杭州师范大学学报（自然科学版）2024，Vol.23Issue(4)：408-415,8.DOI:10.19926/j.cnki.issn.1674-232X.2024.02.041
纳米Pd@Fe/TiO2光催化选择性还原硝酸盐和亚硝酸盐
Photocatalytic Selected Reduction of Nitrate and Nitrite by Nano-Pd@Fe/TiO2
摘要
Abstract
A series of ternary Pd@Fe/TiO2 catalysts were fabricated by microwave hydrothermal and photoreduction method for ultraviolet visible(UV-Vis)photoreduction of nitrate and nitrite.Compared with pure Fe/TiO2,1%Pd@Fe/TiO2 catalyst showed enhanced photocatalytic performance under the condition of UV-Vis,hypoxia and no hydrogen source,and 93.4%nitrate and 90.5%nitrite were removed within 180 min.The dynamics conformed to the first-order attenuation model showed that the optimal rate constant of 1%Pd@Fe/TiO2 was 3.16 times of Fe/TiO2 and 4.92 times of TiO2,respectively.The enhanced activity is due to the extension of the spectrum absorption range of the Schottky barrier between Fe and TiO2 and the surface effect of Pd.The repeatability test of 1%Pd@Fe/TiO2 showed that the sample had high stability.In addition,the effect of Pd loading on nitrate selectivity and the mechanism of photocatalytic nitrogen removal were studied and discussed in detail.关键词
硝态氮/Pd@Fe/TiO2/光催化脱硝/紫外可见光/还原机制Key words
nitrate nitrogen/Pd@Fe/TiO2/photocatalytic denitrification/UV-Vis light/reductive mechanisms分类
资源环境引用本文复制引用
丁佳锋,吴云艳,李楚俏,温特尔,乐耀,严雯,孟芸娟,张杭君..纳米Pd@Fe/TiO2光催化选择性还原硝酸盐和亚硝酸盐[J].杭州师范大学学报（自然科学版）,2024,23(4):408-415,8.基金项目
浙江省重点研发计划项目(2021C02048). （2021C02048）
