Adsorption Properties of Novel Materials Based on the InP–ZnS System

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Inorganic Materials: Applied Research Pub Date : 2022-07-19 DOI:10.1134/S2075113322040190

I. A. Kirovskaya, R. V. Ekkert, A. O. Ekkert, N. V. Chernous

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Abstract—

Adsorption properties of solid solutions and binary components of the InP–ZnS system with respect to NO₂ and NH₃ in the temperature intervals of 250–490 K and initial pressures of 15–30 Pa have been studied for the first time. In selecting adsorbates, their unequal electron nature and toxicity is taken into account. An analysis of experimental dependences of adsorption α_p = f(T), α_T = f(P), and α_T = f(t) and calculated values of differential heat, differential entropy, activation energy of adsorption, and electrical conductivity “behavior” under condition of adsorption is conducted. As a result, the temperature conditions for occurrence of physical and chemical activated adsorption are established. With regard to the results of IR spectroscopy, the studies of acid-base properties of the surfaces of the system components, and their charging under conditions of adsorption, the ideas are substantiated about the nature of active centers, the role of which is taken by surface coordinately unsaturated atoms (primarily In and Zn atoms) and about the donor-acceptor mechanism of gas adsorption with gases participating as acceptors. Increased activity of the surfaces of the system semiconductors with respect to basic gases, which is confirmed unambiguously by the direct adsorption studies, and also the change in electrical conductivity under conditions of adsorption even at room temperature have been the basis for recommending the studied semiconductors to be used for fabricating the corresponding low-temperature sensors.

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基于InP-ZnS体系的新型材料吸附性能研究

摘要首次研究了InP-ZnS体系固溶体和二元组分在250 ~ 490 K温度区间和15 ~ 30 Pa初始压力范围内对NO2和NH3的吸附性能。在选择吸附剂时，要考虑它们的不等电子性质和毒性。分析了吸附αp = f(T)、αT = f(P)和αT = f(T)的实验依赖关系，并计算了吸附条件下的微分热、微分熵、吸附活化能和电导率“行为”。建立了发生物理和化学活性吸附的温度条件。通过红外光谱分析、系统组分表面酸碱性质的研究及其在吸附条件下的电荷，证实了表面配位不饱和原子(主要是In和Zn原子)所起作用的活性中心的性质，以及气体作为受体参与的气体吸附的供体-受体机制。直接吸附研究明确地证实了系统半导体相对于碱性气体表面活性的增加，以及即使在室温下吸附条件下电导率的变化，这些都是推荐所研究的半导体用于制造相应的低温传感器的基础。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.