An Amorphous Phase of Zinc and Silicon at Composition Zn2Si5(:H, OH)

Feng Xianjuan; Boehme Bodo; Bobnar MatejSimon PaulCarrillo-Cabrera WilderBurkhardt UlrichSchmidt MarcusSchwarz UlrichBaitinger MichaelStrassner ThomasGrin Yuri

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An Amorphous Phase of Zinc and Silicon at Composition Zn2Si5(:H, OH)

机译：锌和硅的非晶相组成 Zn2Si5（：H， OH）

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摘要

An amorphous phase at composition Zn2Si5(:H,OH) was prepared by oxidation of the precursor phase Li2ZnSi at 80 degrees C in the ionic liquid of n-dodecyltrimethylammonium chloride (DTAC) and AlCl3 in 1:1 molar ratio, followed by removal of elemental zinc by dilute aqueous HCl. The product was structurally amorphous according to HRTEM, XRPD, and Raman spectroscopy. Zn2Si5(:H,OH) forms layers embedded in a matrix of a silica by-product. On annealing at 150 degrees C, amorphous Zn2Si5(:H,OH) decomposed into crystalline Zn and -Si. The decomposition comes along with the release of H-2 revealed by TG-MS studies. IR and solid-state NMR spectroscopy revealed that the Zn2Si5 bulk is terminated by Si-OH and Si-H groups. The absence of Knight shift in the Si-29 NMR signal assigned to Zn2Si5(:H,OH) suggests semiconducting behavior.

机译：将前驱体相Li2ZnSi在正十二烷基三甲基氯化铵（DTAC）和AlCl3的离子液体中以1：1摩尔比氧化，在80°C下以1：1的摩尔比氧化，然后用稀HCl水溶液除去元素锌，制备了Zn2Si5（：H，OH）的无定形相。根据HRTEM、XRPD和拉曼光谱，该产物在结构上是无定形的。Zn2Si5（：H，OH）形成嵌入二氧化硅副产物基质中的层。在150°C退火时，无定形Zn2Si5（：H，OH）分解为结晶Zn和-Si。分解伴随着TG-MS研究揭示的H-2的释放。红外和固体核磁共振波谱表明，Zn2Si5本体被Si-OH和Si-H基团终止。分配给Zn2Si5（：H，OH）的Si-29 NMR信号中没有奈特位移表明半导体行为。

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来源
《Zeitschrift fur Anorganische und Allgemeine Chemie》 |2017年第1期|106-113|共8页
作者
Feng Xianjuan; Boehme Bodo; Bobnar MatejSimon PaulCarrillo-Cabrera WilderBurkhardt UlrichSchmidt MarcusSchwarz UlrichBaitinger MichaelStrassner ThomasGrin Yuri;
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作者单位

Max Planck Inst Chem Phys Fester Stoffe, Nathnitzer Str 40, D-01187 Dresden, Germany;

Tech Univ Dresden, Fachrichtung Chem & Lebensmittelchem, D-01062 Dresden, Germany;

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原文格式 PDF
正文语种英语
中图分类化学;
关键词
Alloy; Zinc; Silicon; Oxidation; NMR spectroscopy;

机译：合金;锌;硅;氧化;核磁共振波谱;

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An Amorphous Phase of Zinc and Silicon at Composition Zn2Si5(:H, OH)

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