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首页> 外文期刊>Journal of Materials Research >Effects of zinc(Ⅱ)and iron(Ⅲ)doping of titania films on their photoreactivity to decompose rhodamine B
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Effects of zinc(Ⅱ)and iron(Ⅲ)doping of titania films on their photoreactivity to decompose rhodamine B

机译：二氧化钛薄膜中锌（Zn）和铁（Ⅲ）的掺杂对其光化学降解罗丹明B的影响

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摘要

The heterogeneous photocatalytic oxidation of rhodamine B in aqueous solution containing pure of zinc(iron)-doped titania films has been studied. N-deethylation of rhodamine B was accelerated by iron(Ⅲ)and zinc(Ⅱ)doping as compared with pure titania film. It is shown that improvement of electron transfer from dye molecules to the film may be responsible for the high N-deethylation rate for iron-doped(0.5 mol/100) film, while for zinc-doped(20 mol/100)film, high surface roughness may be the main reason. In addition, both iron and zinc doping brought a new shallow trap to the intragap meaning that the surface defects had increased after doping; this is a possible reason doped films present relative low photoreactivity to catalyze the direct degradation of dye molecules.
机译：研究了罗丹明B在纯锌（铁）掺杂二氧化钛薄膜水溶液中的非均相光催化氧化作用。与纯二氧化钛相比，铁（Ⅲ）和锌（Ⅱ）的掺杂促进了若丹明B的N-脱乙基反应。结果表明，从铁分子到染料的电子转移的改善可能是掺杂铁（0.5 mol / 100）的膜的高N-脱乙基率，而掺杂锌（20 mol / 100）的膜的高的N-脱乙基率。表面粗糙度可能是主要原因。另外，铁和锌的掺杂都为能隙提供了一个新的浅陷阱，这意味着掺杂后表面缺陷增加了。这可能是掺杂膜呈现较低的光反应性以催化染料分子直接降解的可能原因。

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