Study of crystal structure, morphological, optical and photocatalytic dye degradation properties of BiVO4-Bi2S3 nanocomposites synthesised in-situ using facile and cost-effective hydrothermal method

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-05-29 DOI:10.1016/j.jtice.2025.106199

Deepika Yadav, Anjli Sharma, Anil Ohlan, Sajjan Dahiya, R. Punia, A.S. Maan

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引用次数: 0

Abstract

Background

Heterostructure photo-catalysts are in high demand for efficient photocatalytic degradation of organic contaminants in wastewater generated from the pharmaceutical and textile industries.

Methods

In this work hydrothermal method was used for synthesis of two pure nanomaterials, BiVO₄(BVO) and Bi₂S₃(BS) and their three nanocomposites with BVO:BS ratio of (1:05), (1:1), (1:2). Characterization techniques such as XRD, UV-DRS, FESEM, EDX, PL, Zeta-potential, and photocatalytic dye degradation were used to assess their optical and structural features and dye degradation efficiency.

Significant Findings

The Rietveld refinement of XRD data is performed to confirm the monoclinic phase of BVO and orthorhombic phase of BS. FESEM images of nanocomposites showed that BS rods were attached to the surface of BVO broken walnut. The optical band gap of pristine(BS and BVO) and BVOBS nanocomposites were determined using UV-DRS and found in the range 1.42–2.51 eV, which makes these nanomaterials suitable photocatalysts under visible-light exposure. The photo-catalytic degradation efficiency was tested under visible-light exposure for Rhodamine-B(RhB) dye. 10 mg of BVOBS(1:1) nanocomposite demonstrated highest degradation efficiency(96 %) compared to other nanocomposites for 10 ppm RhB solution in 180 min and obeys first-order kinetic model. The energy consumption cost is ∼Rs.12 for optimizing BVOBS(1:1) nanocomposite for degradation of 10 ppm RhB dye.

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水热法原位合成BiVO4-Bi2S3纳米复合材料的晶体结构、形貌、光学和光催化染料降解性能研究

异质结构光催化剂在高效光催化降解制药和纺织工业废水中的有机污染物方面有着很大的需求。方法采用水热法合成两种纯纳米材料BiVO4（BVO）和Bi2S3（BS）及其三种纳米复合材料，BVO:BS比分别为（1:05）、（1:1）、（1:2）。利用XRD、UV-DRS、FESEM、EDX、PL、Zeta-potential和光催化染料降解等表征技术对其光学和结构特征以及染料降解效率进行了评价。对XRD数据进行了Rietveld细化，确认了BVO的单斜相和BS的正交相。纳米复合材料的FESEM图像显示，BS棒附着在BVO破碎核桃的表面。利用UV-DRS测定了原始（BS和BVO）和BVOBS纳米复合材料的光学带隙在1.42-2.51 eV范围内，表明这些纳米材料在可见光下是合适的光催化剂。在可见光下测试了光催化降解罗丹明- b （RhB）染料的效率。与其他纳米复合材料相比，10 mg (1:1) bvos纳米复合材料在10 ppm RhB溶液中降解效率最高（96%），降解时间为180 min，符合一级动力学模型。能源消耗成本为~ Rs。12 .优化BVOBS（1:1）纳米复合材料降解10ppm RhB染料。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.