Article
Chemistry, Inorganic & Nuclear
Wejdan T. Alsaggaf, Ahmed Shawky, M. H. H. Mahmoud
Summary: This study synthesized mesoporous ZnO nanoparticles with a high surface area and an S-type heterojunction by adding CuO through a polymer-assisted sol-gel process. The CuO/ZnO heterojunction showed wider light absorption and a narrower bandgap, and exhibited efficient photocatalytic performance in the reduction of mercury ions in wastewater.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Reda M. Mohamed, Adel A. Ismail
Summary: A Z-scheme mesoporous BiVO4/g-C3N4 nanocomposite heterojunction was synthesized with high surface area and crystallinity for efficient visible light-driven photocatalysis of Hg(II) ions. The nanocomposite showed enhanced photoreduction efficiency compared to pristine materials, with the 1.2% BiVO4/g-C3N4 nanocomposite achieving the highest performance. This enhancement was attributed to reduced carrier recombination and improved utilization of visible light, as confirmed by various analyses.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Amal S. Basaleh, Z. I. Zaki
Summary: This study successfully utilized MnCo3O4-ZnO heterojunctions to accelerate the conversion of Cr6+ ions to Cr3+ under visible illumination, demonstrating promising photocatalytic performance for heavy metal ion elimination.
Article
Green & Sustainable Science & Technology
Wen-Qiang Li, Yi-Xuan Wang, Yuan-Ming Li, Chuan-Shu He, Bo Lai, Fei Chen, Hui-Juan Wang, Xiao-Guo Zhou, Yang Mu
Summary: This study demonstrates that the photoreduction of hexavalent chromium using iron-based metal organic framework can be enhanced through doping molybdenum disulfide. By relieving recombination process, reducing electron transfer resistance, and regulating charge distribution, the photocatalytic efficiency was significantly improved, showcasing the important role of heterojunction for environmental functional photocatalysts based on iron-based metal organic frameworks.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Ceramics
Maha Alhaddad, Adel A. Ismail
Summary: An affordable and novel approach to design Bi2O3-sensitized hierarchically mesoporous ZnO nanoparticles for Hg(II) reduction under visible light exposure has been achieved. The mesoporous 3% Bi2O3/ZnO heterostructure demonstrated the best photocatalytic efficiency for Hg(II) reduction, outperforming TiO2-P25 and ZnO NPs in terms of photoreduction rate and rate constant. The superior performance is attributed to the synergistic effect, visible-light harvest, large surface area, pore volume, and heterojunction design between Bi2O3 and ZnO, leading to efficient charge carrier separation and reduced recombination rate. Proposed mechanisms and kinetics for the photocatalytic reduction of Hg(II) are also discussed.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Maomao Ni, Yijia Zhu, Changfa Guo, De-Li Chen, Jiqiang Ning, Yijun Zhong, Yong Hu
Summary: A study on the influence of vacancies on the selectivity of photocatalysis reveals that only VO2 vacancies can promote methanation and possess self-regeneration ability. Nickel atoms are also found to play a critical role in the reaction. The optimized photocatalyst shows high C1 compound formation rate and methane selectivity.
Article
Chemistry, Physical
Maomao Ni, Yijia Zhu, Changfa Guo, De-Li Chen, Jiqiang Ning, Yijun Zhong, Yong Hu
Summary: A comprehensive study investigated the role of vacancies in a Co3O4/NiCo2O4 hetero-nanocage for visible-light-driven CO2 methanation. The study found that VO2 vacancies in NiCo2O4 facilitate the methanation process and possess self-regeneration behavior. Additionally, Ni atoms upshift the d-band center of Co, reducing the energy barrier and leading to the formation of CH4 as the main product.
Article
Engineering, Chemical
Mohammad W. Kadi, Soliman I. El-Hout, Ahmed Shawky, Reda M. Mohamed
Summary: The mesoporous LaFeO3/ZnO nanocomposites prepared via the Sol-gel technique exhibited excellent photoreduction ability towards mercury ions under visible light illumination, with significant enhancement compared to pure ZnO. The outstanding performance of the composite is mainly attributed to enhanced visible light absorption, effective charge separation, large surface area, and unique mesoporous structure.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Physical
Ivan Grigioni, Annalisa Polo, Maria Vittoria Dozzi, Kevin G. Stamplecoskie, Danilo H. Jara, Prashant Kamat, Elena Selli
Summary: Photoelectrochemical water splitting is a technology that converts solar energy into oxygen and hydrogen. Research on WO3/BiVO4 heterojunction photoanodes shows that sensitizing WO3 with a BiVO4 layer can improve the efficiency of photo current.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Environmental
Zeyu Duan, Xiaojun Zhao, Limiao Chen
Summary: A novel Z-scheme BiVO4/Cu0.4V2O5 heterojunction photocatalyst was successfully prepared, showing significantly enhanced photocatalytic performance for CO2 reduction under visible-light irradiation, mainly attributed to the superior charge-transport property derived from the Z-scheme structure.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Neha Nandal, Nilesh R. Manwar, B. Moses Abraham, Praveen K. Khatri, Suman L. Jain
Summary: This study presents the development of an efficient photoelectrode material for the photoelectrochemical CO2 reduction reaction (PEC CO2RR). The hybrid CoPcS/GO-COOH system shows higher photocurrent density and increased charge carriers compared to pristine CoPcS and GO-COOH. The results are supported by theoretical calculations, which indicate the high PEC conversion of the hybrid system.
Article
Engineering, Environmental
Benyin Zhang, Hao Xu, Mingming Wang, Luhan Su, Caobin Wu, Qingguo Wang
Summary: In this study, a stable material, BiBDC/BiVO4 heterojunction, was constructed by using a hydrothermal method to efficiently remove organic pollutants from water under visible light irradiation. The improved performance is attributed to the broadened optical absorption range and accelerated separation of photogenerated electrons and holes by the heterojunction. BiBDC/BiVO4 also showed excellent reusability and stability, making it a potential candidate for practical application.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Qinghan Li, Ming Wang, Jinyun He, Yanwu Wang
Summary: A well-integrated BiVO4/BiOCl heterojunction was synthesized using a two-step solvothermal method, showing enhanced photocatalytic performance compared to pure BiOCl.
Article
Engineering, Chemical
Ibraheem A. Mkhalid, Soliman I. El-Hout
Summary: In this study, an unpretentious hydrothermal technique was used to synthesize barium stannate nanocrystals (BSO) and modify them with different doses (3-12 wt.%) of AgVO3 (AVO). The AVO loading significantly improved the structural, optical, and photocatalytic properties of the BSO photocatalysts. The addition of 9.0 wt% AVO reduced the bandgap of BSO from 2.94 to 2.39 eV and enhanced its visible light absorption. The AVO/BSO nanocomposite exhibited excellent photoreduction of Hg2+ ions under visible light illumination.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Environmental Sciences
Suyue Luo, Shaopeng Li, Shuo Zhang, Zhuoying Cheng, Tat Thang Nguyen, Minghui Guo
Summary: In this study, a Z-scheme heterojunction photocatalyst was prepared for the simultaneous photocatalytic reduction of hexavalent chromium and the degradation of rhodamine B, showing superior removal performance. The biochar bridge and charge-transfer channel between two semiconductors enabled fast photogenerated charge separation and powerful redox ability, providing new insights into boosting multicomponent photocatalytic reactions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Materials Science, Multidisciplinary
A. Baoum, M. S. Amin
Summary: The disposal of waste and hazardous compounds is a significant research topic. In this study, a photocatalyst was used to effectively decompose tetracycline antibiotics. The results showed that the prepared nanocomposite exhibited improved photocatalytic characteristics and great stability, making it suitable for various industrial applications.
Article
Materials Science, Multidisciplinary
Ahmed Shawky, Nadiyah Alahmadi, R. M. Mohamed, Z. Zaki
Summary: This study demonstrates the construction of nanostructured Bi2S3/TiO2 as a visible-light active photocatalyst for the rapid reduction of Cr(VI) to Cr(III). The developed photocatalyst achieved a fast photocatalytic reduction of Cr(VI) at 284.2 μmol min(-1) within just 30 min at a dose of 2.0 g/L.
Article
Engineering, Chemical
M. H. El-Sadek, M. M. Farahat, H. H. Ali, Z. Zaki
Summary: This study presents a novel synthesis method for SrTiO3 using mechanical activation-assisted solid-state reaction. The mechanical activation enhances the chemical reactivity of SrSO4 and TiO2, enabling the synthesis of SrTiO3 at a high yield. The synthesized SrTiO3 exhibits a small crystallite size and cubic-like particle morphology.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ahmed Shawky, R. M. Mohamed, Nadiyah Alahmadi, Z. I. Zaki
Summary: This study demonstrates the fabrication of visible-light active nanocomposites composed of two-dimensional (2D) MoS2 decorating mesoporous TiO2 as an efficient material for the complete photoreduction of Hexavalent chromium ions Cr(VI) to less toxic trivalent state (Cr(III)). The MoS2 supported TiO2 photocatalysts have the potential for future research in the removal of highly toxic heavy metals by photoreduction under visible light.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Electrochemistry
A. F. Shoair, Mai M. A. H. Shanab, M. H. H. Mahmoud, Z. Zaki, H. M. Abdel-Ghafar, M. M. Motawea
Summary: The inhibitory effect of using avocado extract on the corrosion of stainless steel in hydrochloric acid has been studied. The concentration of avocado extract has a positive correlation with its adsorption on the steel surface, leading to a decrease in corrosion rate. Various inspection methods have shown consistent results.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(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
Materials Science, Multidisciplinary
M. S. Amin, F. M. Alshareef, Wejdan T. Alsaggaf, Z. Zaki
Summary: Pluronic P-65 was used as a structure-directing agent to create mesoporous Mn3O4-ZnO nanostructured materials. The resulting materials exhibited a large surface area and pore volume. Under visible illumination, the Mn3O4-ZnO heterojunction with 3.0 wt% Mn3O4 NPs showed significantly higher photocatalytic effectiveness for tetracycline degradation compared to pure ZnO NPs and commercial P-25. The removal effectiveness of this heterojunction was 27 and 11-fold stronger than those of pure ZnO NPs and P-25, respectively. The performance of the 3 wt% Mn3O4-ZnO nanostructured material was also superior to other manufactured nanostructured heterojunctions.
Article
Chemistry, Physical
Zaki I. Zaki, Saad H. Alotaibi, Bashayer A. Alhejji, Naser Y. Mostafa, Mohammed A. Amin, Mohsen M. Qhatani
Summary: In this study, a high-density ZrN/ZrSi2 composite with ZrO2 as an inert phase was synthesized using combustion-synthesis methodology accompanied by compaction. The addition of 20 wt% ZrO2 improved the hardness and reduced the porosity of the samples. The sample porosity was reduced to 1.66 vol%, and the sample hardness was improved to 1165 +/- 40.5 HV at 234 MPa.
Article
Electrochemistry
Q. Mohsen, Wael S. Al-Gethami, Z. Zaki, S. H. Alotaibi, Mohamed M. Ibrahim, Mohamed Ezzat, Mohammed A. Amin, M. M. Kamel, Nasser Y. Mostafa
Summary: The effect of pH on the phase and microstructure of ZrO2 generated under hydrothermal processing was investigated. The results showed that at low and high pHs, single phase ZrO2 was obtained, while at intermediate pHs, a biphasic mixture of tetragonal and monoclinic ZrO2 was formed. Monoclinic ZrO2 exhibited intense surface hydroxyl functional groups, enhancing its electrocatalytic activity.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
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
Materials Science, Multidisciplinary
Amal S. Basaleh, Z. I. Zaki
Summary: This study successfully utilized MnCo3O4-ZnO heterojunctions to accelerate the conversion of Cr6+ ions to Cr3+ under visible illumination, demonstrating promising photocatalytic performance for heavy metal ion elimination.
Article
Construction & Building Technology
M. Ramadan, A. O. Habib, M. M. Hazem, M. S. Amin, Alaa Mohsen
Summary: This study proposed a novel hydrothermal technology for the solidification/stabilization of lead and cerium present in a sludge resulting from the glass polishing process. The impact of sludge incorporation and different curing regimes on the mechanical and textural characteristics were investigated. The efficiency of the immobilization process was examined, and it was found that the hydrothermal treatment technology has proven its worth in immobilizing heavy metals in geopolymeric materials.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
A. A. Baoum, M. S. Amin
Summary: In this study, mesoporous Ag2O nanoparticles with a mean particle size of 20 nm were successfully prepared using a triblock copolymer F127. These Ag2O nanoparticles were then combined with different amounts of Ag2S to form Ag2S/Ag2O heterojunctions with superior visible light photocatalytic activity. The photocatalytic degradation of tetracycline was significantly enhanced by the mesoporous Ag2S/Ag2O nanocomposite, which showed a maximum photocatalytic effectiveness of 100% within 90 minutes of visible light illumination.
Correction
Chemistry, Physical
Mohsen Al-Qhtani, Ghulam M. Mustafa, Nasheeta Mazhar, Sonia Bouzgarrou, Qasim Mahmood, Abeer Mera, Zaki I. Zaki, Nasser Y. Mostafa, Saad H. Alotaibi, Mohammed A. Amin
Article
Chemistry, Physical
Mohsen Al-Qhtani, Ghulam M. Mustafa, Nasheeta Mazhar, Sonia Bouzgarrou, Qasim Mahmood, Abeer Mera, Zaki I. Zaki, Nasser Y. Mostafa, Saad H. Alotaibi, Mohammed A. Amin
Summary: The structural stability, Curie temperature, spin polarization, half magnetic ferromagnetism, and transport properties of ZnX2Se4 (X = Ti, V, Cr) chalcogenides were studied using density functional theory (DFT). The results revealed that ZnCr2Se4 has the highest Curie temperature, Ti, V, and Cr spinels exhibit half metallic ferromagnetic behavior, and ZnTi2Se4 has the highest power factor.
Article
Materials Science, Multidisciplinary
Yanbin Wang, Xinyou Huang, Ziqiu Cheng, Penghui Chen, Yuyang Chen, Junhao Ye, Haohong Chen, Zhenzhen Zhou, Denis Yu Kosyanov, Jiang Li
Summary: Uniform Al2O3-Ce:LuAG composite phosphor ceramics (CPCs) with excellent luminescent properties and thermal stability have been successfully synthesized in this study, showing great potential for application in solid-state laser lighting.
Article
Materials Science, Multidisciplinary
Syed Muhammad Ali Zaidi, Mazhar Ali Kalyar, Zulfiqar Ali Raza, Aayesha Shoukat, Rubaila Waseem, Muhammad Aslam
Summary: Polyvinyl alcohol (PVA) nanocomposite strips embedded with graphene nanosheets and copper-ferrite nanoparticles were synthesized using solution casting technique. Laser pulse irradiations were then applied to modify the structural, optical, and electrical properties of the strips, showing potential for optoelectronic devices.
Article
Materials Science, Multidisciplinary
Yunru Chen, Jialing Wu, Jiajia Wang, Shihui Ma, Hongwei Yu
Summary: This paper investigates the angular non-critical phase-matching second-harmonic-generation properties of Ba3(ZnB5O10)PO4 crystal and explores its potential applications in the output spectral regions.
Article
Materials Science, Multidisciplinary
Qun Jing, Menglin Zhu, Lu Li, Xu Ji, Haiming Duan, Henglei Chen, Ming-Hsien Lee
Summary: The paper introduces two new nonlinear optical materials, MZnPO4 (M = Rb, Cs), synthesized by cation substitution. These materials exhibit a honeycomb-like structure and show mild SHG responses with short absorption edges. The thermal properties, IR spectra, and theoretical calculations of the materials are also discussed.
Article
Materials Science, Multidisciplinary
Camila Ianhez-Pereira, Akhil Kuriakose, Ariano De Giovanni Rodrigues, Ana Luiza Costa Silva, Ottavia Jedrkiewicz, Monica Bollani, Marcio Peron Franco de Godoy
Summary: This study aims to evaluate the crystalline changes induced by ultrafast laser micromachining on manganese oxide thin films using micro-Raman spectroscopy. The results show that laser-writing is effective in locally modifying low-crystallinity films and increasing crystallite sizes, highlighting an interesting approach to evaluate laser-induced structural modifications on metal oxide thin films.
Article
Materials Science, Multidisciplinary
Kamal Bansal, Neeraj Kumar Mishra, Ibrahim Abdullahi, Param Jeet Singh, Mohit Tyagi, Sukhpal Singh
Summary: A novel Sm3+ activated oxyfluoride glass was synthesized and its structure and properties were analyzed. The glass showed potential applications in lasers, optical temperature sensing, and high-energy scintillators.
Article
Materials Science, Multidisciplinary
Xingjian Wang, Zhixu Wu, Jiawei Zhu, Yubin Kang, Mengqiang Cai, Yong Xia, Hui Deng
Summary: Antimony sulfide (Sb2S3) has been investigated as a promising material for visible light photodetectors due to its non-toxicity, stability, and high absorption coefficient. In this study, we systematically explored the impact of key parameters on the performance of Sb2S3 devices using simulation and successfully fabricated self-powered photodetectors with high responsivity and specific detectivity. Furthermore, we demonstrated the application of the Sb2S3 detector in a scanning imaging system, showcasing its potential for developing new types of visible light detectors and imaging systems.
Article
Materials Science, Multidisciplinary
O. I. Sallam, R. M. Ahmed
Summary: The 20NaF-60P2O5-20Na2O fluorophosphate glass systems doped with 3 wt% of CoO and NiO were investigated for their optical parameters before and after gamma irradiation. The presence of defects within the glass network and the addition of transition metals were found to affect the properties of the composites. After irradiation, a red shift was observed in the dissipation factor spectrum. The energy lost at the surface of the composites was larger than the energy lost within the constituent materials. All investigated composites showed insulating behavior and exhibited increased nonlinear optical parameters after irradiation, with the CoO-doped composite showing the highest values.
Article
Materials Science, Multidisciplinary
Fahimeh Ahmadi, Zeinab Ebrahimpour, Asghar Asgari, Bao Van
Summary: In this study, Er3+-doped sulfophosphate glasses containing titanium nanoparticles (TiO2 NPs) and different concentrations of silver nanoparticles (AgNPs) were synthesized. The impact of AgNPs on the physical and structural characteristics, optical absorption and emission features, and photocatalytic activity of the glasses were investigated. The results showed that the addition of AgNPs enhanced the emission intensity of the glasses, with the system containing 0.04 mol% of AgNPs exhibiting optimal performance. Furthermore, the presence of AgNPs and TiO2 NPs in the glass matrix positively affected the photocatalytic performance.
Article
Materials Science, Multidisciplinary
Zhuang Li, Rongfei Huang, Wei Yuan, Shaoqiang Zheng, Wenlu Liao, Huiying Xu, Zhiping Cai
Summary: This study reports the first realization of an 868 nm Pr:YLF laser pumped by an InGaN blue laser diode. The laser achieved a maximum power of 641 mW with stable output and good beam quality. The experimental results were in agreement with theoretical simulations.
Article
Materials Science, Multidisciplinary
Bhishma Karki, Youssef Trabelsi, Amrindra Pal, Sofyan A. Taya, Ram Bharos Yadav
Summary: This study proposes an SF11 Prism- Ag- ZnO nanowires-CeO2-Sensing layer-based surface plasmon resonance sensor for measuring dopamine concentration in human blood. The sensor demonstrates high sensitivity and detection accuracy, and holds significant importance for early diagnosis of neurological diseases.
Article
Materials Science, Multidisciplinary
M. Taoufiq, A. Soussi, A. Elfanaoui, A. Ait Hssi, S. Baoubih, A. Ihlal, K. Bouabid
Summary: In this study, the effect of copper doping within ZnS on glass substrates was investigated through experimental and theoretical approaches. Pure ZnS and Cu-doped ZnS films with varying copper concentrations were deposited on glass substrates using the SILAR technique. The structural, morphological, and optical properties of the films were characterized, and the theoretical FP-LAPW method based on density functional theory was employed to study the properties of copper-doped ZnS.
