Abstract Transition metal chalcogenides (TMC) have received much attention as active photocatalysts for environmental remediation. Additionally, the removal of sulfur-containing substances such as thiophene (TP) has become a requirement in fuel processing technology. Herein, we have synthesized MoS2 nanoflakes via a sol-gel method. Subsequently, MoS2 was loaded onto reduced graphene oxide (rGO) to produce a MoS2@rGO photocatalyst. The improved MoS2@rGO photocatalyst demonstrated total photooxidative desulfurization of TP after 75 min under visible light, and it exhibited excellent recyclability. The prepared nanocomposite exhibited enhanced visible light absorption with a decrease of the bandgap from 1.92 to 1.69 eV at 15 wt% of rGO addition. The recombination of the produced charge carriers was also diminished, as confirmed by photoluminescence and photocurrent measurements in the presence of rGO. This work will shed light on using rGO-supported TMC-based photocatalysts for fuel and related industries.

中文翻译：

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可见光下还原氧化石墨烯负载的二硫化钼纳米薄片对噻吩的优异光氧化脱硫

摘要 过渡金属硫属化物（TMC）作为一种用于环境修复的活性光催化剂受到了广泛的关注。此外，去除噻吩（TP）等含硫物质已成为燃料加工技术的一项要求。在此，我们通过溶胶-凝胶法合成了 MoS2 纳米薄片。随后，将 MoS2 负载到还原氧化石墨烯 (rGO) 上以制备 MoS2@rGO 光催化剂。改进后的 MoS2@rGO 光催化剂在可见光下 75 分钟后显示出 TP 的完全光氧化脱硫，并表现出优异的可回收性。制备的纳米复合材料表现出增强的可见光吸收，在添加 15 wt% 的 rGO 时，带隙从 1.92 eV 降低到 1.69 eV。产生的电荷载流子的复合也减少了，在 rGO 存在下通过光致发光和光电流测量证实。这项工作将阐明将 rGO 支持的基于 TMC 的光催化剂用于燃料和相关行业。