The photocatalytic activity of transition metal dichalcogenides (TMDCs) can be improved by loading them on carbon materials, which can reduce the recombination of photogenerated electrons and holes. However, the already existing approaches to producing carbon–TMDC nanocomposites have been complicated and time-consuming, and have involved the use of organic solvents or sometimes of dangerous chemicals. Here, we report a one-step strategy for the large-scale in situ synthesis of C [email protected]₂ (M = W or Mo; X = S or Se) nanoplates core–shell composites simply by heating mixtures of cheap polyacrylonitrile fibers and metal oxides in S or Se vapor. The photocatalytic performance of the as-synthesized composites was evaluated by the degradation of methylene blue, rhodamine B, Cr(VI), and E. coli. Surprisingly, such composites exhibited greatly improved photocatalytic activity and excellent stability under full-spectrum light irradiation. This strategy is a general, low-cost, and environmentally friendly solution for the synthesis of highly efficient semiconductor photocatalysts for industrial applications.

通过将过渡金属二卤化物（TMDC）负载在碳材料上，可以提高它们的光催化活性，这可以减少光生电子和空穴的复合。但是，生产碳-TMDC纳米复合材料的现有方法复杂且耗时，并且涉及使用有机溶剂或有时使用危险的化学物质。在这里，我们报告了一种通过简单地加热廉价聚丙烯腈纤维混合物来大规模原位合成C [受电子邮件保护] ₂（M = W或Mo； X = S或Se）纳米板核-壳复合材料的一步策略。以及S或Se蒸气中的金属氧化物。通过亚甲基蓝，若丹明B，Cr（VI）和大肠杆菌的降解来评估合成后的复合材料的光催化性能。。出人意料的是，这样的复合物在全光谱光辐照下表现出大大改善的光催化活性和优异的稳定性。该策略是用于工业应用的高效半导体光催化剂合成的通用，低成本和环境友好的解决方案。