Influence of Particle Sizes of Zinc and Titanium Oxides on Their Activity in Metronidazole Photocatalytic Oxidative Degradation in Water

IF 0.7 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY
V. O. Zazhigalov, E. V. Zabolotnii, V. M. Kordan, M. M. Kurmach
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引用次数: 0

Abstract

Mechanochemical (MCT) and ultrasonic (UST) treatments have been used to change the particle sizes of photoactive oxides ZnO and TiO2 and their mixtures with inert oxides (MgO, Al2O3, and SiO2). It is shown that MCT leads to a significant decrease in the size of particles, while UST either does not affect their size or leads to an insignificant increase in their size due to aggregation. It is established that a decrease in particle size is accompanied by an increase in the band gap. The dilution of photoactive oxides decreases the metronidazole oxidative destruction rate constant. The reaction rate constant, which refers to a unit mass of a photoactive oxide, and metronidazole conversion decrease for all samples when the size of photoactive oxide particles is decreased (in the range of 20-50 nm).

Abstract Image

氧化锌和氧化钛的粒度对它们在水中光催化氧化降解甲硝唑活性的影响
机械化学(MCT)和超声波(UST)处理被用来改变光活性氧化物 ZnO 和 TiO2 及其与惰性氧化物(MgO、Al2O3 和 SiO2)混合物的粒度。研究表明,MCT 会导致颗粒尺寸显著减小,而 UST 则不会影响颗粒尺寸,或者由于聚集而导致颗粒尺寸显著增大。可以确定的是,颗粒尺寸的减小伴随着带隙的增大。光活性氧化物的稀释会降低甲硝唑的氧化破坏速率常数。当光活性氧化物颗粒的尺寸减小(在 20-50 纳米的范围内)时,所有样品的反应速率常数(指单位质量的光活性氧化物)和甲硝唑转化率都会降低。
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来源期刊
Theoretical and Experimental Chemistry
Theoretical and Experimental Chemistry CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
1.60
自引率
10.00%
发文量
30
审稿时长
6-12 weeks
期刊介绍: Theoretical and Experimental Chemistry is a journal for the rapid publication of research communications and reviews on modern problems of physical chemistry such as: a) physicochemical bases, principles, and methods for creation of novel processes, compounds, and materials; b) physicochemical principles of chemical process control, influence of external physical forces on chemical reactions; c) physical nanochemistry, nanostructures and nanomaterials, functional nanomaterials, size-dependent properties of materials.
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