Direct Z‐scheme N‐doped TiO2/MoS2 Heterojunction Photocatalyst for Photodegradation of Methylene Blue under Simulated Sunlight,ChemistrySelect

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Direct Z‐scheme N‐doped TiO2/MoS2 Heterojunction Photocatalyst for Photodegradation of Methylene Blue under Simulated Sunlight
ChemistrySelect ( IF 1.9 ) Pub Date : 2021-01-14 , DOI: 10.1002/slct.202004337
Song‐jie Li _{1,

2} , Yuan‐yuan Li ₁ , Li‐xiang Shao ₁ , Cheng‐duo Wang ₃

Affiliation

The N‐doped TiO₂/MoS₂ heterojunction with direct Z‐scheme was prepared by growing MoS₂ flowers on the surface of N‐doped TiO₂ (N‐TiO₂) spheres. The results show that the N‐TiO₂ sphere is composed of nanoparticles with the diameter of about 10 nm. The MoS₂ flowers with the diameter of 500 nm could grow homogeneously on the surface of N‐TiO₂ spheres, and the latter could prevent the accumulation of MoS₂ nanopetals. The N‐TiO₂/MoS₂ heterojunction has a narrow band gap of 2.05 eV and high activity for degrading methylene blue (MB). The degradation rate of MB by N‐TiO₂/MoS₂ can reach 97.9 % under simulated sunlight, which is much higher than those of TiO₂, MoS₂ and N‐TiO₂. Moreover, the N‐TiO₂/MoS₂ heterojunction shows a good stability and the degradation rate of MB keeps up to 85.9 % after being subjected to five cycles.

中文翻译：

直接Z方案N掺杂的TiO2 / MoS2异质结光催化剂在模拟阳光下对亚甲基蓝的光降解

通过在N掺杂的TiO ₂（N-TiO ₂）球表面上生长MoS ₂花朵，可以制备具有直接Z方案的N掺杂的TiO ₂ / MoS ₂异质结。结果表明，N‐TiO ₂球由直径约10 nm的纳米颗粒组成。直径为500 nm的MoS ₂花可以在N‐TiO ₂球表面均匀生长，而后者可以阻止MoS ₂纳米花瓣的积累。N‐TiO ₂ / MoS ₂异质结具有2.05 eV的窄带隙和高活性，可降解亚甲基蓝（MB）。在模拟阳光下，N‐TiO ₂ / MoS ₂对MB的降解率可以达到97.9％，远高于TiO ₂，MoS ₂和N‐TiO ₂。此外，N-TiO ₂ / MoS ₂异质结表现出良好的稳定性，MB经历五次循环后降解率保持高达85.9％。

更新日期：2021-01-14

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