Synthesis of Phosphotungstic acid/S-doped g-C3N4 Photocatalyst and Its Photocatalytic Degradation of Organic Pollutants in Aqueous Solutions

IF 0.8 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science-medziagotyra Pub Date : 2023-06-03 DOI:10.5755/j02.ms.31053

Pengxi LI, Zhonghong LIU, Bing YANG, Zhiyong JIANG, Jingjing YANG

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Abstract

The S-doped g-C3N4 (SCN) was prepared by thermal condensation method using thiourea as a precursor, and then the phosphotungstic acid (PTA)/SCN composite photocatalytic material was prepared by reflux adsorption method. The photocatalytic degradation experiments of Rhodamine B showed that SCN20 had the highest photocatalytic degradation rate (74 %), which was 1.9 times and 3.5 times higher than that of PTA (39 %) and SCN (21 %), respectively. The photocatalytic degradation rate of SCN20 was increased by 5 times compared to that of SCN, indicating that the photocatalytic degradation performance of the composite material was significantly improved. The photocatalytic degradation mechanism study revealed that O2- was the main active species in the photocatalytic degradation of Rhodamine B, and the addition of PTA helped the effective separation of electrons-hole and improved the photocatalytic degradation rate. Our PTA/SCN is proposed as an environmental safety tool due to several advantages, such as low cost, convenient preparation, and efficient photocatalytic degradation of Rhodamine B.

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磷钨酸/ s掺杂g-C3N4光催化剂的合成及其对水溶液中有机污染物的光催化降解

以硫脲为前驱体，采用热缩合法制备了s掺杂g-C3N4 (SCN)，然后采用回流吸附法制备了磷钨酸(PTA)/SCN复合光催化材料。罗丹明B的光催化降解实验表明，SCN20的光催化降解率最高(74%)，分别是PTA(39%)和SCN(21%)的1.9倍和3.5倍。与SCN相比，SCN20的光催化降解率提高了5倍，表明复合材料的光催化降解性能得到了显著提高。光催化降解机理研究表明，O2-是光催化降解罗丹明B的主要活性物质，PTA的加入有助于电子空穴的有效分离，提高了光催化降解率。我们的PTA/SCN具有成本低、制备方便、光催化降解罗丹明B高效等优点，被认为是一种环境安全工具。

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来源期刊

Materials Science-medziagotyra 工程技术-材料科学：综合

CiteScore

1.70

自引率

10.00%

发文量

审稿时长

6-12 weeks

期刊介绍： It covers the fields of materials science concerning with the traditional engineering materials as well as advanced materials and technologies aiming at the implementation and industry applications. The variety of materials under consideration, contributes to the cooperation of scientists working in applied physics, chemistry, materials science and different fields of engineering.