Photocatalytic and antibacterial performance of hydrothermally synthesized calcium oxide nanoparticles for environmental applications

IF 3.4 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Environmental Science and Technology Pub Date : 2026-09-30 DOI:10.1007/s13762-026-07473-x

M. Imran, N. Siddique, I. Ali, Z. H. Shah, M. F. Nasir, M. Tahir, M. B. Riaz

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Abstract

Due to their physicochemical stability, surface reactivity and biological activity, calcium oxide nanoparticles have emerged as promising multifunctional nanomaterials for the purpose of treatment of environmental pollution and microbial contamination. Calcium oxide nanoparticles are synthesized in the present study by the hydrothermal method. The formation of phase-pure crystalline calcium oxide with a cubic crystal structure is confirmed by the X-ray diffraction analysis. UV visible analysis reveals strong absorption peak at 298 nm. Scanning electron microscopy confirms the uniform morphology. Zeta potential analysis reveals a surface charge of − 29.3 ± 1.46 mV indicating good colloidal stability. DPPH assay shows maximum radical scavenging activity of 86 ± 2.39% and demonstrats good antibacterial activity against E. coli with maximum zone of inhibition (25 ± 0.75 mm). Furthermore, calcium oxide nanoparticles are exhibited efficient photocatalytic degradation of methylene blue, methyl orange and methyl red dye achieving 92%, 89% and 86% degradation efficiencies within 75 min under sunlight exposure. Based on these results, hydrothermally synthesized calcium oxide nanoparticles are promising materials for sunlight-assisted wastewater treatment as well as control of microbial pollution with significant potential for sustainable environmental remediation applications.

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水热合成的环境用氧化钙纳米颗粒的光催化和抗菌性能

氧化钙纳米颗粒具有良好的物理化学稳定性、表面反应性和生物活性，是一种很有前途的多功能纳米材料，可用于环境污染和微生物污染的治理。本文采用水热法制备了氧化钙纳米颗粒。x射线衍射分析证实了形成了具有立方晶体结构的相纯氧化钙晶体。紫外可见分析显示在298 nm处有很强的吸收峰。扫描电镜证实其形态均匀。Zeta电位分析显示，表面电荷为−29.3±1.46 mV，表明胶体稳定性良好。DPPH对大肠杆菌的最大自由基清除率为86±2.39%，对大肠杆菌的最大抑制区为25±0.75 mm，具有良好的抗菌活性。此外，氧化钙纳米颗粒对亚甲基蓝、甲基橙和甲基红染料的光催化降解效率在75 min内达到92%、89%和86%。基于这些结果，水热合成的氧化钙纳米颗粒是一种很有前景的材料，用于日光辅助废水处理和微生物污染控制，具有巨大的可持续环境修复应用潜力。

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

International Journal of Environmental Science and Technology 环境科学-环境科学

CiteScore

5.60

自引率

6.50%

发文量

806

审稿时长

10.8 months

期刊介绍： International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.