物理化学学报 >> 2025, Vol. 41 >> Issue (11): 100133.doi: 10.1016/j.actphy.2025.100133

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分子筛介导的氧化铟催化剂用于增强光催化CO2加氢

管勤辉1, 郭昱昊1, 李娜2,*(), 李敬3, 颜廷江1,2,*()   

  1. 1 陕西科技大学化学与化工学院, 陕西 西安 710021
    2 曲阜师范大学化学与化工学院, 山东 曲阜 273165
    3 中国科学院理化技术研究所光化学转换与光电材料重点实验室, 北京 100190
  • 收稿日期:2025-06-16 修回日期:2025-07-18 录用日期:2025-07-20 发布日期:2025-09-29
  • 通讯作者: Email: lina20201130@163.com (李娜)tingjiangn@163.com (颜廷江)
  • 基金资助:
    国家自然科学基金(22172086); 国家自然科学基金(22105117); 山东省泰山学者计划(tsqn202103064); 山东省重大基础研究项目(ZR2021ZD06)

Molecular sieve-mediated indium oxide catalysts for enhancing photocatalytic CO2 hydrogenation

Qinhui Guan1, Yuhao Guo1, Na Li2,*(), Jing Li3, Tingjiang Yan1,2,*()   

  1. 1 College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, Shannxi Province, China
    2 School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong Province, China
    3 Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2025-06-16 Revised:2025-07-18 Accepted:2025-07-20 Published:2025-09-29
  • Contact: Email: lina20201130@163.com (Na Li)tingjiangn@163.com (Tingjiang Yan)
  • Supported by:
    the National Natural Science Foundation of China(22172086); the National Natural Science Foundation of China(22105117); the Taishan Scholars Program of Shandong Province(tsqn202103064); the Major Basic Research Project of Shandong Province(ZR2021ZD06)

摘要:

在光催化CO2加氢领域,光生载流子的吸附-脱附行为及其动力学特性是影响光催化反应动力学过程与整体效率的关键因素。本文通过简便的浸渍-煅烧法制备了5A分子筛功能化的In2O3复合材料(记为IO@5A-xwt%)。其中,经5A分子筛负载量优化的IO@5A-5wt%复合材料在光催化CO2转化为CO的反应中表现出色,CO生成速率达到2610.55 μmol·g−1·h−1,为原始In2O3的19倍。此外,IO@5A-5wt%复合材料在经过持续45 h、总计108次循环的长时间测试后仍保持可接受的催化稳定性。一系列全面的表征技术和性能评估表明,5A分子筛的引入显著调节了光催化反应中的吸附-脱附行为和空穴动力学。5A分子筛的多通道结构具有合适的孔径,有效增强了CO2的吸附。同时,5A分子筛的表面羟基促进了光生空穴的转移,从而抑制了光生载流子的复合。此外,反应产物H2O更容易从催化剂表面脱附。这些协同效应共同构成了IO@5A-5wt%复合材料光催化性能增强的关键机制。

关键词: 分子筛, In2O3, 分子选择性储层, 光催化, CO2加氢

Abstract:

In the realm of photocatalytic CO2 hydrogenation, the adsorption-desorption behaviors and dynamics of photogenerated carriers are pivotal determinants of the kinetic processes and overall efficiency of photocatalytic reactions. Herein, 5A molecular sieve-functionalized In2O3 composites (denoted as IO@5A-xwt%) were fabricated through a facile impregnation-calcination method. Among them, the IO@5A-5wt% composite, with the optimized loading amount of 5A molecular sieves, showcases outstanding performance in photocatalytic conversion of CO2 to CO, achieving a CO production rate of 2610.55 μmol·g−1·h−1, which is 19 times higher than that of pristine In2O3. Moreover, the IO@5A-5wt% composite maintains acceptable catalytic stability after a prolonged experiment lasting 45 h and total of 108 cycles. A comprehensive series of characterization techniques and performance evaluations reveal that the incorporation of 5A molecular sieves significantly modulates the adsorption-desorption behavior and hole dynamics during photocatalytic reactions. The multi-channel architecture of 5A molecular sieves, featuring suitable pore sizes, effectively enhances CO2 adsorption. Meanwhile, the surface hydroxyl groups of 5A molecular sieves facilitate the transfer of photogenerated holes, thereby suppressing the recombination of photogenerated carriers. Additionally, the reaction product H2O desorbs more readily from the catalyst surface. These synergistic effects collectively constitute the key mechanism underlying the enhanced photocatalytic performance of the IO@5A-5wt% composite.

Key words: Molecular sieve, In2O3, Molecular-selective reservoir, Photocatalysis, CO2 hydrogenation