掺铁氧化钨的水热合成及其光催化特性

IF 1.8 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR
G. S. Zakharova, N. V. Podval’naya, T. I. Gorbunova, M. G. Pervova, A. N. Enyashin
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引用次数: 0

摘要

摘要 通过水热合成法制备了通式为h-W1-xFexO3的六方h-WO3基取代固溶体,其中0.01≤x≤0.06。所制备的 h-W1-xFexO3 化合物的晶格由六边形通道中的\({text{NH}}_{4}^{ + }\) 离子稳定。量子化学计算表明,掺杂铁离子取代了钨亚晶格中的阳离子,并没有夹杂在晶格通道中。在涉及 h-W1-xFexO3 的反应中,掺杂剂不是一个独立的参与者,而只是导致 h-WO3 矩阵的近费米态重组。固溶体的掺杂剂均匀性范围由工作溶液的 pH 值决定。在 pH 值为 2.3 时制备的 h-W0.94Fe0.06O3 具有最大的比表面积,相当于 108 m2/g。它在 1,2,4- 三氯苯(TCB)光降解中的光催化活性是 m-W0.94Fe0.06O3 的数倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Hydrothermal Synthesis and Photocatalytic Properties of Iron-Doped Tungsten Oxide

Hydrothermal Synthesis and Photocatalytic Properties of Iron-Doped Tungsten Oxide

Abstract

Hexagonal h-WO3-based substitutional solid solutions of general formula h-W1–xFexO3, where 0.01 ≤ x ≤ 0.06 were prepared by hydrothermal synthesis. The crystal lattice of the prepared h-W1–xFexO3 compounds is stabilized by \({\text{NH}}_{4}^{ + }\) ions in hexagonal channels. Quantum-chemical calculations showed that dopant iron ions replace cations in the tungsten sublattice, and are not intercalated into lattice channels. The dopant is not an independent participant in reactions involving h-W1–xFexO3, but only causes the reorganization of the near-Fermi states of the h-WO3 matrix. The extent of the dopant homogeneity range of the solid solution is determined by the pH of the working solution. The h-W0.94Fe0.06O3 prepared at pH 2.3 has the largest specific surface area, equal to 108 m2/g. Its photocatalytic activity in 1,2,4-trichlorobenzene (TCB) photodegradation is several times that of m-W0.94Fe0.06O3.

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来源期刊
Russian Journal of Inorganic Chemistry
Russian Journal of Inorganic Chemistry 化学-无机化学与核化学
CiteScore
3.10
自引率
38.10%
发文量
237
审稿时长
3 months
期刊介绍: Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.
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