Bio-calcium oxide derived from eggshell-titanium dioxide@graphene oxide for photodegradation of dyes and antibacterial activities

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik Pub Date : 2024-10-28 DOI:10.1016/j.ijleo.2024.172099

Nguyen Huu Hieu , Ton That Buu , Nguyen Duy Hai , Vo Minh Quan , Bo Khanh Ngoc , Dang Hai Minh Tam , Nguyen Thanh Hoai Nam , Le Gia Han , Mai Thanh Phong

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引用次数: 0

Abstract

The utilization of calcium oxide (CaO) derived from calcined eggshells is considered a primary source of materials for semiconductor incorporation, which is a facile and environmentally friendly method. This work introduces a novel composite, namely calcium oxide-titanium dioxide@graphene oxide (CaO-TiO₂@GO) with photodegradation efficiency of various organic pollutants such as crystal violet (CV), malachite green (MG), rhodamine B (RhB), and methyl orange (MO). The results showed that the synergistic efficiency of the combination of GO and CaO-TiO₂ increased the adsorption-photodegradation efficiency with the removal of CV, MG, RhB, and MO of 99.72, 99.41, 97.21, and 80.09 %, respectively. The kinetics of dye photodegradation follows a pseudo-first-order kinetics model, the reusability toward CV removal reaches over 85 % after 5 cycles, and the free radical scavenging experiment identifies that the •O₂⁻ plays a major role in the photodegradation mechanism. In addition, the fundamental antibacterial performance toward strains of Pseudomonas aeruginosa and Bacillus subtilis was reported with antibacterial inhibition diameters of 12.1 and 11.2 mm, respectively.

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蛋壳-二氧化钛@氧化石墨烯衍生的生物氧化钙在染料光降解和抗菌活性方面的应用

利用从煅烧蛋壳中提取的氧化钙（CaO）被认为是掺入半导体的主要材料来源，这是一种既简便又环保的方法。本研究介绍了一种新型复合材料，即氧化钙-二氧化钛@氧化石墨烯（CaO-TiO2@GO），其对多种有机污染物如水晶紫（CV）、孔雀石绿（MG）、罗丹明 B（RhB）和甲基橙（MO）具有光降解效率。结果表明，GO 和 CaO-TiO2 的组合协同增效提高了吸附-光降解效率，对 CV、MG、RhB 和 MO 的去除率分别为 99.72%、99.41%、97.21% 和 80.09%。染料光降解动力学遵循伪一阶动力学模型，5 次循环后去除 CV 的重复利用率达到 85% 以上，自由基清除实验表明 -O2- 在光降解机理中起主要作用。此外，该化合物还对铜绿假单胞菌和枯草芽孢杆菌菌株具有基本的抗菌性能，抑菌直径分别为 12.1 毫米和 11.2 毫米。

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来源期刊

Optik 物理-光学

CiteScore

6.90

自引率

12.90%

发文量

1471

审稿时长

46 days

期刊介绍： Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.