Highly Efficient Visible‐Light‐Driven Photocatalytic Hydrogen Production Using Robust Noble‐Metal‐Free Zn0.5Cd0.5S@Graphene Composites Decorated with MoS2 Nanosheets,Advanced Materials Interfaces

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Highly Efficient Visible‐Light‐Driven Photocatalytic Hydrogen Production Using Robust Noble‐Metal‐Free Zn0.5Cd0.5S@Graphene Composites Decorated with MoS2 Nanosheets
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-05-10 , DOI: 10.1002/admi.202000010
Puttaswamy Madhusudan _{1,

2,

3} , Run Shi ₁ , Bananakere Nanjegowda Chandrashekar ₁ , Shengling Xiang ₁ , Ankanahalli Shankaregowda Smitha ₁ , Weijun Wang ₁ , Haichao Zhang ₁ , Xian Zhang ₁ , Abbas Amini ₄ , Chun Cheng _{1,

2,

3}

Affiliation

Solar water splitting using semiconductor photocatalysts is considered to be one of the economical and significant techniques for hydrogen evolution. In this study, graphene–Zn_xCd₁₋_xS (ZCS) heterojunction is fabricated by hydrothermal method followed by simple photodeposition of ultrathin few layers of molybdenum sulfide (MoS₂) nanosheets. The results show that compared with pristine ZCS and 1 wt% graphene mixed ZCS photocatalysts, the 1 wt% graphene and 1 wt% MoS₂ photodeposited ZCS composited sample shows 39.5 mmol h⁻¹ g⁻¹ hydrogen production activity, which is 6.9 and 1.9 times significantly higher, respectively, with an apparent quantum yield of 53% at 420 nm visible light is recorded. The improved photocatalytic activity can be attributed to the formation of heterostructure interface between p‐type MoS₂ nanosheets with n‐type ZCS host, which allows for the faster transfer of the photogenerated electrons and thus significantly promotes the separation of photogenerated charge carriers.

中文翻译：

使用经MoS2纳米片修饰的坚固的无贵金属Zn0.5Cd0.5S @石墨烯复合材料高效生产可见光驱动的光催化氢

使用半导体光催化剂分解太阳能水被认为是产生氢的经济且重要的技术之一。在这项研究中，石墨烯-Zn _x Cd ₁ - _x S（ZCS）异质结是通过水热法，然后对几层超薄硫化钼（MoS ₂）纳米片进行简单的光沉积而制成的。结果表明，与原始ZCS和1 wt％石墨烯混合的ZCS光催化剂相比，1 wt％石墨烯和1 wt％MoS ₂光沉积的ZCS复合样品显示39.5 mmol h ^-1 g ^-1记录的氢气产生活性分别高出6.9和1.9倍，在420 nm可见光下的表观量子产率为53％。改善的光催化活性可以归因于在p型MoS ₂纳米片与n型ZCS主体之间形成异质结构界面，这使光生电子更快地转移，从而显着促进了光生载流子的分离。

更新日期：2020-05-10

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