melanin also plays a role in melanoma skin cancer and Parkinson’s disease. Sepia melanin is a natural eumelanin extracted from the ink sac of cuttlefish. Eumelanin is an ideal candidate to eco-design technologies based on abundant, biosourced, and biodegradable organic electronic materials to alleviate the environmental footprint of the electronics sector. Herein, the focus is on the reversible electrical resistive switching in dry and wet Sepia eumelanin pellets, pointing to the possibility of predominant electronic transport satisfying conditio sine qua non to develop melanin-based electronic devices. These findings shed light on the possibility to describe the transport physics of dry eumelanin using the amorphous …

Authors

Manuel Reali,Abdelaziz Gouda,Jonathan Bellemare,David Ménard,Jean-Michel Nunzi,Francesca Soavi,Clara Santato

Journal

ACS Applied Bio Materials

Published Date

2020/7/6

Eumelanin electrodes in buffered aqueous media at different pH values

Eumelanin, a quinone-based biomacromolecule, is the most common form of the biopigment melanin in the human body. Eumelanin has attracted great interest due to its physicochemical properties, such as metal-ion chelation, free radical scavenging, hydration-dependent (photo) electrical response and redox activity. Investigating the electron transfer properties of eumelanin is key to exploiting the electrochemical energy storage properties of the pigment. In this work, we investigated the redox behavior of chemically controlled eumelanin in NaCH3COO buffer solutions, at different pH values. For our study we used cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge and discharge. Eumelanin, in combination with aqueous electrolytes, provides an attractive case study for eco-designed storage devices based on abundant and environmentally benign materials and interfaces.

Authors

Abdelaziz Gouda,Francesca Soavi,Clara Santato

Journal

Electrochimica Acta

Published Date

2020/7/1

Bio-Sourced, Potentially Biodegradable Materials for Fast Response Moisture Sensors

Humidity is a very important physical parameter that plays an imperative role in technology and human activity. Researchers are paying more attention to develop moisture-responsive materials with outstanding characteristics such as high sensitivity, wide humidity detection range, fast response and short recovery times to keep pace with the on-going development in technology. Abundant, bio-sourced and biodegradable organic materials, such as melanin, are needed to enable the development of eco-designed technologies that alleviate the environmental footprint of the electronics sector. Melanin is a ubiquitous biomacromolecule with diverse functions including hydration dependent electrical response [1], photoresponse [2], antioxidant [3] , metal chelation [4], and free radical scavenging [5]. Melanin originates from the oxidative polymerization of (5,6)-dihydroxindole (DHI) and (5,6)-dihydroxindole 2-carboxyl …

Authors

Abdelaziz Gouda,Manuel Reali,Clara Santato

Journal

Electrochemical Society Meeting Abstracts 237

Published Date

2020/5/1

Light-enhanced electrochemical energy storage of synthetic melanin on conductive glass substrates

Eumelanin is a redox active, quinone-based biopigment, featuring a broad band absorption in the UV-Vis region. The combination of the redox and optical properties makes eumelanin an interesting candidate to explore light-assisted storage technologies. Electrodes of melanin on indium tin oxide (ITO) current collectors were investigated for their morphological and voltammetric characteristics in aqueous electrolytes. Under solar light, we observed that the capacity and the capacitance of the melanin electrodes significantly increase with respect to the dark conditions (by 63% and 73%, respectively).

Authors

Ri Xu,Abdelaziz Gouda,Maria Federica Caso,Francesca Soavi,Clara Santato

Journal

MRS Advances

Published Date

2020/5

Abdelaziz Gouda FAQs

What is Abdelaziz Gouda's h-index at Ain Shams University?

The h-index of Abdelaziz Gouda has been 8 since 2020 and 8 in total.

What are Abdelaziz Gouda's top articles?

The articles with the titles of

In situ probes into the structural changes and active state evolution of a highly selective iron-based CO2 reduction photocatalyst

Defect-Rich Metal–Organic Framework Nanocrystals for Removal of Micropollutants from Water

Leave No Photon Behind: Artificial Intelligence in Multiscale Physics of Photocatalyst and Photoreactor Design

Controlled Growth of Highly Defected Zirconium–Metal–Organic Frameworks via a Reaction–Diffusion System for Water Remediation

Advancing Lithium-Sulfur Battery Efficiency: Utilizing a 2D/2D g-C3N4@ MXene Heterostructure to Enhance Sulfur Evolution Reactions and Regulate Polysulfides in Lean Electrolyte …

Tannins for Sustainable Semi-solid-state Supercapacitors

Enhanced hybrid photocatalytic dry reforming using a phosphated Ni-CeO2 nanorod heterostructure

Carbon photochemistry: towards a solar reverse boudouard refinery

...

are the top articles of Abdelaziz Gouda at Ain Shams University.

What are Abdelaziz Gouda's research interests?

The research interests of Abdelaziz Gouda are: Nanomaterials, Solar Energy Conversion, Electrochemical Energy Storage, Photocatalysis, CO2 Conversion

What is Abdelaziz Gouda's total number of citations?

Abdelaziz Gouda has 307 citations in total.

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