Cost-effective and eco-friendly synthesis of thermally stable Sr2+ doped Bi2S3 nanoflowers for efficient adsorption and visible-light-driven photocatalytic degradation of Rhodamine-B pollutant

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2024-05-18 DOI:10.1016/j.jtice.2024.105534

Anjli Sharma , Ashima Makhija , Lalita Saini , Anil Ohlan , Sajjan Dahiya , R. Punia , A.S. Maan

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Abstract

Background

Rhodamine-B is a hazardous pollutant used in textile industries that has adverse effects on humans and aquatic life. So, there is need to develop cost-effective and efficient photocatalysts.

Methods

Sr_xBi_2-xS₃ nanoflowers with varying Sr contents have been synthesized using hydrothermal method and have been studied by TGA, XRD, Rietveld refinement, UV-DRS, FESEM with EDX, PL and Zeta potential. The photocatalytic performance has been estimated by degrading RhB pollutants under visible light illumination.

Significant Findings

The morphology of the prepared Sr_xBi_2-xS₃ nanoparticles has been observed to be flower-like. They are stable up to 645 °C as assessed by TGA. Their Rietveld refinement revealed the orthorhombic crystal structure. E_g determined using DRS falls in the range of 1.45 eV to 1.37 eV, while PL studies corroborate decreased e⁻-h⁺ pairs recombination in Sr doped samples compared to pure. The negative value of surface potential ascertained using zeta potential makes them suitable for cationic dye. The impact of dopant concentration on RhB under visible light exposure reveals x = 0.06 exhibits the highest degradation efficiency (η ∼ 92 %) in 240 min utilizing 5 mg/100 ml solution of 10 ppm dye concentration. The adsorption kinetic model is of 1st order, while photodegradation kinetics is governed by Zero^th order model.

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低成本、环保型合成热稳定掺杂 Sr2+ 的 Bi2S3 纳米花，用于高效吸附和可见光驱动的光催化降解罗丹明-B 污染物

背景罗丹明-B 是纺织工业中使用的一种有害污染物，对人类和水生生物有不良影响。方法采用水热法合成了不同 Sr 含量的 CrxBi2-xS3 纳米花，并通过 TGA、XRD、Rietveld refinement、UV-DRS、FESEM with EDX、PL 和 Zeta 电位进行了研究。通过在可见光照射下降解 RhB 污染物，对其光催化性能进行了评估。经 TGA 评估，它们在高达 645 °C 的温度下仍保持稳定。对它们的里特维尔德细化显示出了正方晶体结构。使用 DRS 测定的 Eg 值在 1.45 eV 至 1.37 eV 之间，而 PL 研究证实，与纯样品相比，掺杂锶的样品中 e-h+ 对重组减少。利用 zeta 电位确定的负表面电位值使它们适合阳离子染料。在可见光照射下，掺杂剂浓度对 RhB 的影响表明，在 240 分钟内，利用 5 mg/100 ml 的 10 ppm 染料浓度溶液，x = 0.06 的降解效率最高（η ∼ 92 %）。吸附动力学模型为一阶，而光降解动力学受零阶模型支配。

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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.