Scholarlink

<p>This project presents the fabrication of an efficient heterojunction photocatalyst through combining 3D MoS<sub>2</sub> nanoflowers with 2D MoO<sub>3</sub> nanobelts, both having highly prominent photocatalytic features. The prepared MoS<sub>2</sub>@MoO<sub>3</sub> heterojunction exhibited superior photocatalytic activity towards the degradation of Azo dye under visible light irradiation and attained about 96% degradation within four hours. Such a high photocatalytic activity might be associated with the high BET surface area, and especially with the S-scheme mechanism that occurs between p-type MoS<sub>2</sub> and p-type MoO<sub>3</sub>, probably due to the fact that this offers effectively separated and transitioned photogenerated electron-hole pairs, while the recombination rate is reduced. The addition of MoO<sub>3</sub> increased the bandgap of MoS<sub>2</sub> and consequently enhanced the photoinduced electron transfer rate and prolonged the lifetime of the charge carriers. In a word, the generation of hole and <sup>•</sup>O<sub>2</sub><sup>–</sup> radicals in the whole process of degradation, which have been proved by scavenger tests and Mott-Schottky analysis, proved the MoS<sub>2</sub>@MoO<sub>3</sub> p-p heterojunction to be photocatalytically active. This work underlines the successful application of bandgap and morphological engineering in the design of photocatalysts and points out the 3D/2D MoS<sub>2</sub>@MoO<sub>3</sub> heterojunction structure as the basis for further development of transition metal chalcogenide (TMC)/transition metal oxide (TMO) photocatalysts with a view to tackling important environmental problems by means of sustainable technologies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

S-scheme heterojunction of MoO3 nanobelts and MoS2 nanoflowers for photocatalytic degradation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月28日

查看全文
  • Mohammad Mahdi Rezaei,
  • Mir Saeed Seyed Dorraji,
  • Seyyedeh Fatemeh Hosseini,
  • Mohammad Hossein Rasoulifard

摘要

This project presents the fabrication of an efficient heterojunction photocatalyst through combining 3D MoS2 nanoflowers with 2D MoO3 nanobelts, both having highly prominent photocatalytic features. The prepared MoS2@MoO3 heterojunction exhibited superior photocatalytic activity towards the degradation of Azo dye under visible light irradiation and attained about 96% degradation within four hours. Such a high photocatalytic activity might be associated with the high BET surface area, and especially with the S-scheme mechanism that occurs between p-type MoS2 and p-type MoO3, probably due to the fact that this offers effectively separated and transitioned photogenerated electron-hole pairs, while the recombination rate is reduced. The addition of MoO3 increased the bandgap of MoS2 and consequently enhanced the photoinduced electron transfer rate and prolonged the lifetime of the charge carriers. In a word, the generation of hole and •O2– radicals in the whole process of degradation, which have been proved by scavenger tests and Mott-Schottky analysis, proved the MoS2@MoO3 p-p heterojunction to be photocatalytically active. This work underlines the successful application of bandgap and morphological engineering in the design of photocatalysts and points out the 3D/2D MoS2@MoO3 heterojunction structure as the basis for further development of transition metal chalcogenide (TMC)/transition metal oxide (TMO) photocatalysts with a view to tackling important environmental problems by means of sustainable technologies.