Performance and mechanism of CO2 reduction by DBD-coupled mesoporous SiO2

IF 6.1 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nanotechnology Reviews Pub Date : 2023-01-01 DOI:10.1515/ntrev-2023-0577
Jiangming Wang, Yongshi Yang, Jinxin Yu, Zhongzhou Ye, Zhen Li, Zhaolian Ye, Songjian Zhao
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Abstract

Abstract In the process of CO2 reduction with dielectric barrier discharge (DBD)-coupled catalysis, the existing material presents unsatisfactory synergy, such as high cost, complicated preparation processes, and low conversion rates. An inexpensive and environmentally friendly mesoporous SiO2 with different morphologies by gel–sol method was synthesized and then introduced for synergistic conversion of CO2 with DBD. The physicochemical properties of the synthesized mesoporous SiO2 materials were analyzed using X-ray diffraction, thermogravimetric analysis, scanning electron microscopy and Brunauer-Emmett-Teller method, indicated the prepared mesoporous materials manifested large specific surface areas, ordered pore channels and pore size, and good stability. The CO2 reduction performance, CO selectivity, and energy efficiency of DBD alone and DBD-coupled mesoporous SiO2 were investigated at different input powers. The SiO2 prepared with 1.05 g cetyltrimethylammonium bromide addition had the highest activity, in which the conversion of CO2, CO yield and energy efficiency were increased by 56.73, 68.41, and 122.31%, respectively, compared with DBD alone. The primary CO2 conversion mechanism of the mesoporous SiO2-coupled DBD was analyzed. It is shown that the suitable pore capacity structure, the large specific surface area, and the presence of filament discharge within the pore size of suitable mesoporous material can promote the decomposition of CO2 on its surface.
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DBD偶联介孔SiO2还原CO2的性能及机理
摘要在介电阻挡放电(DBD)耦合催化还原CO2的过程中,现有材料存在成本高、制备工艺复杂、转化率低等不理想的协同作用。采用凝胶-溶胶法合成了一种价格低廉、环境友好的不同形貌的介孔SiO2,并将其用于CO2与DBD的协同转化。利用X射线衍射、热重分析、扫描电子显微镜和Brunauer-Emmett-Teller方法对合成的介孔SiO2材料的理化性质进行了分析,表明所制备的介孔材料具有比表面积大、孔道和孔径有序、稳定性好的特点。研究了DBD单独和DBD偶联的介孔SiO2在不同输入功率下的CO2还原性能、CO选择性和能量效率。用1.05制备的SiO2 g十六烷基三甲基溴化铵的添加具有最高的活性,其中与单独的DBD相比,CO2转化率、CO产率和能源效率分别提高了56.73%、68.41%和122.31%。分析了介孔SiO2偶联DBD的主要CO2转化机理。结果表明,合适的孔容量结构、大的比表面积以及在合适的介孔材料的孔径内存在细丝放电可以促进CO2在其表面的分解。
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来源期刊
Nanotechnology Reviews
Nanotechnology Reviews CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
11.40
自引率
13.50%
发文量
137
审稿时长
7 weeks
期刊介绍: The bimonthly journal Nanotechnology Reviews provides a platform for scientists and engineers of all involved disciplines to exchange important recent research on fundamental as well as applied aspects. While expert reviews provide a state of the art assessment on a specific topic, research highlight contributions present most recent and novel findings. In addition to technical contributions, Nanotechnology Reviews publishes articles on implications of nanotechnology for society, environment, education, intellectual property, industry, and politics.
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