Dye-sensitized n-n heterojunction {001}TiO2@NH2-MIL-101(Fe) for degradation of rhodamine B under visible light

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-12-02 DOI:10.1016/j.colsurfa.2024.135886

Jia-Yi Huang , Qing-Yao Li , Jia-Yuan He , Jun-Xuan Fu , Lian-Di Zhou , Qi-Hui Zhang , Chun-Su Yuan

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引用次数: 0

Abstract

The {001}TiO₂@NH₂-MIL-101(Fe) heterojunctions (MT-x) crafted by the fusion of components {001}TiO₂ and NH₂-MIL-101(Fe) possesses an optimally positioned conduction band. Consequently, MT-x is capable of sensitizing Rhodamine B (RhB) and effectuating its degradation via a photocatalytic mechanism that is driven by visible light irradiation. Specifically, the n-n heterojunction designated as MT-3 achieved a RhB removal rate of 94.45 % within a 3-hour period, which corresponds to a 5.4-fold and 2.2-fold enhancement over the degradation rates observed for {001}TiO₂ and NH₂-MIL-101(Fe), respectively. Photo-electrocatalytic performance analyses showed that the n-n heterojunction MT-3 effectively inhibited electron-hole pair recombination. Moreover, the intimate interfacial contact between monomer materials enhanced the separation and transfer of photogenerated carriers, which indicates that MT-3 has excellent photocatalytic performance. The free radical trapping and EPR results indicated that ·O₂^- plays a major role in the photocatalytic degradation of RhB by MT-3, followed by h⁺ and ·OH. Furthermore, high-resolution liquid chromatography-mass spectrometry was employed to investigate photodegradation intermediates. The destruction of the RhB structure significantly reduced the environmental pollution associated with organic dye. The MT-x heterojunction exhibits remarkable potential for practical applications in organic contaminants removal.

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.