Article
Chemistry, Physical
Mohua Li, Shijie You, Xiaoguang Duan, Yanbiao Liu
Summary: Defect engineering is an effective method to understand the relationship between structure and catalytic activities of transition metal oxides. In this study, a novel strategy was developed to control the oxygen vacancy levels and modify the surface chemistry of a catalytic membrane. The increased number of Lewis acid sites in the membrane resulted in enhanced catalytic activities.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Qiqi Qi, Yali Li, Hao Liu, Baoying Li, Hong Wang, Yi Lu, Wei Gao, Yingjun Tian, Bingpeng Guo, Xiaofei Jia, Jianbin Chen
Summary: This study systematically compares the activity and selectivity of photocatalysts for the oxidation of 4-phenyltoluene. The results demonstrate that structure control and alkali metal modification can improve photocatalytic activity and selectivity by increasing the amount of singlet oxygen molecules. The prepared photocatalysts also show excellent stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Yi Zhou, Qionghua Li, Jin Zhang, Minghui Xiang, Yinghong Zhou, Zhiyue Chen, Yongbo Chen, Tiantian Yao
Summary: This study demonstrates the importance of the synergy between singlet oxygen and free radicals in driving the degradation of organic pollutants in water. The YBiO2_ x photocatalyst, prepared through a hydrothermal method with yttrium doping, is found to produce oxygen vacancies and possess up-conversion property. Superoxide radicals, singlet oxygen, hydroxyl radicals, and holes play crucial roles in the photocatalytic reaction process. The study also reveals that the degradation efficiency of tetracycline can be maintained in the presence of various anions and humic acid in wastewater, thanks to the synergy between singlet oxygen and free radicals.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Yongguang Bu, Hongchao Li, Wenjing Yu, Yifan Pan, Lijun Li, Yanfeng Wang, Liangtao Pu, Jie Ding, Guandao Gao, Bingcai Pan
Summary: This study presents a mechanism of PDS activation over OV-rich BiOBr samples, where a nonradical mechanism mediated by O-1(2) is utilized for BPA degradation. The surface OVs of BiOBr provide ideal sites for the inclusion of hydroxyl ions, leading to the formation of Bi-III-OH species that act as active sites for PDS activation. This work offers a novel perspective for the activation of peroxides by defective materials without additional energy supply or aqueous transition metal ions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Ming Li, Jianhao Qiu, Jie Xu, Yuxiang Zhu, Jianfeng Yao
Summary: Oxygen vacancies can efficiently activate the photocatalytic oxidation of aromatic alcohol, but the activation mechanism between aromatic alcohol and oxygen vacancies is rarely studied. In this study, a ZnIn2S4/MIL-121 heterostructure with abundant surface uncoordinated carboxyl was designed for the oxidation of benzyl alcohol under visible light. The results showed that the activation of oxygen vacancies to benzyl alcohol was more effective than to oxygen. The conversion rate of benzyl alcohol was significantly improved when the activation occurred on benzyl alcohol instead of oxygen.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Zhimo Fang, Juanjuan Qi, Wenxing Chen, Lin Zhang, Jianhui Wang, Caili Tian, Qin Dai, Wen Liu, Lidong Wang
Summary: By modulating the density of sulfur vacancies, cobalt sulfide catalysts can selectively generate singlet oxygen, enabling highly selective degradation of electron-donating organic pollutants and exhibiting excellent interference resistance for efficient purification applications.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Yongping Gan, Min Huang, Fei Yu, Xing Yu, Zhanjun He, Jin Liu, Tiejun Lin, Yuanyuan Dai, Qiang Niu, Liangshu Zhong
Summary: Light-driven methane conversion to methanol with high selectivity was achieved using Cu/CeO2 catalysts with CO2 as a soft oxidant. The catalyst showed a high selectivity of 96.2% and a high yield of 88.9 mu mol g-1 h-1 for methanol production. Oxygen vacancies in the catalyst facilitated electron trapping and reduced carrier recombination, while CO2 acted as a soft oxidant and accelerated methanol formation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Environmental
Xinyuan Lv, Miao Yu, Yali Guo, Minghao Sui
Summary: In this study, silver-doped cobalt ferrite catalysts were synthesized and used for the activation of peroxymonosulfate in the degradation of sulfamethoxazole. The results showed that Ag-0.06-CoFe2O4 exhibited the best catalytic activity and utilization efficiency, and the silver doping led to the exposure of more active sites and an increase in the concentration of oxygen vacancies.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Teng Huang, Fan Tian, Zhipan Wen, Guangfang Li, Ying Liang, Rong Chen
Summary: Bi/Bi2WO6-x heterostructures were successfully prepared by a facile one-step hydrothermal method, with selective introduction of oxygen vacancy and metallic bismuth into Bi2WO6 nanostructures, leading to significantly improved photocatalytic activity for the photodegradation of bisphenol A and its analogues. Additionally, the concentration of singlet oxygen (O-1(2)) was found to be highly dependent on and modulated by the content of oxygen vacancy and metallic bismuth, with the obtained products displaying efficient photocatalytic performance and enhanced stability.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Sihyeon Jo, Hyejin Kim, Kyoung Eun Lee, Sukhwa Hong, Kangwoo Cho, Sanghoon Kim, Gun-hee Moon, Jonghun Lim
Summary: The selective control of reactive oxygen species (ROS) is crucial in abating aquatic organic pollutants in advanced oxidation processes (AOPs). Copper phosphide (CuxP) exhibits a Janus-like behavior, serving as a solid oxidative reagent under acidic and dark conditions and as a photosensitizer under neutral and light conditions. This dual nature of CuxP allows for the selective production of ROS and offers new possibilities for water treatment and the development of efficient AOP systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Qingdong Qin, Ting Liu, Jiaxuan Zhang, Rui Wei, Shijie You, Yan Xu
Summary: This study prepared oxygen vacancies-enriched alpha-Fe2O3 as a catalyst for PMS activation by thermally treating goethite, showing excellent catalytic activity. The concentration of oxygen vacancies was found to be positively correlated with the degradation rate of SMX, with singlet oxygen identified as the predominant reactive oxygen species. The study comprehensively investigated the factors affecting SMX degradation and proposed possible degradation pathways in the alpha-Fe2O3/PMS system.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Xia Li, Fulin Zhang, Yuexin Wang, Kanghui Xiong, Xianjun Lang
Summary: This study showcases the potential of CMPs in visible light-driven organic transformations by designing and constructing D-π-A type CMPs, with TzTz-CMP-Py exhibiting broad visible light absorption and efficient charge transfer, outperforming TzTz-CMP-Be in selective oxidation reactions.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Zonglin Weng, Yuanfang Lin, Siyuan Guo, Xinfei Zhang, Qin Guo, Yu Luo, Xinwen Ou, Jinxing Ma, Yang Zhou, Jin Jiang, Bin Han
Summary: In this study, the precise regulation of reactive oxygen species generation in peroxymonosulfate-based advanced oxidation processes (AOPs) was achieved by controlling the sites in covalent organic frameworks (COFs). The introduction of bipyridine units in COFs enabled the selective activation of peroxymonosulfate to produce singlet oxygen with enhanced degradation performance for target pollutants.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Zhenhua Sun, Jing Li, Xuejiang Wang, Yanan Zhang, Siqing Xia
Summary: This study investigates a novel method for nonradical oxidation degradation of sulfamethoxazole using peroxymonosulfate activated by MgFe2O4/MgO modified biochar. The nonradical oxidation process is dominated by 1O2 and is not affected by interference from coexisting ions and different water matrices. The research provides insights into the mechanism of nonradical oxidation and electron transfer processes among peroxymonosulfate, oxygen, and catalyst.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jing Wang, Qingfeng Fan, Lidong Kou, Huan Chen, Xing Xing, Wenjie Duan, Kai Jiang
Summary: In this study, a photocatalytic textile was prepared by spraying heterostructures of oxygen vacancies (OVs)-rich bismuth oxide (BiO2-x) and urea-derived graphitic carbon nitride (UCN) on a modified poly(acrylonitrile) nonwoven textile (APAN). The photocatalytic textile showed excellent activity for sulfamethazine (SMT) removal and bacterial disinfection under white light emitting diodes (LEDs) irradiation. The enhanced photocatalytic performance was attributed to the formation of oxygen vacancies and heterostructures.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Ran Long, Yu Li, Li Song, Yujie Xiong
Article
Chemistry, Multidisciplinary
Ran Long, Yu Li, Yan Liu, Shuangming Chen, Xusheng Zheng, Chao Gao, Chaohua He, Nanshan Chen, Zeming Qi, Li Song, Jun Jiang, Junfa Zhu, Yujie Xiong
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2017)
Article
Chemistry, Multidisciplinary
Yu Li, Shuangming Chen, Dawei Xi, Yanan Bo, Ran Long, Chengming Wang, Li Song, Yujie Xiong
Article
Chemistry, Multidisciplinary
Yanan Bo, Haiyun Wang, Yunxiang Lin, Tian Yang, Run Ye, Yu Li, Canyu Hu, Pengye Du, Yangguang Hu, Zhi Liu, Ran Long, Chao Gao, Bangjiao Ye, Li Song, Xiaojun Wu, Yujie Xiong
Summary: This study introduces Fe dopants into TiO2 nanofibers to stabilize oxygen vacancies and tune their local electronic structure, shifting the hydrogenation of N-2 from an associative alternating pathway to an associative distal pathway. This approach provides new insights for efficiently controlling reaction pathways towards photocatalytic nitrogen fixation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Dawei Xi, Jiayi Li, Jingxiang Low, Keke Mao, Ran Long, Jiawei Li, Zehui Dai, Tianyi Shao, Yuan Zhong, Yu Li, Zibiao Li, Xian Jun Loh, Li Song, Enyi Ye, Yujie Xiong
Summary: Carbon-supported Ni single-atom catalysts with precisely controlled single-atom structure achieved through joule heating strategy show superior performance in electrocatalytic carbon dioxide reduction reaction, with 80% of N dopants coordinated with metal elements, thereby avoiding unfavorable N species and demonstrating unprecedented activity, selectivity, and stability.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Cuizhu Huo, Xinxing Cao, Zixian Ye, Yu Li, Tongbu Lu
Summary: A hierarchical bimetallic electrocatalyst was developed for efficient electroreduction of CO2 to C1 products, achieving an unprecedented partial current density and high Faradaic efficiency. The strategy of integrating optimized structure with active site may benefit other related energy conversion systems.
Article
Nanoscience & Nanotechnology
Pei-Pei Luo, Xin-Ke Zhou, Yu Li, Tong-Bu Lu
Summary: This study reports a defect-engineering strategy that selectively converts CH4 to formaldehyde through aerobic photocatalytic reactions without the use of noble-metal cocatalysts. The optimized oxygen-vacancy-rich surface disorder layer on TiO2 promotes charge carrier separation and migration, enhances the activation of O-2 and CH4, and synergistically boosts formaldehyde production. This work sheds light on the mechanism of O-2-participated photocatalytic CH4 conversion and expands the application of defect engineering in designing low-cost and efficient photocatalysts.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yu Li, Cui-Zhu Huo, Hong-Juan Wang, Zi-Xian Ye, Pei-Pei Luo, Xin-Xing Cao, Tong-Bu Lu
Summary: A hierarchical bifunctional CuSn alloy electrocatalyst is developed for efficient production of formate through the simultaneous cathodic CO2RR and anodic MOR reactions, achieving a record-high production rate with nearly 100% selectivity. The coupling of CO2RR with MOR requires a lower electricity input compared to CO2RR coupled with conventional oxygen evolution reaction, making it a promising avenue for electrosynthesis.
Article
Nanoscience & Nanotechnology
Xin-Ke Zhou, Yu Li, Pei-Pei Luo, Tong-Bu Lu
Summary: We report an effective surface engineering strategy for TiO2 nanosheets, where concurrent constructions of oxygen vacancies and phosphate sites address the poor efficiency problem in the photocatalytic conversion of CH4 into liquid oxygenates. The surface oxygen vacancies and phosphates play roles as acceptors of photogenerated electrons and holes, promoting the separation and migration of charge carriers. In addition to activating O2 to (OH)-O- by electrons at oxygen vacancies, the surface phosphates effectively adsorb H2O via hydrogen bonds, facilitating the transfer of holes to H2O for enhanced (OH)-O- production and boosting CH4 conversion.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Yu Li, Tong-Bu Lu
Summary: Converting CO2 into chemicals using renewable electricity can achieve carbon neutrality by lowering cell voltage and increasing output value. This review summarizes the recent breakthroughs in combining CO2 reduction reactions with various anodic oxidation reactions and identifies major challenges and future prospects.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Bing-Cai He, Chao Zhang, Pei-Pei Luo, Yu Li, Tong-Bu Lu
Article
Chemistry, Physical
Liang-Liang Yang, Hong-Juan Wang, Juan Wang, Yu Li, Wen Zhang, Tong-Bu Lu
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
Review
Chemistry, Multidisciplinary
Y. Li, C. Gao, R. Long, Y. Xiong
MATERIALS TODAY CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Fei Hu, Shengli Zhu, Shuangming Chen, Yu Li, Lu Ma, Tianpin Wu, Yan Zhang, Chengming Wang, Congcong Liu, Xianjin Yang, Li Song, Xiaowei Yang, Yujie Xiong
ADVANCED MATERIALS
(2017)