Article
Chemistry, Physical
Duocheng Bu, Chen Yang, Donglei Bu, Shaoming Huang
Summary: In this study, a series of direct Z-scheme heterostructural catalysts (CeO2/Cu-I-bpy) were designed and constructed for simultaneous photocatalytic hydrogen evolution and organic pollutant degradation. The hybrid catalyst exhibited significantly enhanced performance compared to the individual catalysts (Cu-I-bpy and CeO2) in terms of hydrogen evolution efficiency and pollutant degradation rate. The mechanism investigation confirmed a direct Z-scheme charge transfer mechanism in the CeO2/Cu-I-bpy, leading to improved electron-hole separation efficiency and simultaneous reduction and oxidation abilities. This work demonstrates the potential of turning wastewater into energy resources using carefully designed photocatalytic systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Dongying Wang, Binghua Ren, Shuangyang Chen, Sinan Liu, Wei Feng, Yan Sun
Summary: Snowflake-like BiVO4 and TiO2 microspheres were synthesized via a hydrothermal method and then physically mixed to create BiVO4/TiO2 composites with a Z-scheme heterojunction. The composites exhibited high photocatalytic performance and showed potential for degrading pollutants in wastewater.
Article
Chemistry, Physical
Qianyu Liu, Jian Cao, Yuan Ji, Yumeng Liu, Chunbo Liu, Guangbo Che, Dandan Wang, Junming Cao, Weijun Li, Xiaoyan Liu
Summary: A simple hydrothermal strategy was used to prepare CdxZn1-xS-FG nanocomposites as multifunctional photocatalysts for photocatalytic degradation of organic dyes and hydrogen evolution. By adjusting the Cd2+ and Zn2+ ions ratio, the bandgap of the nanocomposites can be tuned, with Cd0.3Zn0.7S-FG showing the highest H-2 evolution rate and degradation efficiency under visible light irradiation.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Jingjing Li, Xinyan Xiao, Yu Xiao, Mingli Lu
Summary: In this study, a novel Z-scheme BiOCl/Bi24O31Br10 heterojunction with hierarchical structure was fabricated for the first time, where BiOCl nanosheets grew in-situ and vertically on the surface of Bi24O31Br10 nanosheets. The obtained composites exhibited favorable photocatalytic activity for RhB degradation under simulated sunlight irradiation, and the BB-0.3 composite showed the best photocatalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Yi Lin, Dongmei Pan, Hong Luo
Summary: The superior performance of CdS/BiVO4 heterostructure photocatalyst comes from the internal electric field suppression of photoinduced carriers combination, prolonged electron-hole pairs lifetime, and maintained sufficient redox reaction driving force.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
Annamalai Raja, Namgyu Son, Misook Kang
Summary: Nanocomposite photocatalysts have been used to produce clean hydrogen and degrade organic pollutants. This study presents a ternary composite photocatalyst that outperforms traditional catalysts in terms of hydrogen evolution and organic pollutant degradation. The improved efficiency of the composite is attributed to the synergistic effect of the electron transfer bridge and the quick and efficient separation of photoinduced charge carriers.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Zuowei Zhang, Hongshun Hao, Hang Yang, Liangliang Zhu, Chao Ding, Gongliang Zhang, Jingran Bi, Shuang Yan, Guishan Liu, Hongman Hou
Summary: The Ag2O/Ag2S/CuBi2O4 double Z-scheme heterostructures photocatalysts were successfully synthesized via hydrothermal and coprecipitation methods with different Ag2O proportions, exhibiting enhanced photocatalytic performance, especially under near-infrared light irradiation.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
Yong Jia, Xu Zhang, Ruyi Wang, Jing Yuan, Ruizi Zheng, Jiaqi Zhang, Fuping Qian, Yafen Chen, Ming Zhang, Lina Guo
Summary: A WO3/Bi2WO6 (WBWO) composite with a direct Z-scheme was fabricated for efficient photocatalytic removal of toluene. WBWO-3 (WO3:B i2WO6 mass ratio of 3:1) exhibited the highest photocatalytic conversion rate of toluene, reaching 92% within 60 minutes, which was much better than pure WO3 (45%) and Bi2WO6 (63%). The excellent performance of WBWO is attributed to the construction of a direct Z-scheme band structure, promoting effective charge separation and retaining the catalyst's intrinsic redox capacity. Hydroxyl radical (OH) and superoxide radical (O2-) were identified as important active radicals in the photocatalytic oxidation of toluene.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Jingru Guo, Liping Wang, Xiao Wei, Zeid A. Alothman, Munirah D. Albaqami, Victor Malgras, Yusuke Yamauchi, Yunqing Kang, Meiqi Wang, Weisheng Guan, Xingtao Xu
Summary: The construction of a Z-scheme CuInS2/Bi2MoO6 heterostructure via in-situ hydrothermal reactions resulted in superior photocatalytic activity towards the degradation of tetracycline under visible light, with 8 and 2.5 times improvements compared to their individual components. The enhanced photocatalytic performance is mainly attributed to effective charge transfer at the interface and the ternary sulfide semiconductor absorbing light in the useful region of the solar spectrum.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Munir Ahmad, Muhammad Tauseef Qureshi, Wajid Rehman, Nouf H. Alotaibi, Anadil Gul, Reda S. Abdel Hameed, Mahmoud Al Elaimi, M. F. H. Abd El-kader, Muhammad Nawaz, Rizwan Ullah
Summary: In this study, ZnO and Ag@ZnO nanoparticles based photocatalyst were synthesized using pecan nut leaf extract for the first time, with phytochemicals acting as capping and reducing agents. The catalyst showed enhanced catalytic properties after Ag doping, with optimal performance at pH 10 and following a pseudo first order kinetic model for RhB dye degradation. The reusability test demonstrated high stability of the catalyst even after 5 cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Spectroscopy
Xiaoling Xu, Xiaoxi Xu, Tianqi Wang, Mengxiao Xu, Xianglu Yang, Junwei Hou, Dandan Cao, Qingyao Wang
Summary: The ternary CdS/Ag/TiO2 NTs photocatalysts with indirect Z-scheme heterojunctions were successfully synthesized and demonstrated great performance in the photodegradation and hydrogen production. The extended light absorption range and enhanced photoelectron transportation efficiency of the ternary catalyst were observed compared to the binary heterojunction counterpart. This work provides practical guidance for designing high-efficient photocatalysts with Z-scheme heterojunctions for solar energy development, pollutant remediation, and photoelectric conversion.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Engineering, Environmental
Yuchan Li, Bin Yu, Zhenqi Hu, Hong Wang
Summary: This study successfully synthesized a highly efficient SnS2@ZnIn2S4@kaolinite (SZK) photocatalyst, which showed significant degradation capability towards tetracycline hydrochloride (TCH). The SZK heterostructure demonstrated enhanced photocatalytic efficiency and degradation rate under visible light illumination, with O-2(-) and O-1(2) identified as the main active species. The superior performance of SZK is attributed to the synergistic effect of its components, providing new insights for visible light photocatalytic degradation of antibiotics in wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Chemistry, Multidisciplinary
Linxi Wang, Chuanbiao Bie, Jiaguo Yu
Summary: This study analyzes the challenges of photocatalytic mechanisms in liquid-phase and all-solid-state Z-scheme systems from various perspectives, including thermodynamics, charge-transfer dynamics, applicability, and practical synthesis. It highlights the challenges for electron transfer in liquid-phase Z-scheme systems, where the dynamic motion of photocatalyst nanoparticles and redox couples, as well as the prohibition of transferring free electrons via water media, ultimately led to the flourishing of step-scheme heterojunctions.
TRENDS IN CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Heling Zhang, Yuqi Wan, Simin Shang, Qingrong Cheng, Zhiquan Pan
Summary: Hollow CeO2 nanospheres were grown on UIO-66-NH2 nanosheets to form a novel CeO2/UiO-66-NH2 (abbreviation, CUx) Z-scheme heterojunction photocatalyst. CU0.50 composite exhibited the highest photocatalytic performance for hydrogen production and degradation of organic pollutants. The enhanced performance is attributed to the formation of a band-position-matched hollow structure heterojunction between CeO2 and UIO-66-NH2, which inhibits carrier recombination and increases specific surface area and light absorption.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Siqi Chu, Yue Hu, Jie Zhang, Zhiwei Cui, Jinyan Shi, Ying Wang, Zhigang Zou
Summary: A direct Z-scheme CuO/PI heterojunction photocatalyst was successfully constructed, demonstrating extended absorption towards visible light region and enhanced photocatalytic performance through the direct Z-scheme charge transfer mechanism. The hydrogen production rate of the photocatalyst under visible light irradiation significantly increased, and stable activity was maintained after multiple runs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Environmental Sciences
Maria Khalil, Muhammad Asif Hanif, Umer Rashid, Junaid Ahmad, Ali Alsalme, Toshiki Tsubota
Summary: The present study focuses on the preparation and utilization of granite stone powder waste composite for the effective removal of Terasil dye. The results showed that the granite composites prepared using sodium metasilicate exhibited an exceptionally high dye adsorption capacity. Characterization techniques such as scanning electron microscopy and Fourier transform infrared spectroscopy were employed to determine the morphological features and functional groups of the granite composites.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Ali Alsalme, Rais Ahmad Khan, Malak Faisal Altowairqi, Nouf Abdul Rahman Almuryyi
Summary: This article reports on the simulation of FTO/TiO2/MA(3)Sb(2)I(9)/spiro-OMeTAD solar cells. The thickness of the absorber layer, hole-transport layer, or electron-transport layer was varied during the simulation process and the optimized solar cells demonstrated a high efficiency of 14.90% and an open circuit voltage of 1.41 V.
Article
Biochemistry & Molecular Biology
Ali Alsalme, Malak Faisal Altowairqi, Afnan Abdullah Alhamed, Rais Ahmad Khan
Summary: In this study, SCAPS-1D was used for the numerical simulation of lead-free perovskite solar cells (PSCs), and the thickness of the zinc oxysulphide, MAGeI(3), and spiro-OMeTAD layers was optimized. The optimized PSCs showed excellent power conversion efficiency of 21.62%.
Article
Chemistry, Applied
Umer Rashid, Balkis Hazmi, Rose Fadzilah Abdullah, Siti Fadhilah Ibrahim, Ali Alsalme, Toshiki Tsubota
Summary: In this study, palm kernel shell-based char was developed and utilized for synthesizing bifunctional carbon catalyst. The catalyst showed higher surface area and stronger acid-base properties, making it suitable for efficient esterification and transesterification reactions.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Physical
Huda Alsaeedi, Ali Alsalme
Summary: In recent years, the surface modification of glassy carbon electrodes using nanomaterials has gained significant attention for the advancement of electrochemical sensors. This study synthesized molybdenum disulfide (MoS2) through hydrothermal synthesis and investigated its electro-catalytic properties for the fabrication of a resorcinol sensor. The results showed that the MoS2-modified glassy carbon electrode exhibited excellent sensitivity and stability for detecting resorcinol.
Article
Chemistry, Physical
Atikhun Chottiratanachote, Manaswee Suttipong, Umer Rashid, Vudhichai Parasuk, Junko Nomura Kondo, Toshiyuki Yokoi, Ali Alsalme, Chawalit Ngamcharussrivichai
Summary: This study aims to synthesize alpha,beta-unsaturated carbonyl compounds with branched structures via aldol condensation of furfural and 2-butanone using MgAl mixed oxides as catalysts. The most suitable catalyst is LDO3 with a 3:1 Mg:Al atomic ratio. The suitable reaction conditions to produce the branched-chain C9 ketones are 1:5 furfural:2-butanone molar ratio, 5 wt.% catalyst loading, 120 degrees C reaction temperature, and 8 h reaction time.
Article
Chemistry, Multidisciplinary
Huda Alsaeedi, Hilal Ahmad, Malak Faisal Altowairqi, Nouf AbdulRahman Almuryyi, Ali Alsalme
Summary: A graphene oxide (GO/CdS) nanocomposite was synthesized and used for micro solid phase extraction procedure. The nanocomposite selectively extracts Hg(II) ions from different water samples and shows excellent extraction efficiency. The method has a low detection limit, good accuracy and precision, and has been successfully verified using standard reference materials and real samples.
Article
Chemistry, Physical
N. Sivakumar, P. Vijayakumar, R. Jayavel, Ali Alsalme, Abdullah S. Alsulami, Yuui Yokota
Summary: The pure and strontium substituted LaFeO3 samples were synthesized and characterized with good quality single crystals grown for dielectric and magnetic measurements. The orthorhombic structure and composition of the samples were confirmed by X-ray diffraction and energy dispersive X-ray spectroscopy analysis. The dielectric constant increased in the Sr substituted LaFeO3 crystal and magnetic properties were tested with M-H loop.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Environmental Sciences
Ali Alsalme, Hilal Ahmad, Rais Ahmad Khan, Bon Heun Koo, Ghadah M. M. Alharbi, Shahad I. I. Alhadlaq
Summary: This study chemically introduced thioglycolic acid to improve the selectivity of graphene oxide (GO) nanosheets for metal ion extraction. A solid phase extraction method was developed and optimized, which showed good reliability, accuracy, and low detection limits for arsenic and mercury ions. Real samples were analyzed to validate the established procedure.
Article
Chemistry, Inorganic & Nuclear
Ali Alsalme, Huda Alsaeedi, Malak Faisal Altowairqi, Rais Ahmad Khan, Ghadah M. Alharbi, Afnan A. Alhamed
Summary: Heavy metal ions can be harmful to human health in the environment and diet. Reliable and accurate technologies for their detection are essential for global healthcare improvement. This study presents a sol-gel method to prepare nickel oxide (NiO) nanoparticles. The NiO nanoparticles were characterized by PXRD, SEM, and EDS, showing a nanosphere-shaped morphology. A gold electrode (Au) was coated with NiO nanoparticles via drop-casting, and it exhibited good performance as an arsenic sensor with sensitivity of 3.10 mu A/ppb and a limit of detection of 1.94 ppb. This is the first report utilizing NiO/Au with two electrochemical techniques for arsenic detection.
Article
Chemistry, Multidisciplinary
Ali Alsalme
Summary: We prepared a new GO/Fe3O4@beta-lactoglobulin sorbent for selective extraction of trace Pb(II). The sorbent demonstrated a faster permeation rate compared to the nascent GO column. The developed SPE method showed a low detection limit for Pb(II) ion and good precision.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Ali Alsulmi, Mohamed H. Shaker, Abanoob M. Basely, M. F. Abdel-Messih, Ayman Sultan, M. A. Ahmed
Summary: This research work demonstrated the use of S-scheme Ag2CO3/g-C3N4 heterojunctions for the remediation of Rhodamine B dye under natural sunlight irradiation. The deposition of spherical Ag2CO3 nanoparticles on the surface of g-C3N4 sheets significantly improved the electron-hole separation efficiency and absorption capacity of the photocatalysts. The heterojunctions containing 5 wt% Ag2CO3 and 95 wt% g-C3N4 degraded Rhodamine B dye three times faster than pristine g-C3N4 nanosheets. This study contributes to the development of efficient and low-cost wastewater treatment using S-scheme heterojunctions under natural solar irradiation.
Article
Chemistry, Multidisciplinary
Mahmoud A. Ahmed, Mohamed A. Ahmed, Ashraf A. Mohamed
Summary: A magnetic nanocomposite of MCSGO was synthesized and applied to the removal of SAF and IC dyes from wastewater. The as-prepared MCSGO nanocomposite showed high adsorption capacity for both dyes. The structure, magnetic, and physicochemical features of MCSGO were thoroughly investigated, and the effects of operational parameters were studied.
Article
Biochemistry & Molecular Biology
Syed Ghazanfar Ali, Uzma Haseen, Mohammad Jalal, Rais Ahmad Khan, Ali Alsalme, Hilal Ahmad, Haris Manzoor Khan
Summary: In this study, copper oxide nanoparticles were synthesized using the leaves of Aegle marmelos plant and characterized by various techniques. The nanoparticles showed a crystalline structure and exhibited antimicrobial activity and photocatalytic degradation of organic dyes.
Article
Chemistry, Multidisciplinary
Rais Ahmad Khan, Amal AlFawaz, Afnan Abdullah Alhamed, Nouf Abdulrahman AlMuryyi, Imran Hasan, Anup Paul, Sandeep Dey, Saad. G. Alshammari, Hadi D. Arman, Ali Alsalme
Summary: A new cobalt(II) coordination polymer 'Cp-Co' with a periodic 3D framework was designed, synthesized, and characterized. It exhibited outstanding photocatalytic degradation efficiency for methyl green (MG) dye under visible light irradiation, and the reaction variables were optimized.
NEW JOURNAL OF CHEMISTRY
(2023)