SrWO4光催化剂的制备及其光催化降解盐酸金霉素的研究

doi:10.3969/j.issn.2097-2806.2023.12.003

摘要/Abstract

摘要：

通过草酸络合法合成了具有高的氧缺陷和[WO₄]四面体晶格扭曲的钨酸锶（SrWO₄）光催化剂。SrWO₄光催化剂为四方相，颗粒近似呈球形，不含其它任何杂质。颗粒间出现了少许粘连团聚现象，平均颗粒尺寸约为70 nm。在280 nm波长的峰激发下，SrWO₄光催化剂有两个明显的蓝光发射峰位于400和440 nm。以盐酸金霉素为目标降解抗生素，研究了不同抗生素质量浓度、催化剂含量和pH值对SrWO₄光催化剂光催化活性的影响规律。实验证实，SrWO₄光催化剂降解盐酸金霉素时的较佳抗生素质量浓度为100 mg/L、催化剂含量为1 g/L和pH值为5.6。机理分析表明，SrWO₄光催化剂中具有的氧缺陷和[WO₄]四面体的晶格扭曲，使得它同时具有高的光致发光性能和光催化活性。

关键词: 光催化, 草酸络合法, 钨酸锶（SrWO₄）, 发射峰, 氧缺陷, 晶格扭曲

Abstract:

The strontium tungstate （SrWO₄） photocatalyst with high oxygen defect and [WO₄] tetrahedral lattice distortion was synthesized by oxalic acid complexation method. The SrWO₄ photocatalyst was tetragonal phase, and the particles were approximately spherical and did not contain any impurities. There was a slight adhesion and agglomeration among the particles, and the average particle size was approximately 70 nm. The SrWO₄ photocatalyst exhibited two distinct blue emission peaks at 400 and 440 nm under the excitation peak of 280 nm. Chlortetracycline hydrochloride was used as the target antibiotic to be degraded. The effects of antibiotic concentration, catalyst content and pH value on the photocatalytic activity of SrWO₄ photocatalyst were studied. The experimental results showed that, the optimum antibiotic concentration, catalyst content and pH value for SrWO₄ photocatalyst to degrade chlortetracycline hydrochloride were 100 mg/L, 1 g/L and 5.6, respectively. The mechanism analysis showed that the oxygen defect and the lattice distortion of [WO₄] tetrahedron in SrWO₄ photocatalyst led to high photoluminescence and photocatalytic activity at the same time.

Key words: photocatalysis, oxalic acid complexation, strontium tungstate （SrWO₄）, emission peak, oxygen defect, lattice distortion

中图分类号:

TQ034

刘慧婷, 杜隆达, 覃礼堂. SrWO₄光催化剂的制备及其光催化降解盐酸金霉素的研究[J]. 日用化学工业（中英文）, 2023, 53(12): 1377-1384.

Huiting Liu, Longda Du, Litang Qin. Preparation of SrWO₄ photocatalyst and its photocatalytic degradation of chlortetracycline hydrochloride[J]. China Surfactant Detergent & Cosmetics, 2023, 53(12): 1377-1384.

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SrWO₄光催化剂的制备及其光催化降解盐酸金霉素的研究

Preparation of SrWO₄ photocatalyst and its photocatalytic degradation of chlortetracycline hydrochloride

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