Highly oriented MoS₂@CdIn₂S₄ (CISM) heterostructured photocatalyst is reported herein forefficient hydrogen evolution and CO₂ reduction applications. The catalyst is prepared by a simple hydrothermal method by varying MoS₂ (0, 0.5, 1 and 1.5 wt%) and made a series of catalysts namely CIS, CISM0.5, CISM1 and CISM1.5, respectively for this study. The synthesized p–n heterojunction CISM1 photocatalyst showed efficient transfer of photoinduced carriers as well as close interfacial contact between MoS₂ and CdIn₂S₄ in the hierarchical pseudo-spherical network. The catalyst CISM1 exhibits a hydrogen evolution rate of 2365$\mathrm{\mu }$ $\mathrm{m}$ol.g⁻¹h${}^{\mathrm{-1}}$ which is two times higher than that of pristine CdIn₂S${}_4$ ($1295\mathrm{\mu }\mathrm{m}$ol$\cdot$g⁻¹h⁻¹). Additionally, the photocatalytic reduction of CO₂ to methanol has been explored. The conversation rate methanol formation is in the order of CISM1>CISM1.5>CISM0.5>CIS>MoS₂ as 1276, 1066, 856, 544 and $253\mathrm{\mu }\mathrm{m}$ol.g⁻¹h⁻¹.cat, respectively. The photoelectrochemical study reveals that CISM1 exhibits 3 times higher in transition photocurrent (CISM1, 2.$25\mathrm{\mu }\mathrm{A}$/cm²) compared to pristine material (CIS, 0.$85\mathrm{\mu }\mathrm{A}$/cm ²). The formation of heterojunction between MoS₂ and CdIn₂S₄ furthermore, provides an exquisite mechanism for tuning the band potential for enhanced photocatalytic activity. Time-resolved photoluminescence decay spectra of CIS and CISM1 show a longer average lifetime of 3.3 ns and 4.1 ns, respectively. Notably, the photocatalyst shows excellent stability and potential application in renewable fuel generation.

本文报道了高度取向的MoS ₂ @CdIn ₂ S ₄（CISM）异质结构光催化剂，用于有效的氢气释放和CO ₂还原应用。通过简单的水热法，通过改变MoS ₂（0、0.5、1和1.5 wt％）制备该催化剂，并针对本研究分别制成了一系列催化剂，即CIS，CISM0.5，CISM1和CISM1.5。合成的p–n异质结CISM1光催化剂显示出光诱导载流子的有效转移，以及在分级伪球形网络中MoS ₂和CdIn ₂ S ₄之间的紧密界面接触。催化剂CISM1的析氢速率为2365$\mathrm{\mu }$ $\mathrm{米}$ol.g ^-1小时${}^{\mathrm{-1}}$是原始CdIn ₂ S的两倍${}_4$ （$1295\mathrm{\mu }\mathrm{米}$醇$\cdot$g ^-1 h ^-1）。另外，已经探索了将CO ₂光催化还原为甲醇。甲醇的形成速率按CISM1> CISM1.5> CISM0.5> CIS> MoS ₂的顺序依次为1276、1066、856、544和$253\mathrm{\mu }\mathrm{米}$分别为：ol.g ^-1 h ^-1 .cat。光电化学研究表明，CISM1的跃迁光电流高3倍（CISM1，2。$25\mathrm{\mu }\mathrm{一种}$/ cm ²）与原始材料（CIS，0。$85\mathrm{\mu }\mathrm{一种}$/ cm ²）。此外，在MoS ₂和CdIn ₂ S ₄之间形成异质结，为调节能带势增强光催化活性提供了一种精妙的机制。CIS和CISM1的时间分辨光致发光衰减光谱分别显示出更长的平均寿命，分别为3.3 ns和4.1 ns。值得注意的是，光催化剂显示出优异的稳定性和在可再生燃料生产中的潜在应用。