Band gap engineering of titanium dioxide (TiO2) nanoparticles prepared via green route and its visible light driven for environmental remediation

IF 2.5 Q2 CHEMISTRY, MULTIDISCIPLINARY Results in Chemistry Pub Date : 2024-10-01 DOI:10.1016/j.rechem.2024.101850
Yonas Etafa Tasisa , Tridib Kumar Sarma , Ramaswamy Krishnaraj , Suryakamal Sarma
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Abstract

The present study investigates the green synthesis and characterization of Calcium-doped titanium dioxide nanoparticles (Ca-TiO2 NPs) for their potential application in the degradation of organic pollutants under visible light. The nanoparticles were prepared using a simple phytosynthesis method and characterized by various spectroscopic and microanalytical techniques for structural and optical properties. From UV spectroscopic result it is observed that the energy band gap of pure titanium dioxide (TiO2) is decreased from 3.1 eV to 2.52 eV, 2.45 eV and 2.35 eV for 2 %, 5 % and 9 % Ca-doped which shows the transformation from UV to Visible light absorbance. The results obtained suggested that, the introduction of calcium significantly enhanced visible light absorption, thereby extending the photocatalytic activity into the visible spectrum. In this study, the degradation potential of Ca-TiO2 NPs was assessed through the degradation of 4-Nitro phenol and Congo red organic pollutant dyes under visible light spectrum. Results show a substantial improvement in visible light degradation compared to undoped TiO2, indicating the phenomena of calcium-doped titanium dioxide nanoparticles as efficient visible light-responsive photocatalysts for environmental remediation.

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通过绿色途径制备的二氧化钛(TiO2)纳米粒子的带隙工程及其在可见光驱动下用于环境修复
本研究调查了掺钙二氧化钛纳米粒子(Ca-TiO2 NPs)的绿色合成和表征,以了解其在可见光下降解有机污染物的潜在应用。纳米粒子采用简单的植物合成法制备,并通过各种光谱和微分析技术对其结构和光学特性进行了表征。紫外光谱结果表明,掺入 2%、5% 和 9% Ca 的纯二氧化钛(TiO2)的能带隙从 3.1 eV 减小到 2.52 eV、2.45 eV 和 2.35 eV,这表明吸收率从紫外光转变为可见光。结果表明,钙的引入大大增强了可见光的吸收,从而将光催化活性扩展到了可见光谱。本研究通过在可见光光谱下降解 4-硝基苯酚和刚果红有机染料,评估了 Ca-TiO2 NPs 的降解潜力。结果表明,与未掺杂的二氧化钛相比,钙掺杂二氧化钛纳米粒子在可见光下的降解能力大幅提高,表明钙掺杂二氧化钛纳米粒子可作为高效的可见光响应型光催化剂用于环境修复。
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来源期刊
Results in Chemistry
Results in Chemistry Chemistry-Chemistry (all)
CiteScore
2.70
自引率
8.70%
发文量
380
审稿时长
56 days
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