Article
Chemistry, Physical
Lei Yang, Ruyi Wang, Ningning Zhou, Dewei Liang, Delin Chu, Chonghai Deng, Hai Yu, Jianguo Lv
Summary: The introduction of oxygen vacancies (Ov) has been proven efficient in enhancing the photoelectrochemical (PEC) water splitting performance. In this study, BiVO4 (BVO) photoanodes with both bulk and surface Ov were fabricated and their roles in PEC performance were investigated. The bulk Ov increased carrier density and improved electron-hole separation efficiency, while the surface Ov provided abundant active sites for charge injection. The synergistic effect between the bulk and surface Ov resulted in highly promoted PEC water splitting activity, offering a promising strategy for efficient solar water splitting systems.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Shangqi Sun, Daming Chen, Mengyao Shen, Liguang Qin, Zhen Wang, Youchun Wu, Jian Chen
Summary: By combining the strategy of MOF-derived structure and plasma fabrication, a highly defective TiO2/C nanocomposite with extraordinary electrochemical performance was successfully fabricated.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Meng Li, Jingxue Sun, Bowen Cong, Shunyu Yao, Gang Chen
Summary: This study focuses on regulating sulfur vacancies in plasmonic semiconductor nanomaterials to enhance carriers density and achieve localized surface plasmon resonance (LSPR), leading to improved hydrogen production through electron reactions in the semiconductor conduction band.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Linchangqing Yang, Junfang Li, Meng Yin, Qingkong Kong, Guangcheng Xi
Summary: Due to its layered structure, graphdiyne has a strong tendency to form 2D materials, and most of the current research is based on GDY 2D structures. However, the synthesis of ultrathin nanowires with a high aspect ratio has not been reported. In this study, ultrathin GDY nanowires with diameters below 3 nm were successfully synthesized using a two-phase interface method, exhibiting excellent crystallinity and an aspect ratio of over 2500. The formation of GDY ultrathin nanowires is believed to follow the oriented-attachment mechanism of nanoparticles. These nanowires demonstrate significant quantum confinement effect, enhanced photoelectric effect, and promising applications in surface-enhanced Raman sensing.
Article
Chemistry, Physical
Jun Zhao, Miao Zhou, Li-Yang Xiao, Zi-Han Zhou, Xi-Wen Du, Jing Yang
Summary: Designing a highly efficient and stable electrode is crucial for photoelectrochemical water splitting. This study developed a unique ZnO1-x/3D-Al composite photoanode for efficient water splitting. The 3D-Al nanostructure improves light absorption while the presence of oxygen vacancies facilitates charge separation in ZnO1-x. The integrated ZnO1-x/3D-Al photoanode shows an enhanced photocurrent density due to the synergy effect between plasmon resonance and oxygen vacancies.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Meikun Shen, Tianben Ding, Che Tan, William H. Rackers, Dongyan Zhang, Matthew D. Lew, Bryce Sadtler
Summary: By controlling the surface-ligand redox chemistry on nanowires, the concentration of active sites on photocatalysts can be enhanced, leading to a significant improvement in photocatalytic water oxidation activity. This research result is of great significance for understanding the role of ligands in the catalytic process of nanocrystal catalysts.
Article
Chemistry, Physical
Biying Liu, Man Zhang, Yuchen Wang, Zuo Chen, Kai Yan
Summary: In this study, bimetallic and trimetallic LDHs nanosheets were successfully prepared using coprecipitation coupled with the hydrothermal method, exhibiting superior performance for OER. Among them, NiCoMn-LDHs nanosheets showed the lowest overpotential and smallest Tafel slope, attributed to the exposed active sites and oxygen vacancies for efficient oxygen evolution.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Multidisciplinary Sciences
Sultan Ben-Jaber, Daniel Glass, Thomas Brick, Stefan A. Maier, Ivan P. Parkin, Emiliano Cortes, William J. Peveler, Raul Quesada-Cabrera
Summary: Photo-induced enhanced Raman spectroscopy (PIERS) is a highly sensitive surface-enhanced Raman spectroscopy (SERS) technique for detecting ultra-low concentrations of organic molecules. This study compares PIERS with Vo-induced SERS approaches to further confirm the role of Vo in PIERS and presents a proposed mechanism and discussion on using PIERS as a probe to explore photocatalytic materials.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Zhuang Yang, Meng Yuan, Bin Liu, Wenying Zhang, Aziz Maleki, Baolin Guo, Ping'an Ma, Ziyong Cheng, Jun Lin
Summary: Ultrasound-mediated sonodynamic therapy (SDT) has shown great potential for tumor treatment due to its high tissue penetration depth, non-invasiveness, and controllability. However, the inefficient electron-hole separation of sonosensitizers and tumor hypoxia are two major challenges that limit the effectiveness of SDT. In this study, ultrafine photoetched bismuth vanadate (BiVO4) nanorods modified with DSPE-PEG(2000) (PEBVO@PEG NRs) were fabricated to address these challenges by providing in situ self-supply of oxygen (O-2) and reactive oxygen species (ROS) for hypoxic tumor therapy. The photoetching approach improved the charge separation efficiency and the generation of ROS and O-2. The PEBVO@PEG NRs showed promising sonodynamic therapeutic effects and provided new strategies for enhancing the performance of sonosensitizers and eliminating hypoxic tumors.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Lipeng Deng, Haizheng Hu, Yuchao Wang, Chao Wu, Huaile He, Jiaxin Li, Xiaobing Luo, Fabi Zhang, Daoyou Guo
Summary: In this study, plasma treatment technology was used to modify the surface structure of Ga2O3 material, reducing the generation of oxygen vacancies. A photodetector was constructed and the results showed that plasma treatment could improve the photocurrent and photoresponse speed of the detector. This study demonstrates that plasma treatment is an effective method for treating oxygen vacancies and obtaining high-performance photodetectors.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Meihui Ying, Xing Lin, Guizeng Yang, Huiling Ye, Haibo Pan, Min Du
Summary: In this study, a surface enriched with oxygen vacancies was achieved for NiFe LDHs on nickel foam by using cerium (III) ion as an assistant reagent. The electrocatalyst exhibited extremely high OER activity at low potential and showed good stability. This research provides a promising method for designing highly active NiFe LDHs OER catalysts.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Review
Chemistry, Multidisciplinary
Feng Enduo, Tian Yang
Summary: Surface-enhanced Raman scattering (SERS) technology, through the self-assembly of superstructures and the formation of optical resonators, can significantly enhance the Raman signal of absorbed molecules. The rapid development of SERS substrates has brought new opportunities and challenges to SERS analysis and applications in various fields.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2021)
Article
Engineering, Environmental
Jiwen Li, Xiaoran Sun, Yaqian Duan, Jingjun Ma, Chaozheng He, Shijie Li
Summary: Defect engineering is utilized to improve the photocatalytic CO2 reduction performance by fabricating ultrathin Bi24O31Br10 nanosheets with abundant oxygen vacancies. The generation of stronger local charge around the oxygen vacancies promotes the dissociation of CO2 and facilitates the production of COOH* intermediate. The ultrathin oxygen vacancy-rich Bi24O31Br10 nanosheets achieve nearly 100% CO selectivity and high CO yield rate in pure water under visible light without any cocatalysts or sacrificial agents.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jinping Tang, Li Song, Han Xie, Jinyu Zhu, Wei Li, Guangyang Xu, Linjun Cai, Xiao Xia Han
Summary: The study demonstrates the potential of SERRS for monitoring the interaction between mitochondria and endoplasmic reticula in apoptosis. SERRS allows for label-free, in situ, and real-time monitoring of ROS formation and cytochrome c release, providing a novel strategy for cancer treatment.
Article
Energy & Fuels
Amar K. Salih, Matthew R. Phillips, Cuong Ton-That
Summary: This study presents a simple method to produce highly efficient ZnO photoanodes for solar-driven water splitting. The fabrication process involves post-growth oxidation of a metallic Zn layer, resulting in a nanostructured ZnO film with a high concentration of surface oxygen vacancies. The ZnO photoanodes exhibit exceptional photocurrent density due to the ionized VO defects, making it one of the best-performing ZnO-based photoelectrodes reported so far. This research demonstrates a promising approach for large-scale production of efficient ZnO-based photoanodes.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
