文献类型：期刊文献

英文题名：Catalytic performance of gold nanoparticles using different crystallinity HAP as carrier materials

作者：Wang, Jian-Dong[1];Liu, Jin-Ku[1];Lu, Yi[1];Hong, Dan-Jing[1];Yang, Xiao-Hong[2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Chizhou Univ, Dept Chem, Chizhou 247000, Peoples R China

年份：2014

卷号：55

起止页码：190

外文期刊名：MATERIALS RESEARCH BULLETIN

收录：;EI(收录号：20142017711321);WOS:【SCI-EXPANDED(收录号:WOS:000338605600031)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 21071024 and 21341007), Fundamental Research Funds for the Central Universities (No. 222201313005) and State Key Laboratory of Pollution Control and Resource Reuse Foundation (No. PCRRF13019).

语种：英文

外文关键词：Nanostructures; Inorganic compounds; Metals; Crystal structure; Catalytic properties

摘要：Gold (Au) was loaded on hydroxyapatite (HAP) supports with three different degree of crystallinity by deposition-precipitation method. Amorphous HAP and higher crystalline HAP nanoparticles were synthesized respectively by a direct precipitation process of which the aging time was 12 h or hydrothermal treatment at 180 degrees C. CO oxidation reaction was used to evaluate the behavior of catalysts. The physical properties of the catalysts were characterized by BET and TEM. The result found the catalyst with the lowest specific surface area had the highest initial activity. Patterns of XRD and XPS revealed that the HAP supports with higher crystallinity could produce more Au degrees over their surface which resulted in higher initial activity. This study suggested that the crystallinity of HAP supporter was another main factor to improve catalytic activity despite of specific surface area of the Au/HAP nanocatalysts. (C) 2014 Elsevier Ltd. All rights reserved.