Article
Environmental Sciences
Hyelyeon Tak, Youngkun Chung, Ga-Yeong Kim, Hyojeon Kim, Jiseon Lee, Jungwan Kang, Quoc Cuong Do, Byung-Uk Bae, Seoktae Kang
Summary: DEHP, a common plastic additive, is known for its high leaching potential and harmful effects on both human and the ecosystem. The use of vanadium oxide (V2O5)-incorporated TiO2 (V2O5/TiO2) catalyst has been found to enhance the degradation efficiency and removal rate of DEHP, with a fast degradation kinetic constant.
Article
Chemistry, Physical
Yiqing Li, Manqin Fu, Xiaoxia Zhang, Chun He, Dingsheng Chen, Ya Xiong, Liqing Guo, Shuanghong Tian
Summary: In this study, CuOx nanoclusters supported on anatase TiO2 nanotubes (NT) were successfully prepared, showing high reactivity in catalytic applications. CuOx/NT catalyst demonstrated a higher reaction rate constant in ozonation compared to NT catalyst and ozonation alone, and it generated abundant reactive oxygen species. The results provide valuable insights for designing and preparing highly reactive nanoclusters of metal oxide catalysts for catalytic ozonation of refractory organic pollutants.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Jianping Shang, Yu Jiang, Xiaoping Qin, Bin Zhao, Xuefei Li
Summary: The study modified attapulgite to prepare TiO2/ATP nanocomposite with high catalytic activity for the treatment of printing and dyeing wastewater, showing efficient degradation of methylene blue. Detailed research has been conducted on reaction conditions and kinetics.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)
Article
Engineering, Environmental
Xiangtong Kong, Shikha Garg, Mahshid Mortazavi, Jinxing Ma, T. David Waite
Summary: This study presents the preparation and performance of an Al2O3-supported Fe catalyst for heterogeneous catalytic ozonation (HCO). The NS-Fe-Al2O3 catalyst demonstrated significantly improved removal of organic pollutants compared to conventional catalysts. It also exhibited resistance to inhibitory effects of chloride and sulfate ions commonly found in industrial effluents.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Ana Amic, Denisa Mastil'ak Cagardova
Summary: This study theoretically examined the inactivation potency of quercetin and flavonoid catecholic metabolites 1-5 on HOO center dot, CH3OO center dot, and O-2(center dot-) under physiological conditions. The results showed that the catecholic moiety of quercetin and metabolites 1-5 played a crucial role in scavenging HOO center dot and CH3OO center dot. Metabolites 1 and 5 were identified as the most potent scavengers of HOO center dot and CH3OO center dot, respectively. Quercetin exhibited higher potency in inactivating HOO center dot and CH3OO center dot via single electron transfer. The SET reaction from the 3-O-phenoxide anion of quercetin represented the most contributing reaction path. Furthermore, all polyphenolic compounds studied showed potency in inactivating O-2(center dot-) through a concerted two-proton-coupled electron transfer mechanism. These findings suggest that metabolites with high radical scavenging potency and enhanced bioavailability may contribute to the health-promoting effects attributed to parent molecules.
Article
Materials Science, Ceramics
Jinze Lyu, Xian Zhang, Lingling Tang, Ziyi Zhong, Zhizhang Shen, Ji Li
Summary: Solar-light-assisted catalytic ozonation has the advantages of low energy consumption and high removal rate, making it suitable for large-scale industrial VOC control. However, the multiple processes involved in this method, such as photocatalysis, photothermal conversion, thermal catalysis, and ozonation, pose challenges in understanding their contribution and interaction mechanisms. In this study, PtOx-loaded CeO2 was used as a model catalyst to analyze the synergistic mechanism of photochemical and photothermal processes. The results revealed that the degradation of toluene by these processes was initiated by O3 decomposition. PtOx loading improved the photothermal conversion efficiency without affecting the thermocatalytic activity. The photochemical process was dominated by electron-O3 transfer at the PtOx-CeO2 interface. PtOx also enhanced hole transfer to H2O, thereby promoting charge separation. These findings provide detailed information about the behavior of charge carriers at the catalyst interface during catalytic ozonation.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Yuting Yuan, Shikha Garg, Jinxing Ma, T. David Waite
Summary: In this study, copper aluminum layered hydroxides and copper oxide were used as catalysts for heterogeneous catalytic ozonation, targeting the removal of oxalate and formate contaminants. The role of the catalyst in contaminant removal was elucidated, with Cu-Al LDHs facilitating slow decay of O-3 to form surface hydroxyl radicals, while CuO rapidly transforms O-3 into surface-located hydroxyl radicals and/or other oxidants. Futile consumption of surface-located oxidants via interaction with the catalyst surface was minimal for Cu-Al LDHs, but becomes significant with higher CuO dosages.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Lucrezia Angeli, Ksenia Morozova, Matteo Scampicchio
Summary: This study proposes a rapid and sensitive method for determining the absolute rate constant of the reaction between fast antioxidants and DPPH center dot. The method involves a stopped-flow spectrophotometric system that monitors the decay of DPPH center dot during its interaction with antioxidants. Kinetic parameters including second order kinetics and side reactions were determined for various antioxidants. Overall, this method is simple, rapid, and suitable for studying the activity and capacity of different molecules, as well as food samples rich in fast antioxidants like fruit juices.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Wei Qu, Zhuoyun Tang, Su Tang, Hailin Wen, Jingyun Fang, Qiyu Lian, Dong Shu, Chun He
Summary: Co3O4 spinel is a promising catalyst for the catalytic ozonation of VOCs. NiCo2O4 catalyst derived from metal-organic frameworks shows improved performance in removing CH3SH, while Mg-substituted Co3O4 catalyst shows reduced performance. The substitution of Ni and Mg into the Co3O4 spinel alters the surface properties and enhances the adsorption and activation of ozone (O-3), leading to efficient CH3SH removal.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Savvina Psaltou, Efthimia Kaprara, Konstantinos Triantafyllidis, Manassis Mitrakas, Anastasios Zouboulis
Summary: This study evaluated the role of PZC and wettability of catalysts in the heterogeneous catalytic ozonation process. Results showed that catalysts with high wettability and neutral to slightly positive surface charge led to enhanced degradation of pollutants, while materials with strongly negative or positive surface charge and low wettability decreased the production of hydroxyl radicals. Ozone's affinity with catalyst surfaces and production of hydroxyl radicals were found to depend on surface charge and wettability, highlighting the importance of these parameters in the process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Lilong Zhou, Shenghao Wang, Zhengjie Li, Xuepu Cao, Runjing Liu, Jimmy Yun
Summary: CaO has been used as a catalyst and precipitant for the treatment of organic phosphorous wastewater by catalytic ozonation. It shows excellent catalytic performance for the removal of COD and can also remove the generated PO33. Ca2+ can catalyze the reaction between O-3 and H2O to generate active oxygen species. The conditions for the degradation of THPS wastewater by catalytic ozonation over CaO have been optimized, and excess Ca2+ can be removed by the addition of CO2.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Van-Re Le, Thanh-Binh Nguyen, Chiu-Wen Chen, C. P. Huang, Xuan-Thanh Bui, Cheng-Di Dong
Summary: A catalyst GQDs@MnOOH was synthesized to enhance the catalytic ozonation of the antibiotic ciprofloxacin (CIP). The GQDs@MnOOH/O3 system showed the highest CIP removal effectiveness compared to MnOOH/O3 and O3 only. The degradation of 0.02 mM CIP reached 99.9% efficiency in 30 min using 9.6 mg L-1 of O3 catalyzed by 12.5 mg L-1 of GQDs@MnOOH. The GQDs@MnOOH enhanced CIP degradation and inhibited the formation of BrO3- in different water sources. Oxygen radical (O2 center dot-), singlet oxygen (1O2), and hydroxyl radicals (center dot OH) were involved in CIP degradation by the GQDs@MnOOH/O3 system.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Abrar Inayat, Lisandra Rocha-Meneses, Muhammad Ayoub, Sami Ullah, Ahmad Z. Abdullah, Salman R. Naqvi, Aamir H. Bhat
Summary: This study explores the impact of different Co3O4-based catalysts on the catalytic decomposition of nitrous oxide (N2O) and the conversion of nitric oxide (NO). The results indicate that Co3O4 catalysts prepared through precipitation methods exhibit the highest activity and N2O conversion, even at low reaction temperatures, while commercial nano and powder forms of Co3O4 (CS) perform the poorest. The catalysts lose effectiveness below 400 degrees C, with their activity being greatly influenced by the mixing temperature. The findings offer valuable insights for designing and optimizing catalytic systems for N2O and NO control.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Zhiman Zhang, Fawei Lin, Li Xiang, Hongdi Yu, Zhihua Wang, Beibei Yan, Guanyi Chen
Summary: The bimetallic MnCoOx catalysts synthesized in this study showed efficient degradation of chlorobenzene and nitrogen oxides at high temperatures, exhibiting excellent performance. The presence of NO had little impact on CB conversion but increased the mineralization rate. Introduction of SO2 and DCE promoted ozone reactions, while the presence of H2O and PhH had opposite effects.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Yi Jiang, Qing Wang, Xinchao Wen, Yongbo Yu, Jianfeng Dai
Summary: This study introduced rGO into QDSSC photoanodes to enhance performance by optimizing the built-in electric field in the electrode, leading to a significant improvement in power conversion efficiency.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Engineering, Environmental
Fanyu Meng, Lina Guo, Haocheng Zou, Boming Zhu, Fayang Zhou, Yiqing Zeng, Jiayou Han, Jun Yang, Shule Zhang, Qin Zhong
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Chemistry, Physical
Xiaohai Li, Zihua Wu, Yiqing Zeng, Jiayou Han, Shule Zhang, Qin Zhong
CHEMICAL PHYSICS LETTERS
(2020)
Article
Chemistry, Physical
Fanyu Meng, Mingjia Zhang, Fayang Zhou, Haocheng Zou, Boming Zhu, Yiqing Zeng, Shule Zhang, Qin Zhong
Summary: Ligand-assisted impregnation method was used to prepare CrOx/black-TiO2 catalysts, which showed enhanced interaction between CrOx and oxygen vacancies/O-Ti-O structures. Modification by citric acid increased the content of Cr3+ and chemical adsorption oxygen, promoting the adsorption ability of O-2 and enhancing the adsorption capacity of NO, synergistically promoting NO oxidation.
Review
Chemistry, Physical
Yiqing Zeng, Kok-Giap Haw, Yanan Wang, Shule Zhang, Zhigang Wang, Qin Zhong, Sibudjing Kawi
Summary: NH3-SCR is an important method to reduce NOx emissions, with CeO2-TiO2 catalysts gaining attention for their excellent performance. This review summarizes recent studies on CeO2-TiO2 catalysts, focusing on the impact of modification strategies on catalytic performance.
Article
Chemistry, Physical
Plaifa Hongmanorom, Jangam Ashok, Guanghui Zhang, Zhoufeng Bian, Ming Hui Wai, Yiqing Zeng, Shibo Xi, Armando Borgna, Sibudjing Kawi
Summary: Ni and Ni-Mg phyllosilicate mesoporous SBA-15 catalysts prepared via ammonia evaporation (AE) method exhibit superior catalytic performance in CO2 methanation compared to catalysts prepared via wetness impregnation (WI) method, due to enhanced metal-support interaction and weakly basic sites provided by surface hydroxyl groups. Incorporation of Mg into phyllosilicate structure increases medium basic sites, promoting monodentate formate formation and improving CO2 methanation activity. Additionally, the turnover frequency of CO2 conversion is correlated with the concentration of basic sites, and the strong metal-support interaction and confinement effect of SBA-15 can suppress metal sintering, ensuring good stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Yiqing Zeng, Kok-Giap Haw, Zhigang Wang, Yanan Wang, Shule Zhang, Plaifa Hongmanorom, Qin Zhong, Sibudjing Kawi
Summary: A novel double redox method was developed to synthesize highly active CuO-CeO2 (CuCe-DR) catalyst, which exhibits higher Ce3+ and Cu2+ ion concentrations and stronger Cu-Ce interaction compared to CuCe-C catalyst. CuCe-DR catalyst shows higher toluene oxidation performance and stability at low temperatures, attributed to the increased surface chemisorbed oxygen and improved redox properties.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Yiqing Zeng, Yanan Wang, Plaifa Hongmanorom, Zhigang Wang, Shule Zhang, Jiatang Chen, Qin Zhong, Sibudjing Kawi
Summary: In this study, a highly efficient P-doped CeO2/TiO2 catalyst was constructed, showing higher catalytic activity and stability compared to traditional catalysts. By controlling the P/Ti ratio and CeO2 loading content, a balance between surface acid sites and redox sites can be achieved to obtain the best catalytic performance. This work provides a feasible method for designing CeO2/TiO2-based catalysts with optimized surface properties for enhanced catalytic activity.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Fanyu Meng, Shule Zhang, Yiqing Zeng, Mingjia Zhang, Haocheng Zou, Qin Zhong, Yuntao Li
Summary: This study proposed an efficient method for NO oxidation using F/TiO2 surface fluorine catalyzing the conversion of O-3 and H2O2 into radicals. The results showed NO oxidation rate exceeding 96% under specific molar ratios and demonstrated good stability and resistance to different gas compositions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Li Huang, Yiqing Zeng, Zhengfeng Chang, Yuhao Zong, Hu Wang, Shule Zhang, Yang Yu
Summary: In this study, the resistance of commercial V-Mo/Ti catalyst to alkali metals poisoning was improved by incorporating phosphorous species, resulting in enhanced NH3-SCR activity.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Fanyu Meng, Lina Guo, Jianyu He, Zhongyu Wang, Zhiguo Ma, Yiqing Zeng, Shule Zhang, Qin Zhong
Summary: The study focuses on the catalytic ozonation of NO by V-based catalysts, particularly the VF1 catalyst, which showed the highest efficiency in NO oxidation. The transformation of VFx catalysts from V2O5 to (NH4)(2)V6O16·1.5H2O species was observed, with increased surface roughness and enhanced catalytic activity. Additionally, the presence of SO2 was found to be beneficial for NO2 removal in this system, while reaction temperature had minimal impact on NO oxidation efficiency.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Chemistry, Physical
Bin Yang, Mingjia Zhang, Yiqing Zeng, Fanyu Meng, Jiangquan Ma, Shule Zhang, Qin Zhong
Summary: The study found that fluorine-modified cerium oxide catalyst exhibited higher catalytic activity in toluene oxidation, attributed to the increased oxygen vacancy concentration, enhanced oxygen adsorption capacity, and presence of more active oxygen on the catalyst surface.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Physical
Yong Jia, Mingyan Huang, Jing Yuan, Lina Guo, Yiqing Zeng, Fuping Qian, Shule Zhang
Summary: The study found that the SCR activity of VPO/TiO2 catalyst at low temperature is closely related to the acidity level of the catalyst surface, and is positively correlated with the content of weak Lewis acid centers.
Article
Engineering, Environmental
Mingjia Zhang, Fanyu Meng, Shule Zhang, Yiqing Zeng, Qin Zhong
Summary: Sulfur-doped TiO2 shows promising catalytic performance in the peroxone reaction between O3 and H2O2, effectively increasing NO conversion rate and exhibiting good stability and poison resistance for potential practical applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Jiahua Xie, Mengyu Li, Zihua Wu, Yiqing Zeng, Shule Zhang, Jing Liu, Qin Zhong
Summary: Activated coke-based catalysts have shown excellent performance in denitration by selective catalytic reduction by NH3, especially at low temperatures. The pre-oxidation process of V2O5/AC catalyst was found to significantly enhance its NH3-SCR activity by promoting the formation of surface-active oxygen species, leading to higher NOx conversion efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Hao Gu, Yiqing Zeng, Shipeng Wan, Shule Zhang, Qin Zhong, Yunfei Bu
Summary: A three-dimensional NS@NCCH tree-like core-shell microarray was designed and fabricated for high-performance flexible supercapacitors. The electrode exhibited high capacity and rate performance, as well as excellent cycling stability, attributed to the optimized core-shell structure and substrate material. Moreover, it was assembled into a flexible all-solid-state asymmetric supercapacitor with negligible electrochemical property attenuation even under severe bending or twisting.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Engineering, Chemical
Andrea Coletto, Pietro Poesio
Summary: Experiments and simulations were conducted to study the air volume fraction and hold-up in a bubble channel reactor. A new signal processing method was proposed to avoid the loss of bubble residence time. The results were in agreement with previous studies and a bubble-scale model was developed to explain the relationship between hold-up and air superficial velocity.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2024)