S型CdS/MnO2异质结的合理构建用于高附加值甲苯光热协同催化选择性氧化

李振 张素娟 王中辽 张金锋 陈高礼 陈士夫

引用本文: 李振, 张素娟, 王中辽, 张金锋, 陈高礼, 陈士夫. S型CdS/MnO2异质结的合理构建用于高附加值甲苯光热协同催化选择性氧化[J]. 物理化学学报, 2026, 42(4): 100179. doi: 10.1016/j.actphy.2025.100179 shu
Citation:  Zhen Li, Sujuan Zhang, Zhongliao Wang, Jinfeng Zhang, Gaoli Chen, Shifu Chen. Rational design of S-scheme CdS/MnO2 heterojunctions for high-value photothermal synergistic catalytic oxidation of toluene[J]. Acta Physico-Chimica Sinica, 2026, 42(4): 100179. doi: 10.1016/j.actphy.2025.100179 shu

S型CdS/MnO2异质结的合理构建用于高附加值甲苯光热协同催化选择性氧化

    通讯作者: Email: zhangsujuancgl@163.com (张素娟); gaolichen@chnu.edu.cn (陈高礼); chshifu@chnu.edu.cn (陈士夫); Tel: +86-561-3802061 (陈士夫); Fax: +86-561-3802061 (陈士夫)
摘要: 甲苯的选择性氧化制备高附加值产物一直是催化科学中的重大挑战。为解决传统光催化效率较低的问题,本工作提出了一种光热协同策略,构筑了新型S型CdS/MnO2异质结催化剂。通过将CdS纳米颗粒负载于具有本征光热活性的MnO2上,形成致密的S型异质结结构,该结构可产生内建电场,有效促进光生载流子的快速分离并抑制其复合。同时,CdS的引入对MnO2的电子能带结构进行了调控,从而提升产物选择性。得益于上述协同效应,优化后的25% CdS/MnO2催化剂表现出优异的催化性能,在150 ℃和氧气气氛下,实现了14.1 mmol g−1 h−1的甲苯氧化速率,且对苯甲醇和苯甲醛的选择性高达90%。机理研究表明,电子顺磁共振和傅立叶变换红外光谱结果验证了光热协同效应在促进氧化过程中的关键作用。本研究不仅提出了构筑高效光热异质结的有效策略,也为温和条件下甲苯的选择性氧化提供了新的思路。

English

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