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Ma M, Xu S, Liu Q, Xu J, Li Y, Sun Y, Yu Y, Chen C, Chen Z, Li L, Zheng C, He C. Rationally Engineering a CuO/Pd@SiO 2 Core-Shell Catalyst with Isolated Bifunctional Pd and Cu Active Sites for n-Butylamine Controllable Decomposition. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:16189-16199. [PMID: 36214785 DOI: 10.1021/acs.est.2c04256] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Volatile organic amines are a category of typical volatile organic compounds (VOCs) extensively presented in industrial exhausts causing serious harm to the atmospheric environment and human health. Monometallic Pd and Cu-based catalysts are commonly adopted for catalytic destruction of hazardous organic amines, but their applications are greatly limited by the inevitable production of toxic amide and NOx byproducts and inferior low-temperature activity. Here, a CuO/Pd@SiO2 core-shell-structured catalyst with diverse functionalized active sites was creatively developed, which realized the total decomposition of n-butylamine at 260 °C with a CO2 yield and N2 selectivity reaching up to 100% and 98.3%, respectively (obviously better than those of Pd@SiO2 and CuO/SiO2), owing to the synergy of isolated Pd and Cu sites in independent mineralization of n-butylamine and generation of N2, respectively. The formation of amide and short-chain aliphatic hydrocarbon intermediates via C-C bond cleavage tended to occur over Pd sites, while the C-N bond was prone to breakage over Cu sites, generating NH2· species and long free-N chain intermediates at low temperatures, avoiding the production of hazardous amide and NOx. The SiO2 channel collapse and H+ site production resulted in the formation of N2O via suppressing NH2· diffusion. This work provides critical guidance for a rational fabrication of catalysts with high activity and N2 selectivity for environmentally friendly destruction of nitrogen-containing VOCs.
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Affiliation(s)
- Mudi Ma
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an710049, Shaanxi, P.R. China
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637459Singapore
| | - Shuai Xu
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an710064, P.R. China
| | - Qiyuan Liu
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an710049, Shaanxi, P.R. China
| | - Junwei Xu
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an710049, Shaanxi, P.R. China
| | - Yuliang Li
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an710064, P.R. China
| | - Yukun Sun
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an710064, P.R. China
| | - Yanke Yu
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an710049, Shaanxi, P.R. China
| | - Changwei Chen
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an710049, Shaanxi, P.R. China
| | - Zhaohui Chen
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an710049, Shaanxi, P.R. China
| | - Lu Li
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an710049, Shaanxi, P.R. China
| | - Chunli Zheng
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an710049, Shaanxi, P.R. China
| | - Chi He
- State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an710049, Shaanxi, P.R. China
- National Engineering Laboratory for VOCs Pollution Control Material and Technology, University of Chinese Academy of Sciences, Beijing101408, P.R. China
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Wang H, Xu J, Xing D, Du X, Wang H, Du Z, Cheng X. Healable and reprocessable silica/poly(oxime‐urethane) composite elastomer with high mechanical robustness and exceptional damage‐tolerant capacity. J Appl Polym Sci 2022. [DOI: 10.1002/app.52472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hui Wang
- College of Biomass Science and Engineering Sichuan University Chengdu China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan University Chengdu China
| | - Junhuai Xu
- College of Biomass Science and Engineering Sichuan University Chengdu China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan University Chengdu China
| | - Dongming Xing
- Shandong Weigao Group Medical Polymer Company Limited Weihai China
| | - Xiaosheng Du
- College of Biomass Science and Engineering Sichuan University Chengdu China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan University Chengdu China
| | - Haibo Wang
- College of Biomass Science and Engineering Sichuan University Chengdu China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan University Chengdu China
| | - Zongliang Du
- College of Biomass Science and Engineering Sichuan University Chengdu China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan University Chengdu China
| | - Xu Cheng
- College of Biomass Science and Engineering Sichuan University Chengdu China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan University Chengdu China
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Li T, Zhang P, Chen B, Liu S, Deng J. Synthesis and properties of
UV‐curable
waterborne urethane modified acrylic coatings with varying vinyl content. J Appl Polym Sci 2020. [DOI: 10.1002/app.49384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tongqing Li
- College of Chemistry and Chemical EngineeringHunan University Changsha China
| | - Pingan Zhang
- College of Chemistry and Chemical EngineeringHunan University Changsha China
| | - Bo Chen
- College of Chemistry and Chemical EngineeringHunan University Changsha China
| | - Simeng Liu
- College of Chemistry and Chemical EngineeringHunan University Changsha China
| | - Jianru Deng
- College of Chemistry and Chemical EngineeringHunan University Changsha China
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