摘要 M(II) 草酸盐(M = Mn、Co、Ni、Zn 或 Cd)与单甲基草酸铵在单甲胺存在下反应生成不同的化合物,这取决于金属原子。对于 M = Ni、Co 或 Zn,可得到具有一般经验公式 (CH3NH3)4M(C2O4)3·nH2O(其中 Zn 和 Co 的 n = 2,Ni 的 n = 1)的双草酸盐,而 M = Cd或Mn,分别得到一甲胺配合物(CH3NH3)2Cd(C2O4)2·(CH3NH2)·H2O和(CH3NH3)2Mn(C2O4)3·(CH3NH2)2·H2O。将草酸铜 (II) 溶解在浓氨水中得到二胺草酸铜 (II) 二水合物。X 射线粉末衍射图表明,除了 Co 和 Zn 的配合物是同构的外,配合物具有不同的结构。
Thermal decomposition of carbonates, carboxylates, oxalates, acetates, formates, and hydroxides
作者:Jacob Mu、D.D. Perlmutter
DOI:10.1016/0040-6031(81)80175-x
日期:1981.11
Abstract A study is reported of the controlled decomposition of various metal carbonates, carboxylates, oxalates, acetates, formates and hydroxides and their common hydrates, carried out in a thermogravimetric analyzer, a differential scanning calorimeter, and a differential thermal analyzer. Various sample sizes, heating rates, and ambient atmospheres were used to demonstrate their influence on the
polycrystalline ZnO samples have been studied: one obtained by ignition of zinc metal (Kadox) and the others obtained by decompositon of zinc carbonate and oxalate. The higher surfacereactivity found on Kadox ZnO in comparison with that found on ex-salt ZnO is not due to the preferential development of crystal planes at the surface but to the presence of better defined single microcrystals with sharp edges
desorbability of surfacehydroxyls on ZnO was investigated by three different techniques: thermaldesorption, infrared absorption spectroscopy and adsorption of water on hydroxylated ZnO. It was found that the thermaldesorption spectrum of the surfacehydroxyls has two distinct peaks at 493 and 543 K. The surfacehydroxyls on ZnO which were considered to behave as an inert surface for water physisorption
通过三种不同的技术研究了表面羟基在ZnO上的解吸能力:热解吸,红外吸收光谱法和水在羟基化ZnO上的吸附。发现表面羟基的热解吸谱在493和543 K处有两个不同的峰。ZnO上的表面羟基被认为是水物理吸附的惰性表面,因此在水的物理吸附中起重要作用。吸水等温线不连续的出现被认为是在热解吸光谱中在543 K处出现峰值的那些。此外,它们还会在红外吸收光谱中产生一个在3540 cm –1处具有峰的宽带。
Graphene based nanoassembly for simultaneous detection and degradation of harmful organic contaminants from aqueous solution
作者:R. Ajay Rakkesh、D. Durgalakshmi、S. Balakumar
DOI:10.1039/c6ra01784c
日期:——
detection and degradation of organic contaminants. The results in the present study show that the enhancement in the photocatalytic activity is attributed to the interfacial charge transfer effect in ZnO–Ag–GNS interfaces. This new design exhibits an efficient photocatalytic degradation of organicdye under sunlight irradiation. This could have great potential for a high sensing, stable and reusable material