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负载的铁（III）离子显著提高了TiO用于光催化消除NO的NO氧化速率和选择性。

Grafted iron(iii) ions significantly enhance NO oxidation rate and selectivity of TiO for photocatalytic NO abatement.

作者信息

Patzsch Julia, Spencer Jacob N, Folli Andrea, Bloh Jonathan Z

机构信息

DECHEMA-Forschungsinstitut Theodor-Heuss-Allee 25 60486 Frankfurt am Main Germany

School of Chemistry, Cardiff University Main Building, Park Place Cardiff CF10 3AT Wales UK.

出版信息

RSC Adv. 2018 Aug 3;8(49):27674-27685. doi: 10.1039/c8ra05017a. eCollection 2018 Aug 2.

DOI:10.1039/c8ra05017a
PMID:35542738
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9084282/
Abstract

Semiconductor photocatalysis could be an effective means to combat nitrogen oxides (NO ) based air pollution through mineralisation of NO to nitrate. However, most of the typically TiO-based catalysts employed show a much higher reactivity towards NO than NO, leading to an accumulation of this unwanted and toxic intermediate. By grafting the photocatalyst with small amounts (≤0.1 at%) of isolated iron(iii) ions, the reactivity towards NO is increased by the factor of 9, bringing it up to par with the NO-reactivity and alleviating the problem with intermediate accumulation. Consequently, the observed selectivity of the reaction is dramatically increased from less than 40% to more than 90%. The paper also discusses possible mechanisms for this very beneficial behavior.

摘要

半导体光催化可能是一种通过将氮氧化物（NO ）矿化为硝酸盐来对抗基于氮氧化物的空气污染的有效手段。然而，大多数常用的典型TiO基催化剂对NO的反应性比对NO 的反应性高得多，导致这种不需要的有毒中间体的积累。通过用少量（≤0.1原子%）孤立的铁（III）离子接枝光催化剂，对NO的反应性提高了9倍，使其与对NO的反应性相当，并缓解了中间体积累的问题。因此，观察到的反应选择性从不到40%显著提高到超过90%。本文还讨论了这种非常有益行为的可能机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e60/9084282/6da4e6fa8218/c8ra05017a-f12.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e60/9084282/6da4e6fa8218/c8ra05017a-f12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e60/9084282/bbda63b84cf9/c8ra05017a-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e60/9084282/977bbd62687c/c8ra05017a-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e60/9084282/0db3934f7029/c8ra05017a-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e60/9084282/881820cba20d/c8ra05017a-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e60/9084282/b1d113fe4f76/c8ra05017a-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e60/9084282/18829294a93d/c8ra05017a-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7e60/9084282/6da4e6fa8218/c8ra05017a-f12.jpg

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