Barium-doped ZnO nanorods fabricated via Piper nigrum leaf extract: a green route for enhanced photocatalytic efficiency

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-24 DOI:10.1007/s11144-024-02742-7

Muhammad Maqsood Ahmad Khan, Shoaib Siddique, Muhammad Khalil Ahmad Khan, Bo-Tau Liu, Aniza Latif

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Abstract

Herein, for the very first time, barium-doped ZnO nanorods (Ba-ZnO NRs) with varying Ba concentration were fabricated using black pepper (Piper nigrum) leaf extract. X-ray diffraction (XRD) analysis revealed that the studied powder exhibits wurtzite crystal structure, and scanning electron microscope (SEM) image displays the rod-like morphology, the Ba doping changes surface roughness. As dopant content (Ba) is increased, the energy band gap decreases, which can be attributed to variations in crystallite size and substitutions of the dopant ions. In photocatalytic activity, Ba-ZnO NRs degraded antibiotic ciprofloxacin (CIP) and rhodamine B (RhB) dye more efficiently than pure ZnO NRs. Notably, CIP antibiotic and RhB dye showed 95.44 and 98.94% decomposition efficiency in 80 and 35 min under visible light, respectively, with an estimated rate constant of 0.0383 and 0.1188 min⁻¹. Based on the results of this study, Ba-ZnO NRs show promising potential for advanced wastewater treatment.

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胡椒叶提取物制备钡掺杂ZnO纳米棒：提高光催化效率的绿色途径

本文首次以黑胡椒叶提取物为原料制备了不同Ba浓度的钡掺杂ZnO纳米棒（Ba-ZnO nr）。x射线衍射（XRD）分析表明，所研究的粉末呈现纤锌矿晶体结构，扫描电镜（SEM）图像显示棒状形貌，Ba掺杂改变了表面粗糙度。随着掺杂物含量（Ba）的增加，能带隙减小，这可归因于晶粒尺寸的变化和掺杂离子的取代。在光催化活性方面，Ba-ZnO NRs比纯ZnO NRs更有效地降解抗生素环丙沙星（CIP）和罗丹明B （RhB）染料。值得注意的是，在可见光下，CIP抗生素和RhB染料在80和35 min的分解效率分别为95.44%和98.94%，估计速率常数为0.0383和0.1188 min−1。基于本研究的结果，Ba-ZnO NRs在污水深度处理中具有广阔的应用前景。

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.