Article
Chemistry, Multidisciplinary
Yuhua Zhu, Leyi Yang, Jiami Ma, Yarong Fang, Ji Yang, Xiaoping Chen, Juan Zheng, Shuhong Zhang, Wei Chen, Chuanqi Pan, Baojian Zhang, Xiaofeng Qiu, Zhu Luo, Jinlong Wang, Yanbing Guo
Summary: In this study, the role of water activation and the mechanism of promoted O-3 decomposition over MoO3/GDY catalyst were elaborated. It was found that MoO3/GDY achieved 100% O-3 decomposition under high humid conditions (75% RH) at room temperature, which was 4.0 times higher than that under dry conditions, surpassing other carbon-based MoO3 materials (<= 7.1%). The sp-hybridized carbon in GDY donated electrons to MoO3, facilitating water activation and leading to the generation of new active sites that promoted O-3 adsorption and the formation of intermediate species.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Environmental Sciences
Guanqing Song, Gansheng Shi, Lu Chen, Xiao Wang, Jing Sun, Lei Yu, Xiaofeng Xie
Summary: The synergistic control of ozone and fine particulate matter is an important research topic in the field of environmental studies. This study focused on the degradation of ozone pollutants using MIL-100(Fe) and MIL-100(Mn) materials. The results showed that MIL-100(Fe) exhibited superior photocatalytic activity, while MIL-100(Mn) had better catalytic efficiency at normal temperatures. The optimal photocatalytic performance of MIL-100(Fe) was observed at 10% humidity, while MIL-100(Mn) showed consistent catalytic degradation efficiency at humidity levels ranging from 10% to 90%. The degradation mechanism was proposed based on in-situ DRIFTS and ESR analysis, which were correlated with oxygen vacancy and photogenerated electron efficiency. Temperature Programmed Desorption (TPD) analysis detected a large number of Lewis acid sites in MIL-100(Mn), which contributed to its excellent performance in normal temperature degradation under high humidity. This work expands the practical application of ozone removal and improves degradation efficiency.
Article
Multidisciplinary Sciences
Yuguang Pu, Duncan Moseley, Zhen He, Krishna Chaitanya Pitike, Michael E. Manley, Jiaqiang Yan, Valentino R. Cooper, Valerie Mitchell, Vanessa K. Peterson, Bernt Johannessen, Raphael P. Hermann, Peng Cao
Summary: Researchers have developed a bottom-up method for synthesizing rocksalt high-entropy oxides (HEOs) containing Mn and Fe. They investigated the crystal structure and random cation-site occupancy of FeO-HEO, showing improved structural robustness and the viability of an oxygen sublattice as a buffer layer. Compositional analysis revealed the valence and spin state of the iron species, and the antiferromagnetic order of FeO-HEO below a transition temperature around 218 K was reported, along with predictions for the phase stability conditions of Mn and Fe-containing HEOs.
Article
Environmental Sciences
Manning Zhang, Dulin Yin, Jinjin Guo, Huanghe Wu, Meiling Gong, Xiangdong Feng
Summary: The novel Mn-Fe-Ce/Al2O3 ternary catalyst showed improved removal rate and mineralization degree of phenol pollutants, accelerating the decomposition of ozone into hydroxyl radicals and oxidation of phenol. The catalytic activity was attributed to the high surface hydroxyl density as the active site, and the accelerated electron transfer through redox cycles of Mn2+-Mn3+-Mn4+, Fe2+-Fe3+, and Ce3+-Ce4+ shown in XPS analysis. Additionally, the catalyst maintained high catalytic activity after multiple cycles of use, making it an efficient and promising catalyst for catalytic ozonation system.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Weijie Yang, Jianuo Ren, Jiajia Li, Hanwen Zhang, Kai Ma, Qingwu Wang, Zhengyang Gao, Chongchong Wu, Ian D. Gates
Summary: This study explores the catalytic mechanism of Fe-Co double-atom catalyst in ozone decomposition through molecular dynamics simulations and density functional theory calculations, confirming its water resistance and feasibility of ozone decomposition at low temperatures.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Le Zhang, Jiawei Yang, Anqi Wang, Shaohua Chai, Jian Guan, Linfeng Nie, Guijun Fan, Ning Han, Yunfa Chen
Summary: The study found that the synthesis of (Mn,Co)(3)O-4 catalyst can accelerate the decomposition of ozone, thereby improving efficiency. The synergy between Mn and Co in the reaction can promote the rate-determining steps.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Lei Guo, Ming Zhang, Shuqian Xie, Zhiqiang Xiao, Wenquan Sun, Yanhua Xu, Jun Zhou, Yongjun Sun
Summary: In this study, a salt-tolerant Fe-Bi@γ-Al2O3 catalyst was prepared and its catalytic performance and mechanism in treating high-salinity organic wastewater were investigated.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Hong Liang, Kaibin Zhang, Qiang Zheng, Qingchun Wang, Hong Huang, Li Wang
Summary: A series of cerium precursor-doped MnOx catalysts were synthesized by hydrothermal method and characterized. The choice of cerium precursor had significant effects on the structural and catalytic properties of the catalysts, and all cerium precursors doped with manganese oxides improved the ozone decomposition activity of the catalysts at high humidity. Manganese oxide doped with ammonium ceric nitrate as precursor exhibited the best ozone degradation effect.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Chemistry, Multidisciplinary
Hao Li, Yunhe Li, Mengyu Liu, Penghui Wang, Baogang Zhao, Tianjun Sun
Summary: A simple co-precipitation method was used to synthesize Cu/Mn catalysts with different physicochemical properties for ozone decomposition under high humidity conditions. The activity and stability of the catalysts were tested, and their physical and chemical properties were analyzed. Characterization after stability testing provided insights into the mechanism of the ozone reaction process. The Cu/Mn-NN catalyst displayed excellent ozone decomposition activity, maintaining a conversion rate above 91% for 12 hours at room temperature, RH 85%, and weight space velocity of 300 L g(-1) h(-1).
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Review
Environmental Sciences
Jingjing Wang, Shijie Yuan, Xiaohu Dai, Bin Dong
Summary: An increasing number of novel organic contaminants pose challenges for water treatment technology. Advanced oxidation processes based on ozone offer advantages in treating refractory organic contaminants. Biochar has gained attention in wastewater treatment due to its porous structure, portable preparation, and stability. Iron species are commonly used in catalytic ozonation due to their magnetic polarization, abundance, and low cost. However, there is a lack of comprehensive research on Fe-loaded biochar in heterogeneous catalytic ozonation. This review aims to introduce the progress and explore mechanisms and detection techniques for Fe-based catalysts and Fe-loaded biochar in catalytic ozonation.
Article
Engineering, Environmental
L. Jothinathan, Q. Q. Cai, S. L. Ong, J. Y. Hu
Summary: The novel Fe-Mn/PAC pellet prepared by a sol-gel method displayed enhanced removal efficiency of COD and phenol in phenolic wastewater during microbubble ozonation, with a high ozone conversion rate. The Fe-Mn/PAC pellet also significantly increased the exposure of hydroxyl radicals and promoted their generation, leading to reduced ozone consumption and a lower ratio of ozone consumption to COD removal.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Hong Liang, Qiang Zheng, Kaibin Zhang, Youli Yang, Ran He
Summary: Mesoporous 10CeOx/MnOx-Y catalysts were prepared by doping Ce and calcining Mn-BTC for ozone catalytic decomposition. The 10CeOx/MnOx-300 catalyst showed the highest catalytic activity under the RH range of 5-65%, achieving 100% conversion of 40 ppm O3 after 6 h. Physicochemical characterizations revealed that the 10CeOx/MnOx-300 catalyst had the highest Mn3+/Mn4+ and Oads/Olatt ratios, as well as the largest specific surface area, contributing to efficient ozone decomposition.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Engineering, Environmental
Fangxie Shen, Xiang Wan, Lijing Wang, Chunning Zhao, Shen Zhang, Anqi Dong, Kai Shi, Haijun Zhang, Xiaomeng Zhou, Kunpeng He, Yinchang Feng, Weichao Wang
Summary: This study presents a manganese-based strategy for efficient removal of indoor formaldehyde pollution using a mullite catalyst and ozone. The method shows high efficiency even under large ambient temperature changes and does not produce secondary pollutants.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Shi-Qi Tian, Jing-Yao Qi, Yun-Peng Wang, Yu-Lei Liu, Lu Wang, Jun Ma
Summary: Biochar loaded with manganese and iron showed excellent catalytic ozonation activity, effectively removing atrazine with hydroxyl radicals as the main oxidant. The enhanced adsorption and decomposition of O-3 on the loaded biochar led to improved degradation pathways of atrazine, reducing toxicity of oxidation products significantly. This research indicates the great potential of Mn-loaded and Fe-loaded biochar for heterogeneous catalytic ozonation in water pollution treatment.
Article
Engineering, Environmental
Peng Lu, Lyumeng Ye, Xianhui Yan, Xiongbo Chen, Ping Fang, Dongyao Chen, Dingsheng Chen, Chaoping Cen
Summary: This study investigated the impact of toluene on the N2O formation mechanism, revealing its inhibitory effect on N2O generation from both NH3 oxidation and NSCR pathways.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Hua Deng, Yuqin Lu, Tingting Pan, Lian Wang, Changbin Zhang, Hong He
Summary: A novel manganese oxide catalyst was developed by incorporating different metals, showing flexible activity in the removal of various volatile organic compounds. The addition of different metal ions resulted in their uniform dispersion in the catalyst and improved catalytic activity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Qian Zhao, Yan Zhang, Qingling Liu, Chunfeng Song, Xuebin Lu, Jinzhu Ma, Lian Wang, Hong He
Summary: Sample morphology has a significant influence on catalytic performance by affecting key properties of catalysts such as active sites, oxygen vacancies, and active oxygen species. In this study, MnO2 was grown on platelike CoAlO and flowerlike CoAlO for volatile organic compounds oxidation, with platelike MnO2/CoAlO-P showing good stability and water resistance. The modification of CoAlO-P with MnO2 led to the exposure of Co species and weak Co-O bond, facilitating acetone adsorption and activation. The oxygen vacancy generated on MnO2/CoAlO-P dissociated O2 into active oxygen species, promoting the conversion of intermediate species into CO2 and H2O. This research provides insights for the rational design of catalysts in hydrocarbon oxidation reactions.
Review
Environmental Sciences
Qingxin Ma, Chunyan Zhang, Chang Liu, Guangzhi He, Peng Zhang, Hao Li, Biwu Chu, Hong He
Summary: The oxidation of sulfur dioxide (SO2) to sulfate in the atmosphere is important but controversial. Heterogeneous oxidation process on particle surfaces is considered an important missing mechanism in current models. This review summarizes the fundamental understanding of the heterogeneous reactions of SO2 on solid particles and discusses the factors affecting these reactions, as well as providing recommendations for future research.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Muhammad Naveed, Hong S. He, Shengwei Zong, Haibo Du, Zulqarnain Satti, Hang Sun, Shuai Chang
Summary: With the increasing population on Earth, the demand for agricultural raw materials also rises. It is crucial to have updated and accurate information about the dynamics and properties of world agricultural systems. Monitoring the spatial distribution of cotton fields is necessary for tracking crop area and growth changes at a regional level. In our study, we used an enhanced vegetation index time series and a probabilistic approach to detect cotton crop area. We also employed Gaussian kriging and field data validation to estimate cotton yield. Our findings show a strong correlation between the MODIS-derived cotton area and statistical data, with high accuracy in both crop area detection and yield prediction. Our approach can be applied to other regions through machine learning.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Engineering, Environmental
Peng Zhang, Yonghong Wang, Tianzeng Chen, Yunbo Yu, Qingxin Ma, Changgeng Liu, Hao Li, Biwu Chu, Hong He
Summary: The heterogeneous oxidation of SO2 by NO2 has been extensively studied in the context of haze events in China. However, there is still limited understanding of the kinetics and mechanism of this reaction on complex particles. In this study, the reaction between SO2 and NO2 on diesel black carbon (DBC) under light irradiation was investigated. Experimental results showed that DBC photochemistry promoted the reduction of NO2 and the formation of OH radicals, leading to the oxidation of SO2. It was found that the surface photo-oxidation pathway accounted for the majority of the SO2 uptake.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
An Ning, Jie Zhong, Liwen Li, Hao Li, Jiarong Liu, Ling Liu, Yan Liang, Jing Li, Xiuhui Zhang, Joseph S. Francisco, Hong He
Summary: This paper presents molecular-level evidence that the air-water interfacial reaction of I2O4 mediated by potent atmospheric chemicals can occur rapidly. The identified mechanisms exhibit the dual contribution to aerosol growth and provide an explanation for the missing source of certain ions in marine aerosols.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jianhua Liu, Guangyan Xu, Qi An, Yingjie Wang, Yunbo Yu, Hong He
Summary: In this study, Pt/Al2O3 catalysts were synthesized and the state of Pt species was adjusted by heat treatment. The characterization results showed that high-temperature treatment induced the aggregation of platinum species to form metallic Pt nanoparticles. These high-temperature treated Pt/Al2O3 catalysts exhibited superior activity and water tolerance in the NH3-SCO reaction.
Article
Meteorology & Atmospheric Sciences
Junlei Zhan, Wei Ma, Boying Song, Zongcheng Wang, Xiaolei Bao, Hong-Bin Xie, Biwu Chu, Hong He, Tao Jiang, Yongchun Liu
Summary: We observed a significant wintertime O-3 pollution event in Shijiazhuang during the Chinese New Year in 2021. The change in wind direction due to a sudden change in air pressure promoted the accumulation of air pollutants from neighboring areas and hindered the diffusion of local pollutants. Volatile organic compounds (VOCs), particularly ethene, propene, toluene, and xylene, were found to play a key role in O-3 formation. Industrial combustion was identified as the largest source of O-3 production, and strict control measures in the industry should be implemented for pollution control.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
Review
Engineering, Biomedical
Chen Zong, Annelies Bronckaers, Guy Willems, Hong He, Maria Cadenas de Llano-Perula
Summary: Bioactive nanomaterials have great potential in periodontal tissue regeneration and have improved oral health in translational and clinical applications. This article reviews recent advancements in nanomaterials for periodontal tissue regeneration and discusses future research directions, focusing on improving oral health. Biomimetic and physiochemical properties of nanomaterials are described, including their effects on alveolar bone, periodontal ligament, cementum, and gingiva regeneration. The safety issues and potential complications of using nanomaterials as regenerative materials are also discussed.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Chemistry, Physical
Shuyu Liang, Tianyu Zhang, Yue Zheng, Tianshan Xue, Zheng Wang, Qiang Wang, Hong He
Summary: Increasing the accessibility of active sites can enhance electrocatalytic activity. Single-atom catalysts claim to achieve 100% atomic utilization but may have buried and inaccessible single-atom sites in practice. This study compares two Ni, N-doped carbon catalysts and shows that the Ni-Nx/Carbon black catalysts with lower Ni loading exhibit higher activity for CO production due to the exposed and utilized single-atom sites. The work highlights the significance of increasing the utilization of single-atom sites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Jinhan Lin, Xueyang Hu, Yingjie Li, Wenpo Shan, Xuechao Tan, Hong He
Summary: In this study, the influence of Cu content and Cu species on the catalytic performance and hydrothermal stability of Cu-LTA zeolite catalysts for NOx reduction was investigated. The results showed that maximizing the amount of Cu2+-2Z species and minimizing the formation of vulnerable [Cu (OH)]+-Z species in high-silica LTA zeolite is an effective strategy for developing hydrothermally stable NH3-SCR catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Agriculture, Multidisciplinary
Bo Li, Lijie Qin, Hang Qi, Jianqin Wang, Yongcai Dang, Mingzhu Lv, Hongshi He
Summary: This study quantitatively evaluated the impacts of drought on crop water use in Jilin Province using water footprint (WF) and standardized precipitation evapotranspiration index (SPEI) calculated by remote sensing approaches. The results showed that drought not only affected the source and structure of agricultural water consumption, but also had different effects on WF values at different time scales.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Chemistry, Physical
Jinpeng Du, Shichao Han, Chi Huang, Yulong Shan, Yan Zhang, Wenpo Shan, Hong He
Summary: Cu-SSZ-39 zeolites were prepared using different precursors, and Cu2.5-SSZ-39-Z prepared using ZSM-5 showed the highest atomic utilization and particle size. Cu2.5-SSZ-39-Z exhibited the best low-temperature NH3-SCR activity and hydrothermal stability, making it a preferred precursor for industrial preparation of Cu-SSZ-39 zeolite.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Jie Cheng, Ruinian Xu, Liyun Song, Hong He, Biaohua Chen
Summary: Supported V2O5@AC catalysts synthesized under microwave assistance showed improved catalytic activity for the selective catalytic reduction of NO by NH3 (NH3-SCR). The high dispersion of V2O5 species and increased exposed active sites induced by microwaves were confirmed by comprehensive characterization methods. The microwave irradiation also enhanced the redox properties and surface chemisorbed oxygen species of the catalyst, resulting in improved SCR activity.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Chemistry, Multidisciplinary
Jianhua Liu, Guangyan Xu, Qi An, Yingjie Wang, Yunbo Yu, Hong He
Summary: In this study, Pt/Al2O3 catalysts were synthesized and their state was adjusted by heat treatment. The characterization results showed that high-temperature treatment induced the aggregation of platinum species to form metallic Pt nanoparticles. Pt/Al2O3 catalysts treated at high temperatures exhibited superior activity and water tolerance in the NH3-SCO reaction. Diffuse reflectance infrared Fourier-transform spectroscopy combined with mass spectrometry experiments revealed that Lewis acid sites were more reactive than Bronsted acid sites. It was also found that metallic Pt nanoparticles were beneficial for oxygen activation and less affected by water vapor.
