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首页> 外文期刊>RSC Advances >Comparative study of the photocatalytic performance for the degradation of different dyes by ZnIn2S4: adsorption, active species, and pathways
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Comparative study of the photocatalytic performance for the degradation of different dyes by ZnIn2S4: adsorption, active species, and pathways

机译：ZnIn 2 S 4 降解不同染料的光催化性能的比较研究：吸附，活性物种和途径

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摘要

A comparative study of the photocatalytic performance for the degradation of rhodamine B (RhB) and methyl orange (MO) by ZnIn2S4 under visible light irradiation was investigated based on the adsorption of dyes, the active species generated during the photocatalytic process and the degradation pathway. The results show that 97.8% of RhB and 5.6% of MO were degraded under the same conditions, respectively. Photocatalytic degradation of RhB was obviously superior to degradation of MO. The adsorption of MO was almost negligible and 56.8% of RhB was adsorbed on ZnIn2S4. Superoxide radical was the key active species, and hydroxyl radical played a supplementary role during photocatalytic process. Different chemical bonds with different bond energies were destroyed when degradation of RhB and MO. Photocatalytic degradation of RhB was superior to that of MO because the excellent adsorptivity of RhB than that of MO, and the CN bond of RhB was easier destroyed compared with azo bond of MO under the same conditions. The photocatalytic degradation of MO in a system in which superoxide radical was key active species can be improved by adding hole scavengers to inhibit recombination of holes and electrons, which would result in more electrons reducing oxygen to superoxide radical.
机译：ZnIn 2 S 4 。结果表明，在相同条件下，RhB的降解率为97.8％，MO的降解率为5.6％。 RhB的光催化降解明显优于MO的降解。 MO的吸附几乎可以忽略不计，RhB的56.8％吸附在ZnIn 2 S 4 上。超氧自由基是关键的活性物种，而羟基自由基在光催化过程中起补充作用。 RhB和MO降解时，具有不同键能的不同化学键被破坏。 RhB的光催化降解性能优于MO，因为在相同条件下，RhB的吸附性能优于MO，并且与MO的偶氮键相比，RhB的CN键更容易被破坏。通过添加空穴清除剂来抑制空穴与电子的复合，可以改善其中超氧自由基是关键活性物种的系统中MO的光催化降解，这将导致更多的电子将氧还原为超氧自由基。

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