摘要
ZrW2O7(OH,Cl)2·2H2O and its isomorphs were prepared by Acidic Steam Hydrothermal (ASH) method and the pure cubic ZrW2O8 was synthesized by dehydration of ZrW2O7(OH,Cl)2·2H2O. The control factors of ASH method, such as the type, concentration and volume of the acidic steam source, temperature and time of the reac- tion, were studied in detail. The results showed that HCl was a better volatile acidic steam source and the con- centration of HCl determined the product. At lower concentration of HCl, the main product was Na2W2O7·H2O rather than ZrW2O7(OH,Cl)2·2H2O. When the concentration was higher than 6 mol·L-1, the products in turn be- came sodium tungstates with the structure types of pyrochlore, hexagonal tungsten bronze and finally were trans- formed to ZrW2O7(OH,Cl)·22H2O precursors.
ZrW2O7（OH,Cl）2·2H2O and its isomorphs were prepared by Acidic Steam Hydrothermal （ASH） method and the pure cubic ZrW2O8 was synthesized by dehydration of ZrW2O7（OH,Cl）2·2H2O. The control factors of ASH method, such as the type, concentration and volume of the acidic steam source, temperature and time of the reaction, were studied in detail. The results showed that HCl was a better volatile acidic steam source and the concentration of HCl determined the product. At lower concentration of HCl, the main product was Na2W2O7·H2O rather than ZrW2O7（OH,Cl）2·2H2O. When the concentration was higher than 6 mol·L^-1, the products in turn became sodium tungstates with the structure types of pyrochlore, hexagonal tungsten bronze and finally were transformed to ZrW2O7（OH,C1）2·2H2O precursors.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2005年第9期1357-1362,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.20471010)
北京市无机化学重点学科资助项目
