Article
Energy & Fuels
Rasika Mane, Heesu Kim, Kyeongwon Han, Kyoung-Jin Kim, Sang Soo Lee, Hyun-Seog Roh, Chanmin Lee, Yukwon Jeon
Summary: In order to effectively reduce PM2.5 emissions from industry and transportation, it is important to understand catalytic soot oxidation and its mechanism. This study investigates the synergistic effect of the Mn physicochemical structure on the soot oxidation activity of Ti-based oxide catalysts. The presence of Mn3+ oxidation state and an optimal combination of surface adsorbed and lattice oxygen species were found to significantly enhance the soot oxidation activity.
Review
Chemistry, Multidisciplinary
Wenyue Dai, Zihan Li, Congcong Li, Changsen Zhang, Fang Wang, Panpan Liu, Haonan Qiao
Summary: A series of MnCeOx catalysts with different Mn/Ce molar ratios were prepared, and the mechanism behind soot combustion was investigated. The MOFs-derived 2Mn1Ce-200 catalyst showed the lowest oxygen vacancy formation energy and stronger affinity for O2 and H2O, resulting in the highest catalytic activity among all catalysts.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Applied
Juan C. Medina, Omar Miguel-Lopez, Sandra E. Rodil, Rodolfo Zanella
Summary: This study reports the synthesis, characterization, and catalytic evaluation of two different mesoporous transition metal oxides for the soot oxidation reaction, and investigates the effect of sodium addition. The results show that the optimal sodium load can significantly enhance the catalytic performance, and the 7Na/m-Co3O4 catalyst exhibits good stability.
TOPICS IN CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Jing Xiong, Zhenguo Li, Peng Zhang, Qi Yu, Kaixiang Li, Yilin Zhang, Zhen Zhao, Jian Liu, Jianmei Li, Yuechang Wei
Summary: The 3DOM-Pt@MnOx/Al2O3 catalysts prepared by the GBMR/P method show high catalytic activities for soot combustion, with the optimized Pt-MnOx interface catalyst exhibiting the highest activity. These catalysts have the potential for practical applications in reducing soot particle emissions.
CHINESE CHEMICAL LETTERS
(2021)
Article
Environmental Sciences
Junfeng Huang, Shanshan Wang, Jianbing Gao, Yufeng Wang, Chaochen Ma, Guohong Tian, Haibo Chen
Summary: This paper investigates the effects of CeO2 on the oxidation activity and pore structure evolution of soot. CeO2 effectively enhances the oxidation activity of soot and lowers the initial activation energy. Moreover, CeO2 alters the oxidative mode of soot. Pure soot particles tend to develop a porous structure during oxidation, with mesopores facilitating oxygen diffusion and macropores preventing soot particle agglomeration. Additionally, CeO2 supplies active oxygen for soot oxidation and promotes multi-point oxidation in the beginning stages. The catalytic process causes the collapse of soot microspatial structures and the macropores formed by catalytic oxidation are filled by CeO2, resulting in closer contact between soot and catalyst and further enhancing the production of available oxygen for soot oxidation. This study is significant for understanding the oxidation mechanism of soot under catalysis, thereby providing a foundation for improving DPF regeneration efficiency and reducing particle emissions.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Peng Zhao, Nengjie Feng, Bangjie Tan, Zhuobin Huo, Geng Liu, Hui Wan, Guofeng Guan
Summary: In this study, facet controlled Ce1_xLaxO delta nanocomposites were constructed and used for soot abatement. The effects of crystal facets on heterogeneous catalysis were investigated. The results showed that the concentration of La3+ had a significant impact on the catalytic activity, with low concentrations enhancing the activity and excessive concentrations leading to undesirable effects.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Jing Xiong, Peng Zhang, Yuanfeng Li, Yuechang Wei, Yilin Zhang, Jian Liu, Zhen Zhao
Summary: The study demonstrates the importance of hierarchical porous structure in enhancing catalytic activity for soot oxidation. The Pd/3DOMM-ZrO2 catalyst shows the highest activity compared to catalysts with single macroporous or mesoporous structure, with a higher reaction rate at lower temperatures.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Physical
Eun Jun Lee, Min June Kim, Jin Woo Choung, Chang Hwan Kim, Kwan-Young Lee
Summary: The Ag/2MnO(x)-1CeO(2) catalyst showed significantly improved soot oxidation and NO oxidation activity under NOx-assisted conditions, demonstrating the importance of NOx adsorption characteristics in the process.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Energy & Fuels
Haijian Qin, Zelong Yang, Qing Xia, Peifei Yao, Chunzhi Zheng, Guangpin Lin, Zhaolian Ye, Songjian Zhao, Fengli Yang
Summary: Tantalum has been introduced as a novel carrier for CO conversion to improve the catalytic activity of Co. In this study, Co3O4 was loaded on four different forms of tantalum support, and Co/Ta-cm showed the highest CO conversion rate. The characterization results indicated that Co/Ta-cm had excellent crystallinity and stability, and X-ray photon spectroscopy and in-situ diffuse reflectance infrared Fourier transform spectroscopy revealed that Co3+ and lattice oxygen played crucial roles in CO oxidation.
Article
Energy & Fuels
Zijian Zhou, Lei Liu, Xiaowei Liu, Yue Zhou, Changqing Wang, Jingying Xu, Guozhang Chang, Minghou Xu
Summary: MnOx-based oxides are efficient catalysts for elemental mercury oxidation in flue gas, and combining with CeO2 or CeO2-ZrO2 enhances their catalytic activity. The new MnOx-CeO2-ZrO2 solid solution catalyst showed better Hg-0 oxidation performance compared to the MnOx/CeO2-ZrO2 supported catalyst. Mn4+ and surface active oxygen were identified as the active species in Hg-0 oxidation reactions, and SO2 significantly inhibited the activity of MnOx/CeO2-ZrO2 but had less impact on MnOx-CeO2-ZrO2 solid solution.
Article
Chemistry, Inorganic & Nuclear
Guanlun Guo, Jing Yu, Mingrui Wei
Summary: In this study, an Ag-CeO2-LSCF composite catalyst was prepared by impregnation method. The change in catalytic soot performance of the LSCF catalyst before and after composite was investigated. The results showed that the A-C-L composite catalyst exhibited a good microstructure and had lower characteristic temperatures compared to pure LSCF. The catalytic performance of the A-C-L composite catalyst was found to be the best when the Ag content was 8 wt%.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Huafang Li, Qi Pan, Jianxun Liu, Wei Liu, Qian Li, Liguo Wang, Zhongpeng Wang
Summary: In this study, a series of Pr6O11 catalysts were developed by CTAB-assisted coprecipitation method and their catalytic performances for soot oxidation and NOx adsorption were investigated. The Pr6O11 catalysts exhibited excellent catalytic activities for both soot oxidation and NOx adsorption at low temperature, which was attributed to their relatively large surface area, strong NO oxidation ability, and high intrinsic activity. The presence of NO was found to promote the soot oxidation, and the possible mechanism of the soot oxidation reaction process was explored using in situ DRIFTS.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Denghui Wang, Hui Li, Qi Yao, Shien Hui, Yanqing Niu
Summary: Various Mn-based catalysts for NO oxidation were prepared using MnOx as the active compound and TiO2 and Al2O3 as the catalyst supports. The results showed that Mn-0.4/Al exhibited the best catalytic efficiency, with Al2O3 providing more active oxygen sites for oxidation and MnOx/Al2O3 having higher surface area and pore volume.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Energy & Fuels
Di Yu, Chao Peng, Xuehua Yu, Lanyi Wang, Kaixiang Li, Zhen Zhao, Zhenguo Li
Summary: In this study, a series of CenMnOx catalysts with different Ce contents and calcination temperatures were successfully synthesized via a simple hydrothermal process. It was found that the Ce-doped Ce1MnOx amorphous catalysts exhibited better ability to activate oxygen species and stability for catalytic combustion of soot particles. These catalysts show promise for application in soot combustion due to their simple preparation, low cost, and good catalytic performance.
Article
Chemistry, Physical
Hyunsu Han, Song Jin, Seongmin Park, Yoongon Kim, Daehee Jang, Min Ho Seo, Won Bae Kim
Summary: Oxygen vacancy engineering is a new direction for designing high-performance catalysts for electrochemical CO2 reduction. Amorphous MnOx catalysts with different concentrations of oxygen vacancies were prepared, with the high vacancy catalyst showing superior CO2 to CO conversion efficiency. This enhancement is attributed to the oxygen vacancies facilitating CO2 adsorption/activation and promoting charge transfer for efficient CO2 reduction.
Article
Materials Science, Multidisciplinary
Yibo Gao, Shichang Teng, Zhongpeng Wang, Baoqin Wang, Wei Liu, Wenxu Liu, Liguo Wang
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Wei Liu, Baoqin Wang, Chenchen Cui, Yiwen Zhang, Lixuan Wang, Zhongpeng Wang
Summary: A series of Cu-based samples were obtained via a controllable surface restructuring method, with S2 samples exhibiting superior catalytic activities towards CO oxidation due to the interplay between Cu2O and CuO.
Article
Chemistry, Applied
Wenxu Liu, Huiming Cao, Zhongpeng Wang, Chenchen Cui, Liangran Gan, Wei Liu, Liguo Wang
Summary: A highly active CeO2 catalyst with a hollow nanosphere morphology for low temperature NOx storage was prepared, showing excellent NO oxidation capacity, smaller mesopores, better reducibility, and higher NOx storage capacity compared to CeO2 with nanorod and nanoparticle morphologies. This new ceria morphology may become a potential excellent NOx storage material.
JOURNAL OF RARE EARTHS
(2022)
Article
Energy & Fuels
Yibo Gao, Erjiang Hu, Geyuan Yin, Zuohua Huang
Summary: Pd nanoparticles (NPs)-CeO2 based catalysts were successfully synthesized, with Pd NPs uniformly dispersed on CeO2 nanospheres showing excellent catalytic performance. Increasing Pd loading amount led to improved catalytic efficiency, with the 10 wt% Pd*CeO2 catalyst exhibiting the highest activity for dehydrogenation of formic acid. The superior performance of 10 wt% Pd*CeO2 can be attributed to the high dispersion of Pd NPs, more electron-rich Pd active sites, and the Strong Metal-Support Interactions (SMSI) between Pd and CeO2.
Article
Biochemistry & Molecular Biology
Tong Li, Yuhong Wang, Xinyan Wang, Caixia Cheng, Kaifeng Zhang, Jie Yang, Guangshuo Han, Zhongpeng Wang, Xiuju Wang, Liguo Wang
Summary: The study focuses on the application of zeolitic imidazolate framework-8 (ZIF-8) in forward osmosis membranes for seawater desalination. The results show that ZIF-8 has promising potential in this field.
Article
Energy & Fuels
Ben Wang, Zhongpeng Wang, Lijie Ai, Wei Liu, Qian Li, Xiuju Wang, Liguo Wang
Summary: A highly active catalyst of K-supported Pr(2)Sn(2)O(7) pyrochlore nanosphere was synthesized and showed excellent catalytic performance and high stability in soot combustion. The potassium species on the catalyst surface exist in three forms and contribute to improved catalyst-soot contact, increased surface basicity, enhanced reducibility, and potential participation in soot oxidation. The results suggest that this catalyst has the potential for application in diesel exhaust control processes.
Article
Engineering, Environmental
Tong Li, Xuelian Ba, Xiuju Wang, Zhongpeng Wang, Jie Yang, Yu Cui, Liguo Wang
Summary: In this study, MIL-53(Fe)@gamma-Al2O3 composite materials were synthesized via solvent-thermal method, and MIL-53(Fe)@gamma-Al2O3/cellulose acetate composite membranes with high desalination performance were fabricated. The results showed that the MIL-53(Fe)@gamma-Al2O3/CA membrane demonstrated better perviousness and selectivity properties compared to the MIL-53(Fe)/CA membrane, indicating a potential advantage of MOF composites in improving the desalination performance of forward osmosis membranes.
ENVIRONMENTAL ENGINEERING RESEARCH
(2023)
Article
Environmental Sciences
Tong Li, Caixia Cheng, Kaifeng Zhang, Jie Yang, Guangshuo Han, Xiuju Wang, Zhongpeng Wang, Liguo Wang
Summary: By introducing UiO-66-NH2 into cellulose acetate forward osmosis membrane, the water permeability and selectivity of the membrane can be improved. UiO-66-NH2 has the potential advantage as an additive for enhancing the desalination performance of forward osmosis membranes.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Energy & Fuels
Ben Wang, Zhongpeng Wang, Zhuo Yang, Huafang Li, Hui Sheng, Wei Liu, Qian Li, Liguo Wang
Summary: A series of novel highly dispersed MnOx on the MgAlOx support were prepared and exhibited superior low-temperature selective catalytic reduction of NOx performance as well as remarkable resistance against H2O. The MgAlOx support provided large specific area for the dispersion of Mn and more adsorption sites for reactant molecules.
Article
Chemistry, Physical
Wei Liu, Hui Sheng, Liu Zhu, Yiwen Zhang, Wenxu Liu, Yuwei Zhao, Qian Li, Yong Peng, Zhongpeng Wang
Summary: Al3+ doping is an effective strategy to improve the catalytic activity and sintering resistance of supported Au catalysts. It increases the number of oxygen vacancies, providing preferential adsorption sites for CO molecules. In addition, Al3+ doping promotes the formation of smaller and more dispersed Au nanoparticles. The prepared AuCeAl catalysts exhibit superior catalytic performance even at high temperatures.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Environmental Sciences
Guangshuo Han, Longtan Ma, Caisong Zhang, Baihui Wang, Xianghao Sheng, Zhongpeng Wang, Xiuju Wang, Liguo Wang
Summary: In this study, the degradation of o-cresol by three types of microalgae (Selenastrum capricornutum, Scenedesmus obliquus, and Microcystis aeruginosa) was investigated. The results showed that Selenastrum capricornutum had the best degradation effect on o-cresol, with complete degradation within 5 days under suitable conditions.
Article
Engineering, Chemical
Baihui Wang, Tong Li, Tianjin Li, Caixia Cheng, Kaifeng Zhang, Guangshuo Han, Zhongpeng Wang, Xiuju Wang, Liguo Wang
Summary: Membrane technology, especially with the synthesis of metal-organic framework materials (MOFs), has significantly improved water treatment processes. The addition of MOFs to polymeric matrices has shown to enhance separation efficiency in mixed matrix membranes (MMMs). This paper discusses the advantages of MOFs and the preparation method of MOFs-based composite membranes, highlighting the integration of MOFs in various membrane processes like forward osmosis, ultrafiltration, nanofiltration, and reverse osmosis. Insights and viewpoints on future research and development directions are also provided.
DESALINATION AND WATER TREATMENT
(2023)
Article
Engineering, Environmental
Huafang Li, Qi Pan, Jianxun Liu, Wei Liu, Qian Li, Liguo Wang, Zhongpeng Wang
Summary: In this study, a series of Pr6O11 catalysts were developed by CTAB-assisted coprecipitation method and their catalytic performances for soot oxidation and NOx adsorption were investigated. The Pr6O11 catalysts exhibited excellent catalytic activities for both soot oxidation and NOx adsorption at low temperature, which was attributed to their relatively large surface area, strong NO oxidation ability, and high intrinsic activity. The presence of NO was found to promote the soot oxidation, and the possible mechanism of the soot oxidation reaction process was explored using in situ DRIFTS.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Wei Liu, Huiming Cao, Miao Tian, Zhongpeng Wang, Liguo Wang, Fang He
Summary: Spindle-shaped beta-FeOOH nanostructures were successfully prepared using a facile, green, and glycerol-assisted solvothermal process. The nanostructures exhibited uniform particle size and high adsorption capacity, making them a promising low-cost nanomaterial for efficient removal of organic pollutants from wastewater.
SCIENCE OF ADVANCED MATERIALS
(2021)