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首页> 外文期刊>Journal of thermal analysis and calorimetry >THE EFFECT OF K~+ION EXCHANGE ON THESTRUCTURE AND THERMAL REDUCTION OFHEXAGONAL AMMONIUM TUNGSTEN BRONZE
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THE EFFECT OF K~+ION EXCHANGE ON THESTRUCTURE AND THERMAL REDUCTION OFHEXAGONAL AMMONIUM TUNGSTEN BRONZE

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摘要

This paper discusses the changes in structure and thermal reduction of nanosize hexagonal ammonium tungsten bronze (HATB),(NH_4)_(0.33-x)WO_(3-y), which were caused by K~+ion exchange (doping) and studied XRD, XPS, ~1H-MASNMR, FTIR,SEMandTG/DTA-MS. Comparison of the cell parameters of undoped and doped HATB revealed that both a and c cell parameters decreasedafter the ion exchange reaction, which showed that smaller K~+ions partly replaced the larger NH: ions in hexagonal channels ofHATB. After the reaction, from the hexagonal channels less NH_3evolved, which also supported the incorporation of K~+ions intothe hexagonal channels.

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