Article
Biotechnology & Applied Microbiology
Quanming Liang, Jian Li, Tao Yue
Summary: The addition of 3% CeO2 improved the performance and resistance of the V2O5-WO3/TiO2 catalyst by establishing a protective layer. The experiment showed that layered filling can slow down the catalyst's deactivation rate, and the deposition amounts of NH4+ and SO42- can be used as indicators for judging the degree of poisoning.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Tingting Que, Kaijiao Duan, Sivasankar Koppala, Yanfang Zhang, Yungang He, Lijuan Jia, Tiancheng Liu
Summary: In this study, a novel co-precipitation coupled solvothermal procedure was used to prepare a SmMnOx catalyst with a reed flower-like structure, which exhibited excellent performance in the selective catalytic reduction of NOx by NH3 at low temperatures. The unique morphology of the catalyst, characterized by the largest surface area, strong synergistic reaction of Sm and Mn, abundant surface oxygen species and active sites, and enhanced redox ability, contributed to its superior catalytic performance. Moreover, the amorphous reed flower-like structure promoted short-range ordered interaction between active components and inhibited the formation of sulfate species.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Lu Qiu, Dengkui Li, Hanliang Li, Zhaoyong Ren, Zhenye Zhu, Feng Ouyang, Mingxin Guo
Summary: Research on Fe-modified Mn-Co-Ce/TiO2/SiO2 catalysts for low-temperature NH3-SCR revealed that the addition of Fe can enhance the catalyst's resistance to sulfur and water poisoning, improving the stability and durability of the catalyst.
Article
Chemistry, Physical
Lin Guo, Jianjiang Lu, Yonggang Zhao, Chengzhi Wang, Cheng Zhang, Changjin Tang, Lin Dong, Wei Kong, Qijun Li, Peng Cao
Summary: The novel Ce-based low-temperature honeycomb catalyst showed high efficiency in DeNO(x) of flue gas with high water vapor and low sulfur dioxide content, demonstrating stable performance over an extended period. Physicochemical properties of the catalyst were thoroughly investigated through various characterization methods, showing effective prevention of particulate matter deposition in the flue gas.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Yu Lyu, Gang Lyu, Yunqing Li, Bo Li, Ke Chen, Chonglin Song, Zhenguo Li, Suozhu Pan
Summary: The storage and reduction of NOx on Fe-modified hydrotalcite-based catalysts were evaluated, and the product selectivity was studied. The introduction of Fe improved the interaction between Mg and Fe in the catalyst structure, allowing efficient operation at low temperatures. Pt/BaO/MgFeO catalyst showed excellent low temperature activity, high selectivity for N2, and superior sulfur resistance compared with Pt/BaO/Al2O3.
Article
Chemistry, Multidisciplinary
Haixia Li, Shuaibo Zhang, Anchao Zhang, Xinmin Zhang, Zhijun Sun, Changze Yang, Qifeng Zhu
Summary: Novel Mn6Zr1-xCox denitrification catalysts were prepared by the co-precipitation method. The co-modification of MnOx catalyst by zirconium and cobalt significantly improved the performance of NH3-SCR, with the Mn6Zr0.3Co0.7 catalyst achieving over 90% NOx conversion in a reaction temperature range of 100-275 degrees C and up to 99% in the best case. Additionally, the Mn6Zr0.3Co0.7 catalyst exhibited excellent resistance to sulfur and water.
FRONTIERS IN CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Chen Yaling, Shu Song, Wang Shaoxin, Li Jianjun
Summary: A Mn-HAP catalyst was successfully synthesized for low-temperature nitrogen removal, showing improved sulfur resistance by using HAP as an active carrier. Metal sulfate had a more significant impact on the denitrification activity at low temperature compared to ammonium sulfate.
JOURNAL OF INORGANIC MATERIALS
(2022)
Article
Engineering, Chemical
Kaiwen Ni, Yuewang Peng, Geyu Dai, Huawang Zhao, Zhiwei Huang, Xiaomin Wu, Guohua Jing, Wei Feng, Ye Yuan
Summary: In this study, ceria was used to decorate a catalyst to enhance the decomposition of ammonia bisulfate in low-temperature NH3-selective catalytic reduction. The optimal catalyst showed accelerated ABS decomposition and superior SO2 tolerance at 250 degrees Celsius. The additive CeO2 improved the catalyst's specific surface area and acidity, favoring the catalytic activity.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Energy & Fuels
Lijun Liu, Sheng Su, Dezhi Chen, Tao Shu, Xiaotao Zheng, Jiuyang Yu, Yu Feng, Yi Wang, Song Hu, Jun Xiang
Summary: The MnFeW/Ti composite oxide catalyst exhibits excellent SCR activity, N-2 selectivity and SO2 tolerance due to the formation of Mn-O-W and Fe-O-W bonds, which accelerate the SCR reaction rate. By tuning surface acidity via W doping, the oxidation of SO2 is inhibited, leading to improved performance at low temperature.
Article
Green & Sustainable Science & Technology
Cihang Niu, Baorui Wang, Yi Xing, Wei Su, Chi He, Lei Xiao, Yurong Xu, Shuqi Zhao, Yonghong Cheng, Jian-Wen Shi
Summary: A new Tm-modified Mn/TiO2 catalyst was developed for low temperature NO removal, showing significantly improved SCR de-NOx performance with NH3 as reducing agent. Introduction of appropriate Tm content enhanced the surface properties and reactivity of the catalyst, leading to enhanced de-NOx capabilities.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Chemistry, Physical
Zhenghua Shen, Shan Ren, Baoting Zhang, Weixin Bian, Xiangdong Xing, Zhaoying Zheng, Maria J. Sabater
Summary: This study introduces the efficient performance of low-temperature NH3-SCR technology for NOx removal from flue gas and discusses the potential application and challenges of carbon-based catalysts in this technology. Strategies to improve the resistance of carbon-based catalysts to water and SO2 are summarized, providing guidance for further development in this field.
Article
Chemistry, Physical
Yusuke Inomata, Hiroe Kubota, Yoshinori Honmatsu, Hiroaki Takamitsu, Sosuke Sakotami, Kazuhiro Yoshida, Takashi Toyao, Ken-ichi Shimizu, Toru Murayama
Summary: NH3-SCR is a key technique for reducing harmful NOx emissions. The study shows that Na-intercalated vanadium oxide can accelerate the reaction and improve the efficiency of NH3-SCR.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Zhiwei Huang, Sufeng Guo, Wen Chen, Meirong Huang, Jiangwei Ni, Qiqi Zhou, Mingshuo Tian, Xiaomin Wu, Huawang Zhao, Huazhen Shen, Wei Li, Guohua Jing
Summary: By pretreating the V2O5/MoO3/TiO2 catalyst with H2, it shows high activity and excellent stability in NH3-SCR performance under SO2 and H2O poisoning conditions at low temperatures. On the other hand, the commercial V2O5/WO3/TiO2 catalyst quickly deactivates due to the formation of liquid-like ABS.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Madeline T. Van Dongen, Derrick Ng, Leonardo Moura, Durga Acharya, Jinxiu Wang, Christopher D. Easton, Feng Wang, Zongli Xie
Summary: A MnOX/FeOX catalyst was developed for high NO conversion in industrial flue gas conditions, with over 90% conversion achieved in a temperature range of 125-225°C. Addition of PTFE improved water vapor resistance and further enhanced NO conversion, reaching up to 98% conversion with up to 10% water vapor present.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Engineering, Environmental
Jian Gao, Chunqiang Lu, Wei Su, Zhiqiang Li, Xingyun Li, Yannan Zhao, Guixian Deng, Kongzhai Li
Summary: This study investigates the enhancement of cold-rolled sludge catalyst in NH3-SCR through sulfuric acid impregnation and calcination. The results show that the performance of denitration is significantly improved, and the mechanism of improvement is determined through various testing methods.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Applied
Xiaotong Li, Xufei Shao, Zhisheng Wang, Jinzhu Ma, Hong He
Summary: This study successfully regulated the chemical states of Ag species by varying the loading of Ag and the particle size of alpha-Fe2O3 supports, and determined the O3 decomposition performance of different Ag species. The changes undergone by Ag species after exposure to ozone were characterized in detail, and the corresponding ozone decomposition performance of the Ag species was determined. The study provides guidance for understanding the mechanism of the interaction between metals and supports and the development of high-efficiency Ag-based catalysts.
Article
Chemistry, Multidisciplinary
Yan Zhang, Lei Zhou, Lei Zhang, Wei Luo, Wei Shen, Ming Li, Rongxing He
Summary: In this work, deep-red emitting lead-free metal-halide perovskites with high photoluminescence quantum yields (PLQYs) and outstanding stability were synthesized through a solvothermal method. The resulting Cs2ZnCl4:Sn exhibited strong deep-red photoluminescence and excellent structure stability in air, with a PLQY of 99.4% and 96% remaining after one year exposure to the atmosphere, respectively. Detailed experimental characterizations and theoretical calculations revealed that the deep-red emission originated from self-trapped excitons induced by the Sn2+ dopant, and triplet emission from Sn-5s2 orbitals was observed at low temperature.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Liping Zhou, Chunying Wang, Yaobin Li, Xiaofeng Liu, Hua Deng, Wenpo Shan, Hong He
Summary: It is found that hydrogen reduction dramatically improves the catalytic performance of alpha-MnO2 in formaldehyde oxidation. The alpha-MnO2 sample reduced by hydrogen for 2 h exhibited superior activity and could completely oxidize 150 ppm formaldehyde to CO2 and H2O at 70 degrees Celsius. The production of more oxygen vacancies through hydrogen reduction enhanced the adsorption, activation, and mobility of O2 molecules on the catalyst surface, thereby enhancing formaldehyde catalytic oxidation. This study provides novel insight into the design of outstanding MnOx catalysts for formaldehyde oxidation at low temperature.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Zhihua Lian, Mingji Zheng, Qiang Wang, Yingjie Li, Feng Deng, Wenpo Shan, Hong He
Summary: The presence of abundant hydroxyl groups on the TiO2 support facilitated the dispersion of vanadia species on V2O5/TiO2 catalysts during the ball-milling process. This resulted in a high ratio of polymeric vanadyl species and strong redox capability for the vanadia-based catalyst, leading to good NH3-SCR activity.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Environmental
Jiuhui Li, Zhengfang Wu, Hongshi He, Wenxi Lu
Summary: The grey wolf optimization algorithm (GWO) has the disadvantage of premature convergence when solving the optimization model for groundwater contamination sources (IGCSs) due to its weak local search ability. To improve it, a hybrid grey wolf gradient optimization algorithm (HGWGO) was developed by integrating GWO with the gradient descent algorithm, which showed a strong local search ability and less dependence on the initial value. The HGWGO was applied to the optimization model to enhance the accuracy of IGCSs. Additionally, a surrogate model using a deep belief neural network (DBNN) was established to participate in the iterative calculation, reducing the computational load and time consumption.
STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
(2023)
Article
Chemistry, Multidisciplinary
Zhe Ma, Hua Deng, Lin Li, Qiang Zhang, Guangrui Chen, Chang Sun, Hong He, Jihong Yu
Summary: Highly dispersed nanosized Beta zeolite with a high toluene adsorption capacity was synthesized using a microwave-assisted hydrothermal strategy, providing a facile avenue for fluoride-free and seed-free synthesis of high-silica zeolites for VOCs adsorption.
Article
Chemistry, Physical
Zhisheng Wang, Xiaotong Li, Jinzhu Ma, Hong He
Summary: In this study, NiFe layered double hydroxide (NiFe-LDH) monolithic catalysts supported by metal foam were synthesized in-situ by a simple one-step hydrothermal method and applied for ozone elimination for the first time. NiFeLDH/IF (Iron Foam, IF) monolithic catalysts were successfully prepared without the use of ammonium fluoride (NH4F), thus avoiding the generation of wastewater containing fluorine. The optimized NiFe-LDH/IF monolithic catalyst exhibited ozone conversion rates of 91.5% and 85% after 6 and 168 hours, respectively, under harsh conditions, demonstrating promising potential for ozone pollution control.
CATALYSIS COMMUNICATIONS
(2023)
Article
Environmental Sciences
Naveed Muhammad, Hongshi He, Shengwei Zong, Haibo Du, Zulqarnain Satti, Xinyuan Tan, Muhammad Yasir Qazi
Summary: Cotton plays a significant role in Pakistan's economy as the second-largest crop, but its productivity has become unstable due to climate change. This study investigates the relationship between cotton yield variability and climate factors, finding that precipitation has shown an overall decreasing trend. The results also demonstrate an increasing trend in cotton yield variability, highly correlated with climate variability. Climate factors have had a dominant impact on cotton production in the study area from 1990 to 2019.
CHINESE GEOGRAPHICAL SCIENCE
(2023)
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
Engineering, Chemical
Jingqi Yang, Hua Deng, Yuqin Lu, Jinzhu Ma, Wenpo Shan, Hong He
Summary: This study developed a simple and scalable method to produce catalysts through thermal annealing of Mn precursor. The obtained PdCe-MnOx catalyst, with slight addition of Ce and Pd, showed excellent O-3 removal activity in the presence of water vapor. Various characterization methods were used to explore the relationship between activity and structure.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Environmental Sciences
Chao Huang, Shun Li, Hong S. He, Yu Liang, Wenru Xu, Mia M. Wu, Zhiwei Wu, Cheng Huang, Fusheng Chen
Summary: Climate change and forest management practices have significant impacts on forest productivity and carbon budgets. Understanding their interactions is crucial for accurately predicting carbon dynamics and achieving carbon neutrality. This study developed a model-coupling framework to simulate the carbon dynamics of boreal forests in China, considering past timber harvesting and future climate change scenarios and management practices. The results show that current management strategies coupled with climate change will increase fire frequency and intensity, transforming these forests from carbon sinks to carbon sources. It suggests that future boreal forest management should focus on reducing the probability of fires and carbon losses through the use of deciduous species, mechanical removal, and controlled fires.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Jie Li, Tengfei Ma, Shanwei Lou, Tao Lin, Chunwu Wang, Hong He, Paerhati Maimaiti, Tuerxunjiang Maimaiti, Tuoheti Aimaiti, Pengzhong Zhang
Summary: This study investigated the impact of irrigation water amount and planting pattern on water use and yield of cotton in Northern Xinjiang. The results showed that the evapotranspiration (ET), soil evaporation (Es), and plant transpiration (T) of cotton increased with increasing irrigation amount. The yield increased with the irrigation amount, but water use efficiency (WUE) first increased and then decreased.
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
(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
Energy & Fuels
Meng Wang, Yan Zhang, Yunbo Yu, Wenpo Shan, Hong He
Summary: In this study, a 3 %Co/Ce-Sn catalyst displayed higher efficiency in soot oxidation compared to a 1 %Pt/CeSn catalyst. The 3 %Co/Ce-Sn catalyst also exhibited strong resistance to H2O and SO2 poisoning. The introduction of Co induced more oxygen defects, enabling the activation of chemisorbed oxygen and the production of active oxygen species. Furthermore, it was discovered that the oxidation process of NO to NO2 was governed by active oxygen species, which facilitated soot oxidation through a NO2-assisted mechanism. These findings provide valuable insights for the design of cost-effective and high-performance catalysts for soot oxidation, with the 3 %Co/Ce-Sn catalyst being a promising candidate for controlling soot in diesel vehicles.
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)
