Simple Preparation of Flower⁃Like BiOI and Its Visible Photocatalytic Properties

doi:10.12422/j.issn.1006-396X.2025.04.010

Abstract

Abstract:

With the development of industrialization and modernization, water pollution has become increasingly serious, and the use of sunlight for water pollution degradation has become a future development trend. In this paper, flower?like BiOI photocatalyst was prepared via a solution route at room temperature without any template, and characterized by X?ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV?Vis diffuse reflectance spectra (UV?Vis DRS). As?synthesized flower?like BiOI showed better visible light photocatalytic activity for degrading Rhodamine B (RhB) than TiO₂. The experimental results of active species and electron spin resonance (ESR) measurement showed that ·O $2 -$ was the main active species in the photocatalytic degraded process of organic pollutant over flower?like BiOI, and the possible degradation mechanism was speculated. This study provides a simple and convenient synthesis method for high activity photocatalysts.

Key words: Flower?like BiOI, Photocatalysis, Visible light, Organic pollutants, Rhodamine B

摘要：

随着工业化和现代化的发展，水污染日渐严重，利用太阳光进行水污染降解已经成为未来发展的趋势。在不使用任何模板的情况下，通过溶液法在室温下制备了花瓣状碘氧化铋（BiOI）光催化剂，并通过X射线衍射仪（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和紫外可见光漫反射光谱（UV?Vis DRS）对其进行了表征；通过活性物种捕获实验和电子自旋共振（ESR）分析，推测了花瓣状BiOI光催化降解有机污染物的可能机理。结果表明，与TiO₂相比，花瓣状BiOI在降解罗丹明B（RhB）方面表现出更好的可见光光催化活性；·O $2 -$ 是花瓣状BiOI光催化降解有机污染物过程中的主要活性物种。研究为制备高活性光催化剂提供了一种简易、便捷的合成方法。

关键词: 花瓣状碘氧化铋, 光催化, 可见光, 有机污染物, 罗丹明B

CLC Number:

TQ032.4

Xingche LI, Zhimeng WANG, Lei SHI. Simple Preparation of Flower⁃Like BiOI and Its Visible Photocatalytic Properties[J]. Journal of Petrochemical Universities, 2025, 38(4): 75-80.

李星澈, 王志猛, 石磊. 花瓣状BiOI的简单合成及其可见光光催化性能[J]. 石油化工高等学校学报, 2025, 38(4): 75-80.

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URL: https://journal.lnpu.edu.cn/syhg/EN/10.12422/j.issn.1006-396X.2025.04.010

https://journal.lnpu.edu.cn/syhg/EN/Y2025/V38/I4/75

Figures/Tables 8

Fig.1 The standard curve of Rhodamine B

Fig.2 XRD pattern of flower?like BiOI

Fig.3 SEM, TEM and HRTEM images of flower?like BiOI

Fig.4 Ultraviolet?visible diffuse reflection pattern of flower?like BiOI and corresponding band gap

Fig.5 Nitrogen adsorption?desorption isotherms of flower?like BiOI

Fig.6 The curve of petal shaped BiOI photocatalytic degradation of RhB

Fig.7 shows the active species capture experiment of flower?like BiOI and the ESR spectrum of DMPO-?O2- in methanol

Fig.8 Photocatalytic mechanism diagram of flower?like BiOI under visible light irradiation

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