Structural, optical, photocatalytic and thermal behaviour of (Nb, Ta) co-doped WO3 nanoparticles and its application in photocatalytic degradation of MG and RhB dyes

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2024-10-14 DOI:10.1016/j.optmat.2024.116277

Manjeet Pawar , Poonam Nain , Saruchi Rani , Bharti Sharma , Sushil Kumar , M.A. Majeed Khan

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引用次数: 0

Abstract

In this communication, eco-friendly, cost effective and facile hydrothermal route was adopted to synthesize pure WO₃, Nb-doped WO₃ and (Nb, Ta) co-doped WO₃ nanoparticles. Phase, lattice constants, crystallite size and crystallinity have been evaluated through X-ray diffraction. The insertion of Nb and Ta ions into WO₃ nanoparticles was confirmed by XPS, FTIR and EDS studies. HRTEM and SAED micrographs exhibited highly nanocrystalline nature of samples. UV–visible studies was carried out to analyse nature of band gap, band gap energy, extinction coefficient, refractive index, Urbach energy and optical conductivity of prepared samples. Optical band gap was narrowed from 2.94 to 2.49 eV and Urbach energy was extended from 0.08 to 0.35 eV through co-doping of (Nb, Ta) ions into WO₃ NPs. Reduction in PL intensity revealed that electron-hole pair recombination rate was decreased with co-doping of (Nb, Ta) ions. The photo-degradation efficiency of (Nb 5 %, Ta 5 %) co-doped WO₃ nanophotocatalysts was 93.12 % against MG and 90.11 % against RhB dyes. The rate constant was found to be increased from 0.0107 to 0.0203 min⁻¹ for MG and 0.0086 to 0.0174 min⁻¹ for RhB. Thermal results exhibited the weight loss in three phase degradation processes, and thermal stability. The results showed that (Nb 5 %, Ta 5 %) co-doped WO₃ NPs is a potential candidate for practical applications in environmental remediation (organic dyes degradation).

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共掺杂（Nb、Ta）WO3 纳米粒子的结构、光学、光催化和热行为及其在光催化降解 MG 和 RhB 染料中的应用

在这篇通讯中，采用了环保、经济、简便的水热法路线合成了纯 WO3、掺铌 WO3 和（铌、钽）共掺 WO3 纳米粒子。通过 X 射线衍射评估了相位、晶格常数、晶粒尺寸和结晶度。XPS、FTIR 和 EDS 研究证实了 Nb 和 Ta 离子在 WO3 纳米粒子中的插入。HRTEM 和 SAED 显微照片显示了样品的高度纳米结晶性。紫外-可见光研究分析了制备样品的带隙性质、带隙能、消光系数、折射率、厄巴赫能和光导率。通过在 WO3 NPs 中掺入（Nb、Ta）离子，光带隙从 2.94 eV 缩小到 2.49 eV，Urbach 能从 0.08 eV 提高到 0.35 eV。聚光强度的降低表明，电子-空穴对重组率随着（Nb、Ta）离子的共掺杂而降低。共掺杂（Nb 5%、Ta 5%）的 WO3 纳米光催化剂对 MG 和 RhB 染料的光降解效率分别为 93.12% 和 90.11%。发现 MG 的速率常数从 0.0107 min-1 增加到 0.0203 min-1，RhB 的速率常数从 0.0086 min-1 增加到 0.0174 min-1。热结果显示了三相降解过程中的重量损失和热稳定性。结果表明，（Nb 5 %、Ta 5 %）共掺杂 WO3 NPs 有可能在环境修复（有机染料降解）中得到实际应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.