A novel ternary MoS2/MoO3/TiO2 composite for fast photocatalytic degradation of rhodamine B under visible-light irradiation,New Journal of Chemistry

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A novel ternary MoS2/MoO3/TiO2 composite for fast photocatalytic degradation of rhodamine B under visible-light irradiation
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2019-12-03 , DOI: 10.1039/c9nj04107a
Zhenyu Li _{1,

2,

3,

4} , Fa Cao _{1,

2,

3,

4} , Lei Wang _{1,

2,

3,

4} , Zhiwu Chen _{1,

2,

3,

4} , Xiaohong Ji _{1,

2,

3,

4}

Affiliation

In this article, novel ternary MoS₂/MoO₃/TiO₂ composite catalysts were developed. The photocatalytic performance of the ternary MoS₂/MoO₃/TiO₂ composites was evaluated by photo-degradation of rhodamine B (RhB). It was found that the photocatalytic ability of the composites was strongly dependent on the mass ratio of MoS₂–MoO₃ to MoS₂–MoO₃–TiO₂. The ternary composite catalyst with optimum composition showed a fast degradation rate (maximum ∼0.138 min⁻¹), which could degrade over 95% of RhB solution (10 mg L⁻¹) within 20 min under visible light (λ > 420 nm) irradiation. The possible photocatalytic mechanism was proposed based on the trapping photocatalytic experiment and band alignment of the composite. The synergistic effect of the strong absorption of the catalyst and the efficient separation of photogenerated electron–hole pairs by the novel ternary composite contributed to the enhanced photocatalytic activity.

中文翻译：

新型三元MoS ₂ / MoO ₃ / TiO ₂复合材料在可见光下快速光催化降解若丹明B

本文开发了新型三元MoS ₂ / MoO ₃ / TiO ₂复合催化剂。通过罗丹明B（RhB）的光降解来评估三元MoS ₂ / MoO ₃ / TiO ₂复合材料的光催化性能。结果表明，复合材料的光催化能力在很大程度上取决于MoS ₂ -MoO ₃与MoS ₂ -MoO ₃ -TiO ₂的质量比。具有最佳组成的三元复合催化剂表现出快速的降解速率（最大约0.138 min ^-1），可以降解超过95％的RhB溶液（10 mg L ^-1）。）在可见光（λ > 420 nm）照射下20分钟内。基于捕获光催化实验和复合材料的能带取向，提出了可能的光催化机理。新型三元复合物对催化剂的强吸收和有效分离光生电子-空穴对的协同效应有助于增强光催化活性。

更新日期：2019-12-23

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