The effects of TiO2 morphology and crystal on the catalytic degradation of ammonia nitrogen with ozone

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Liu, Zhiwu^1 ; Huang, Daxiang^1 ; Tang, Jing^1 ; Zheng, Chaocan^1 ; Meng, Yuan^1

JinHua Polytechnic, JinHua Zhejiang

321000, China^1

关键词: Ammonia nitrogen;    Catalyst surfaces;    Catalytic degradation;    Degussa P25;    Hydrothermal methods;    Initial degradation rate;    Rutile phase;    Surface area;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/5/052008/pdf
DOI  :  10.1088/1755-1315/170/5/052008

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

TO2 nanostructures with various morphologies and crystal structures has been synthesized by hydrothermal method using Degussa P25 as a precursor and subsequent calcination at different temperature. The zonation catalytic activities of the as-prepared samples were investigated by degradation of ammonia nitrogen aqueous solution with ozone. The effects of the phase composition, surface area and shape of the nanostructures on degradation of ammonia nitrogen were evaluated. The initial degradation rate of ammonia nitrogen had been correlated with the morphology, and crystal structure examinations done with the help of transmission electron microscopy (TEM) and X-ray diffraction (XRD). The research done demonstrated that more rutile phase and the vast surface area are favourable for the zonation catalysis. The dependence of the zonation catalytic activity on the shape of catalyst surface is not significant as usually expected.