非晶态块状及二氧化硅负载的氢氧化铜（II）的结构

The Structure of Amorphous Bulk and Silica-Supported Copper(II) Hydroxides.

作者信息

Kriventsov VV, Kochubey DI, Elizarova GL, Matvienko LG, Parmon VN

机构信息

Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia

出版信息

J Colloid Interface Sci. 1999 Jul 1;215(1):23-27. doi: 10.1006/jcis.1999.6214.

DOI:10.1006/jcis.1999.6214

PMID:10362468

Abstract

The data obtained show that at pH 7 copper(II) ions are adsorbed on a SiO2 surface as polymeric species of hydroxide nature. The structure of these species is similar to that of the bulk amorphous copper hydroxide. The amorphous state of supported Cu(OH)2 is caused by a small (ca. 11 Å) size of the surface particles. In contrast, the overstoicheometric water molecules seem to act as "amorphizers" of the bulk copper hydroxide. The structures of the bulk and dispersed amorphous copper(II) hydroxide were determined. The amorphous Cu(OH)2 has a layered structure close to the structure of the crystalline hydroxide, but the layers in the amorphous hydroxide are shifted toward one another approximately for 14 of the "c" period of the lattice. Copyright 1999 Academic Press.

摘要

所获得的数据表明，在pH值为7时，铜（II）离子以氢氧化物性质的聚合物种吸附在二氧化硅表面。这些物种的结构与块状无定形氢氧化铜的结构相似。负载型Cu(OH)₂的无定形状态是由表面颗粒较小（约11 Å）的尺寸引起的。相比之下，过量化学计量的水分子似乎起到了块状氢氧化铜的“非晶化剂”的作用。确定了块状和分散的无定形氢氧化铜（II）的结构。无定形Cu(OH)₂具有与结晶氢氧化铜结构相近的层状结构，但无定形氢氧化铜中的层相对于晶格“c”周期的约1/4相互偏移。版权所有1999年学术出版社。