Acta Chimica Sinica ›› 2023, Vol. 81 ›› Issue (8): 869-873.DOI: 10.6023/A23050200 Previous Articles     Next Articles

Special Issue: 庆祝《化学学报》创刊90周年合辑


钌/石英滤纸: 可回收型CO2甲烷化光热催化膜

田茹心a, 杨苗a, 陈果a, 刘豇汕a, 袁梦梅a, 原弘a, 欧阳述昕a,*(), 张铁锐b   

  1. a 华中师范大学化学学院 光能利用与减污降碳教育部工程研究中心 武汉 430079
    b 中国科学院理化技术研究所 光化学转换与功能材料重点实验室 北京 100190
  • 投稿日期:2023-05-04 发布日期:2023-09-14
  • 作者简介:
  • 基金资助:
    项目受国家自然科学基金(22272061); 项目受国家自然科学基金(21972052)

Ru/Quartz Filter Paper: A Recyclable Photothermocatalytic Film for CO2 Methanation

Ruxin Tiana, Miao Yanga, Guo Chena, Jiangshan Liua, Mengmei Yuana, Hong Yuana, Shuxin Ouyanga(), Tierui Zhangb   

  1. a Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079
    b Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190
  • Received:2023-05-04 Published:2023-09-14
  • Contact: *E-mail:
  • About author:
    Dedicated to the 90th anniversary of Acta Chimica Sinica.
  • Supported by:
    National Natural Science Foundation of China(22272061); National Natural Science Foundation of China(21972052)

Photothermocatalysis provides a green approach to convert solar energy to chemical energy. In previous studies, the most catalysts were powdered particles, which faces a problem that the light irradiation cannot reach the underlying catalysts, thereby making these catalysts not exhibit activity. A possible resolution to this difficulty is to load active phase on a thin substrate. In this study, a photothermocatalytic film of Ru/quartz filter paper (abbreviated as QFP) was designed, in which the Ru particles were loaded on a QFP with a thickness as thin as 0.36 mm. A photothermal synthesis was adopted to load the Ru particles. A 5 μL of precursor of RuCl3 ethanol solution was dripped on the QFP and then the QFP was dried under the irradiation of Xe lamp; this operation was repeated until all the precursor were loaded. After that, the QFP with Ru precursor was reduced in an atmosphere of H2/Ar mixture [V(H2)∶V(Ar)=1∶9] at photothermal 400 ℃ for 30 min. The loading mass of Ru particles were optimized by loading 1, 2, 3, and 4 mg of Ru on QFP to fabricate four samples. The X-ray diffraction (XRD) measurement revealed that the QFP was amorphous while the loaded Ru particles were metallic. The scanning electronic microscopy (SEM) indicated that the Ru particles were loaded on the SiO2 fiber of QFP steadily and most of Ru particles possessed a size less than 200 nm. Next, the photothermocatalytic CO2 methanation was carried out over the as-prepared catalysts to assess their catalytic activity. The catalyst with 2 mg Ru loading showed the highest performance; it delivered an 85.5% of CO2 conversion during 2 h of light irradiation. Although the four samples exhibited different CO2 conversion, the selectivities for CH4 product over these samples were all close to 100%. The stability of optimal catalyst was tested in a flow-type reaction system; under a 5 mL•min-1 flow rate of reactant gases, the CO2 conversion over the catalyst could remain around 51% during 12 h and the apparent CH4 yield rate reached 478.1 mmol•gRu-1•h-1. This study demonstrates a photothermal synthesis of recyclable Ru/QFP film and its application of photothermocatalytic CO2 methanation, which provides an energy-efficient process to achieve decarbonization and therefore is of great potential for practical application.

Key words: photothermocatalysis, Ru, quartz filter paper, CO2 methanation, photothermocatalytic film