Article
Chemistry, Multidisciplinary
Man Wang, Gongxin Zhang, Zhongjie Guan, Jianjun Yang, Qiuye Li
Summary: Spatially separated loading of reductive and oxidative cocatalysts on ZnIn2S4 nanosheets was achieved through designing a ternary Co9S8@ZnIn2S4@PdS (CS@ZIS@PS) hollow tubular core-shell structure. This structure not only efficiently improved charge separation and accelerated surface reduction-oxidation kinetics, but also generated a photothermal effect to further enhance charge transfer and surface reaction kinetics. The optimized CS@ZIS@PS showed a remarkable H-2 evolution rate and apparent quantum efficiency, making it one of the highest values among ZnIn2S4 materials.
Article
Engineering, Environmental
Haiyang Liu, Feng Sun, Hong Shao, Duanduan Yin, Xinyue Li, Qianli Ma, Guixia Liu, Hui Yu, Wensheng Yu, Xiangting Dong
Summary: In this study, ZnIn2S4 nanosheets with S vacancies were successfully grown on graphene aerogels (S-ZISA) using a facile one-pot oil bath method. The S vacancies improved light absorption and served as active sites for electron capture. Under visible light illumination, S-ZISA-2 achieved 98% reduction of Cr(VI) with a rate constant 4.5 times higher than that of pure ZnIn2S4. The S-ZISA-2 also exhibited high rate of hydrogen evolution and good cyclability. This study provides a new strategy for synthesizing aerogel photocatalysts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Yuxing Shi, Zhouze Chen, Pengyu Hao, Pengnian Shan, Jialin Lu, Feng Guo, Weilong Shi
Summary: This study presents the design of a composite photocatalyst for efficient photothermal-assisted photocatalytic water/seawater splitting. The addition of Fe3O4@SiO2 nanoparticles on the surface of ZnIn2S4 micro-flowers increases the surface reaction temperature and promotes hydrogen generation. The photocatalytic hydrogen production rates over the composite catalyst are significantly higher compared to pristine ZnIn2S4.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Lin Liu, Yan Wu, Ru Song, Yu Zhang, Yafei Ma, Jun Wan, Meili Zhang, Huali Cui, Hua Yang, Xiaoli Chen, Jijiang Wang
Summary: An innovative S-scheme photocatalyst composed of ultrathin ZnIn2S4 (ZIS) nanosheets uniformly anchored on the surface of an organic semiconductor PDIIM was successfully fabricated. The optimized mass ratio of ZIS/PDIIM heterojunction achieved a photocatalytic H-2 generation rate of 13.04 mmol/g/h, which is 2.64 and 14.02 times higher than that of pristine ZIS and PDIIM, respectively.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yufeng Pan, Bin Xiong, Zha Li, Yan Wu, Chunjie Yan, Huaibin Song
Summary: The photocatalytic hydrogen evolution was enhanced by in situ constructing oxygen-vacancy-rich MoO3-x/porous g-C3N4 heterojunctions and optimizing the MoO3-x precursor content. The presence of oxygen vacancies and high porosity induced more active sites, leading to efficient charge separation and enhanced photocatalytic performance for hydrogen evolution.
Article
Chemistry, Physical
Chao Liu, Xin Gao, Caijun Zhangai, Ting Cheng, Yan Wang, Beibei Zhang, Pengyu Dong, Xiaowei Chen, Xinguo Xi, Zhigang Zou
Summary: The construction of a layered heterojunction photocatalyst through a two-step exfoliation-reassembly process facilitated efficient charge carrier separation and transfer, leading to enhanced photocatalytic activity. The improved performance was attributed to the increased specific surface area and porous structure providing more active sites for photocatalytic reactions in the layered heterostructure. Photoluminescence spectra and photo-electrochemical analysis confirmed the efficient separation and transfer of photoinduced charge carriers in the heterojunction photocatalyst.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Chemistry, Physical
Wenbin Wang, Chen Liu, Haiyan Li, Dongbin Dang, Yan Bai
Summary: In this study, a photocatalyst with excellent H2 production activity in an alkaline environment was successfully synthesized. The hydrogen production performance of the optimal sample reached 5394.17 mmol g-1 under highly alkaline conditions. The superior H2 evolution activity is mainly attributed to the p-n heterojunction creating an internal-built electric field on the interface of the two semiconductors, enabling effective spatial separation of electron-hole pairs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Multidisciplinary Sciences
Shaohui Guo, Xuanhua Li, Ju Li, Bingqing Wei
Summary: The study introduces an efficient biphase photocatalytic system composed of integrated photothermal-photocatalytic materials using charred wood substrates to convert liquid water to water steam and split hydrogen under light illumination without additional energy. This system significantly reduces the interface barrier and greatly lowers the transport resistance of hydrogen gas, achieving an impressive hydrogen production rate in particulate photocatalytic systems.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Mingyuan Zhang, Pengfei Tan, Lu Yang, Huanhuan Zhai, Hele Liu, Jiaoyang Chen, Ruifeng Ren, Xiyu Tan, Jun Pan
Summary: Constructing a p-n heterojunction with vacancy can enhance carrier separation and migration, leading to improved photocatalytic hydrogen evolution performance. In this study, a sulfur vacancy riched-ZnIn2S4/NiWO4 p-n heterojunction photocatalyst (VZIS/NWO) was designed and fabricated. The presence of sulfur vacancy and the formation of p-n heterojunction were confirmed through various characterization techniques. The optimized VZIS/NWO-5 catalyst showed significantly enhanced H2 generation performance compared to pristine ZnIn2S4, highlighting the importance of the synergy between p-n heterojunction and sulfur vacancy for photocatalytic hydrogen evolution.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Lilei Zhang, Manzhou Hong, Ka Zhang, Botan Li, Haipeng Fang, Xun Feng, Xiuchan Xiao
Summary: This paper reports a strategy to synthesize Cd0.9Co0.1S nanorods using a one-pot solvothermal method. The optimized nanorods exhibit a large aspect ratio and good polycrystalline plane structure, resulting in a significantly shortened photogenerated carrier transfer path and fast separation. The addition of an appropriate amount of Co enhances visible light-harvesting and generates a photothermal effect, improving surface reaction kinetics and charge transfer rate. The internal electric field facilitates carrier separation and transfer, effectively impeding recombination.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Yuchen Guo, Liang Mao, Yuan Tang, Qianqian Shang, Xiaoyan Cai, Junying Zhang, Huilin Hu, Xin Tan, Lequan Liu, Huaiyuan Wang, Tao Yu, Jinhua Ye
Summary: This study developed a convenient and mild two-step solvothermal strategy to design a metal-assisted photocatalytic system. The photothermal effect of the metallic cocatalyst improved the kinetics of water splitting, resulting in an enhanced photocatalytic hydrogen evolution rate.
Article
Chemistry, Physical
Haiyan Yu, Haiou Liang, Jie Bai, Chunping Li
Summary: This study designed a CdS/Cu2S/SiO2 heterostructure with one-dimensional hollow tube morphology using CuO/SiO2 hollow tube as a carrier. The hexagonal phase CdS and sulfur vacancies were adjusted simultaneously using the reduction strategy of NaBH4 aqueous solution. The CdS/Cu2S/SiO2-10 composite exhibited a high photocatalytic hydrogen production rate and showed excellent cyclic stability due to the strong electron interaction of the heterostructure and the sulfur vacancy acting as an electron trap.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Baorong Xu, Ben Chong, He Li, Guidong Yang
Summary: Heteroatom incorporation is commonly utilized in photocatalysis to construct highly active centers, and cobalt is a desirable dopant for photocatalytic hydrogen production. This study successfully incorporated cobalt into ZnIn2S4 nanosheets, resulting in improved electron occupancy and water dissociation. The enhanced covalency of Co-S bonds balanced hydrogen adsorption and desorption, favoring H2 production. However, increased Co doping weakened water adsorption. Optimum cobalt doping in ZnIn2S4 achieved a significantly enhanced H2-evolution rate of 72.1 μmol h-1, 5.5 times higher than ZnIn2S4.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Baorong Xu, He Li, Ben Chong, Bo Lin, Xiaoqing Yan, Guidong Yang
Summary: Researchers designed ZnIn2S4 nanosheets with controlled Zn vacancies to optimize the conduction band structure and localized charge density. The optimized structure enables orderly charge flow and provides a powerful driving force for H2-evolution reaction. This work sheds light on the electronic structure characteristics of metal vacancy and offers valuable insights for constructing photocatalytic nanomaterials with metal vacancies.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Yiqiao Wang, Jiaxin Li, Shaobo Chen, Yu Xie, Yongcun Ma, Yongping Luo, Jiaqi Huang, Yun Ling, Jianhong Ye, Yanying Liang, Jinyin Du
Summary: In this study, type II heterojunctions were formed by loading ZIS nanosheets onto SCN nanosheets, leading to rapid electron-hole separation and enhanced photocatalytic activity. The best hydrogen production performance was achieved at 20% mass fraction of SCN, showcasing significant improvement compared to pure SCN and ZIS.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
