Article
Engineering, Chemical
Soad Z. Alsheheri, Adel A. Ismail
Summary: CuO/BaSnO3 nanorods with a mesoporous p-n heterojunction structure were synthesized by a hydrothermal method for the visible light-induced desulfurization of thiophene. The optimized CuO/BaSnO3 photocatalyst with 15% CuO content showed a maximal desulfurization rate of around 100% within 60 min. This study provides guidance for the design of efficient p-n heterojunction photocatalysts.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Physical
Omid Amiri, Farshad Beshkar, Sangar S. Ahmed, Bahzad Weso Hamad, Peshawa H. Mahmood, Ahmed Anwar Dezaye
Summary: The hierarchical flower-like Ag/Fe3O4/graphene ternary nanocomposites were successfully prepared and applied as novel nanophotocatalysts for desulfurization of thiophene under visible light illumination, showing excellent desulfurization activity within 2 hours. The photo-oxidation mechanism was explained based on active species trapping experiments, with oxidative h(+) and O·(2)- species identified as the dominant active species.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Omid Amiri, Farshad Beshkar, Sangar S. Ahmed, Peshawa H. Mahmood, Ahmed Anwar Dezaye
Summary: In this study, hierarchical BiOI/BiPO4 nano/microspheres were fabricated using co-precipitation-refluxing method with optimized reaction parameters. The heterojunction BiOI/BiPO4 nanocomposites exhibited superior photocatalytic desulfurization performance compared to single BiOI or BiPO4 structures. The enhanced activity was attributed to strong visible-light absorption, unique hierarchical structures, high specific surface area, and efficient charge separation due to the formed p-n heterojunctions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Wejdan T. Alsaggaf, Soliman I. El-Hout
Summary: A novel method called photocatalytic oxidative desulfurization, which utilizes moderate temperatures and pressures without the use of H2 gas, was used to remove sulfur-containing materials. This study synthesized Barium stannate nanoparticles (BaSnO3 NPs) using a hydrothermal technique and fabricated a PdO/BaSnO3 photocatalyst by adding small amounts of PdO to mesoporous BaSnO3. The developed PdO/BaSnO3 photocatalyst showed complete thiophene photooxidative desulfurization and had excellent recyclability.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Multidisciplinary
Dong-Fei Lu, Shangda Li, Ming-Xue Guan, Yu-Peng Han, Yayong Sun, Xin Wu, Fei Wang, Jian Zhang
Summary: In this study, the first visible-light-active titanium sulfonate metal-organic framework (FIR-138) with 2-fold interpenetrated srs topology was successfully synthesized. FIR-138 exhibited good stability and excellent visible-light absorption performance, and demonstrated outstanding visible-light photocatalytic performance in organic reactions.
ACS MATERIALS LETTERS
(2023)
Article
Materials Science, Ceramics
Majdah R. Alotaibi, Ahmed Shawky, Z. I. Zaki
Summary: The petroleum sector is focusing on developing low-sulfur fuels to meet strict regulatory requirements. This study investigates the photocatalytic desulfurization of thiophene using mesoporous MoS2/ZrO2 nanostructures under visible light. The results show that MoS2/ZrO2 significantly enhances the photocatalytic efficiency compared to pure ZrO2, with the 1.5 wt% MoS2/ZrO2 nanostructured material exhibiting the highest efficiency.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Mahvash Siahmansouri, Mehdi Mousavi-Kamazani
Summary: The synthesis and characterization of hollow flower-like NixZn2-xV2O7/WO4 nanostructures were reported using a simple Pechini sol-gel method to improve desulfurization efficiency of petroleum derivatives. Factors affecting morphology, such as chelating agent, gelling agent, and elements ratio, were investigated to determine optimal conditions. SEM images showed that involvement of all elements Ni, Zn, V, and W resulted in formation of hollow structures with high surface area, leading to over 95% efficiency of photocatalytic oxidative desulfurization after 2.5 hours under visible light. The presence of EDTA reduced efficiency to 23%, indicating superoxide as the most active radical species in the process. Comparisons of different compositions showed varying efficiency, highlighting the impact of both composition and morphology.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Amal Basaleh, M. H. H. Mahmoud
Summary: By dispersing CoAl2O4 nanoparticles on the surface of g-C3N4, a highly efficient photocatalytic hydrogen production composite material was successfully synthesized. Compared to pure CoAl2O4 and g-C3N4, this composite material exhibited higher photocatalytic activity and stability.
Article
Biotechnology & Applied Microbiology
Zsolt Boldogkoi, Zsolt Csabai, Dora Tombacz, Laszlo Janovak, Lilla Balassa, Agota Deak, Peter S. Toth, Csaba Janaky, Erno Duda, Imre Dekany
Summary: The study analyzed photoreactive composite films with antiviral effects upon illumination, showing a drastic decrease in infection capability of a herpesvirus on the photoreactive surface compared to the control surface.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Yanhong Chen, Haiyan An, Shenzhen Chang, Tieqi Xu, Yanqin Li, Qingshan Zhu, Yaohui Huang, Yuting Wei
Summary: In this study, two polyoxometalate-based metalloviologen frameworks were intentionally designed and synthesized for the sulfide-sulfoxide aerobic photo-oxidation. The connection of polyoxometalate to the metalloviologen framework enables efficient electron transfer and oxygen generation to oxidize substrates. These frameworks exhibit outstanding photocatalytic activity in the oxidation of sulfides.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Ting-Ting Zhu, Yu-Tong Tao, Yue Sun, Xue Wang, Xiao-Wen Zhang, Jia-Lu Chai, Jie Han, Xiao-Li Zhao, Xu-Dong Chen
Summary: Four isostructural lanthanide coordination complexes based on 3,7-diamino-9,10-anthraquinone-2,6-disulfonate have been synthesized and shown to exhibit excellent catalytic activity and recyclability. These complexes represent a promising category of heterogeneous photocatalysts for promoting organic transformations efficiently under visible light irradiation.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Green & Sustainable Science & Technology
Satya Prasad Asu, Naveen Kumar Sompalli, Satheesh Kuppusamy, Akhila Maheswari Mohan, Prabhakaran Deivasigamani
Summary: This work presents the synthesis of CaO doped CeO2 nanocomposites using a sonochemical-assisted hydrothermal method. The nanocomposites are dispersed on a 3D network of porous polymer monoliths and show superior photocatalytic activity for the degradation of the antimicrobial drug moxifloxacin under visible-light irradiation. The proposed photocatalyst exhibits excellent porosity, surface area, and efficiency for the real-time dissipation of environmental pollutants.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Engineering, Environmental
Sayed Mukit Hossain, Leonard Tijing, Norihiro Suzuki, Akira Fujishima, Jong-Ho Kim, Ho Kyong Shon
Summary: The study explored the feasibility of preparing TiO2/g-CN heterojunction from Ti-incorporated dried dye wastewater sludge. It found that while a one-step calcination route did not successfully create the desired composites, a two-step calcination route was necessary. The best atmospheric NO removal performance was observed when the precursor mixture contained 70% melamine.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
E. M. N. Thiloka Edirisooriya, Punhasa S. Senanayake, Haoyu B. Wang, Marat R. Talipov, Pei Xu, Huiyao Wang
Summary: Plastics have accumulated in the environment and food chain, causing adverse effects on living organisms and human health. Photo-reforming using catalysts is a promising method to treat plastics and recover energy. TiO2 nanoparticles doped with Au and Pt and ZnO doped with Pt were found to enhance the light utilization efficiency and catalytic activity. Pre-treatment using different KOH concentrations and temperatures effectively degraded PET and increased hydrogen yield. This study demonstrates that photo-reforming is an attractive, low-cost, clean H2 technology for reducing greenhouse gas emissions and removing plastic waste.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Ilnaz Raeisi, Pirouz Derakhshi, Parviz Aberoomsand Azar, Mohammad Saber Tehrani
Summary: This study focused on doping manganese and nickel onto titanium dioxide loaded on multi-walled carbon nanotubes to enhance photoactivity. Response surface methodology and Box-Behnken design were used to evaluate parameters, resulting in high degradation efficiency under optimal conditions and investigating desulfurization of sulfur compounds. The kinetic studies showed the Blanchard model had the best agreement with the experimental data.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(2021)
Article
Environmental Sciences
Ahmed Shawky, Hind Alshaikh
Summary: Metal oxide photocatalysts are efficient and environmentally-friendly tools, but they face challenges in practical applications. In this study, sol-gel synthesis was used to create CFO/ZnO nanoheterojunctions, with the addition of CFO improving the performance of ZnO. The formed nanoheterojunctions exhibited high visible light activity and showed excellent degradation efficiency for ciprofloxacin. This research suggests that nanoheterojunction oxides have great potential for the destruction of pharmaceutical wastes under visible-light illumination.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Chemical
Hind Alshaikh, Ahmed Shawky, L. Selva Roselin
Summary: This study synthesized CuCo2O4/g-C3N4 p-n heterojunctions through templated growth for enhanced visible-light photocatalytic reduction of Hg2+ in wastewater. The results showed that CuCo2O4 nanoparticles were anchored on g-C3N4, and the formed heterojunctions exhibited high specific surface areas and improved visible-light absorption of g-C3N4. By tuning the dosage, the CuCo2O4/g-C3N4 catalyst achieved efficient removal of Hg2+ through visible-light photocatalytic reduction.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Engineering, Chemical
Ahmed Shawky, Soha M. Albukhari
Summary: In this study, heterostructured Ag3VO4/ZnO photocatalysts were synthesized, which enhanced visible-light absorption, reduced bandgap energy, and achieved complete mineralization of the antibiotic wastewater pollutant CPF within 45 minutes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Nanoscience & Nanotechnology
Soad Z. Alsheheri, Ahmed Shawky, Wejdan T. Alsaggaf, Z. Zaki
Summary: The accumulation of Cr(VI) ions can have serious impacts on the environment and human health. This study presents a simple synthesis of ZnSe nanoparticles anchored to TiO2 for visible-light-driven photocatalytic reduction of Cr(VI) ions. The introduction of ZnSe enhances the light absorption and significantly improves the photocatalytic activity, while the nanocomposite exhibits good stability.
Article
Chemistry, Physical
Ahmed Shawky, Soad Z. Alsheheri, Wejdan T. Alsaggaf, L. A. Al-Hajji, Z. I. Zaki
Summary: This study successfully synthesized a triblock copolymer-assisted mesoporous TiO2 and coupled it with RuO2 nanoparticles for visible-light-driven photocatalytic reduction of hexavalent chromium. The RuO2 nanoparticles were uniformly dispersed on the mesostructured anatase TiO2 phase nanoparticles, and achieved efficient photocatalytic activity through optimizing dose and stability.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Physical
Rabie M. Youssef, A. M. S. Salem, Ahmed Shawky, Shaker Ebrahim, Moataz Soliman, Mohamed S. A. Abdel-Mottaleb, Said M. El -Sheikh
Summary: In this study, stable metal-free perovskite solar cells were successfully fabricated using an inorganic SnO2/Quantum dot SnO2 double layer. The addition of QD-SnO2 as an interfacial layer improved the performance of the cells. The optimized devices showed a longer shelf life in humid environments, indicating the potential for large-scale production and commercialization.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Ceramics
Majdah R. Alotaibi, Ahmed Shawky, Z. I. Zaki
Summary: The petroleum sector is focusing on developing low-sulfur fuels to meet strict regulatory requirements. This study investigates the photocatalytic desulfurization of thiophene using mesoporous MoS2/ZrO2 nanostructures under visible light. The results show that MoS2/ZrO2 significantly enhances the photocatalytic efficiency compared to pure ZrO2, with the 1.5 wt% MoS2/ZrO2 nanostructured material exhibiting the highest efficiency.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
A. S. Basaleh, Ahmed Shawky, M. H. H. Mahmoud
Summary: Recent studies on ceramic oxide-based photocatalysis have gained significant attention for their potential in addressing environmental issues. This study successfully prepared high surface area zirconium oxide supported with cadmium oxide nanoparticles using a polymeric-assisted sol-gel method. The constructed heterostructure exhibited enhanced visible-light absorbance and a reduced bandgap energy, resulting in efficient photocatalytic degradation of Atrazine.
Article
Materials Science, Ceramics
Reda M. El-Shishtawy, Ahmed Shawky, Hajer S. Alorfi, Mahmoud A. Hussein, Reda M. Mohamed
Summary: This work studied the synthesis and improvement of nanostructured Bi2WO6 by modifying the sol-gel process and anchoring silver oxide (Ag2O) support. The addition of 3.0 wt% Ag2O led to improved visible light absorbance and efficient H2 generation under visible-light irradiation. The enhanced H2 evolution was attributed to extended light harvesting and robust charge separation by Ag2O anchoring to Bi2WO6.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
Reda M. El-Shishtawy, Ahmed Shawky, Reda M. Mohamed
Summary: This study presents a simple method for the synthesis of tungsten oxide (WO3) nanocrystals with the assistance of a soft template, followed by the addition of trace amounts of platinum oxide (PtO) nanodots through precipitation. It is found that the addition of PtO can significantly change the optical and semiconductor properties of WO3, reducing the bandgap energy and enhancing its absorption of visible light. The PtO-decorated WO3 shows excellent photoconversion performance in the synthesis of aniline (AN), with high reusability. This study opens the door for further research on metal oxide-based heterostructures for the production of industrial chemicals.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Physical
Mohamed Mokhtar M. Mostafa, Ahmed Shawky, Sharif Fakhruz Zaman, Katabathini Narasimharao, Mohamed Abdel Salam, Abdulmohsen A. Alshehri, Nezar H. Khdary, Sulaiman Al-Faifi, Abhishek Dutta Chowdhury
Summary: Photocatalytic conversion of carbon dioxide (CO2) into methanol (CH3OH) using PdO/GdFeO3 nanocomposites as photocatalysts was investigated. The inclusion of PdO into GdFeO3 enhanced the visible-light absorption and reduced the overall bandgap. The optimized PdO dosage of 1.5% resulted in significantly improved CH3OH production and sustainable recyclability.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Eman S. Alsolami, Ibraheem A. Mkhalid, Ahmed Shawky, Mahmoud A. Hussein
Summary: The study demonstrates the potential of semiconducting nanostructured photocatalysts for the visible light oxidative mineralization of antibiotics, offering a promising approach to prevent antimicrobial resistance. Synthesized through a modified sol-gel process, the two-dimensional CeO2 nanocrystals were combined with nanocrystalline AgVO3 to form a p-n AgVO3/ CeO2 heterojunction. The novel heterojunction photocatalyst achieved rapid photooxidation of ciprofloxacin and showed an excellent sustainable recyclability of 96% after multiple uses.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
Tariq R. Sobahi, Ahmed Shawky
Summary: Barium stannate (BaSnO3) nanostructures were synthesized through supercritical drying of sol-gel-prepared seeds, followed by impregnation of Nickel sulfide nanoparticles (NiS) in BaSnO3 to produce NiS/BaSnO3 nanocomposite photocatalysts. Characterization tools were used to evaluate the formed nanostructures, which showed positive impact of adding NiS in improving light harvesting and suppressing charge recombination. The produced heterostructures were employed for visible light-driven H2 evolution in the water/glycerol system, and the 9.0 wt.% NiS-impregnated BaSnO3 exhibited the lowest predicted bandgap, improved photoactivity, and high surface area.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Environmental
Reda M. Mohamed, Ahmed Shawky
Summary: In this study, silver oxide (Ag2O)-supported tungsten trioxide (WO3) nanorods were synthesized through a solvothermal process using mixed surfactants. The nanocomposites exhibited enhanced visible-light absorption with Ag2O decoration. The surface analysis confirmed the formation of mesostructured nanocomposites with a surface area range of 203-219 m2g-1. The Ag2O-decorated WO3 nanorods demonstrated high photocatalytic activity for CO2 reduction to methanol under visible light illumination.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Nada Y. Tashkandi, Ahmed Shawky
Summary: This study demonstrates the photocatalytic mineralization of atrazine herbicide using sol-gel-prepared CuAl2O4/BaSnO3 nanocomposites. The CuAl2O4/BaSnO3 material exhibits superior performance, attributed to the formation of efficient p-n heterojunctions and improved visible-light absorption efficiency, enabling fast and efficient photocatalytic reactions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
