水中敌草隆的光催化降解--Rh 浸渍对 P25 可见光活性的影响

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-10-19 DOI:10.1016/j.jwpe.2024.106323

Jennyffer Stefania Martinez Quimbayo , Manoj Kumar Ghosalya , Assa Aravindh Sasikala Devi , Juha Ahola , Rafal Sliz , Marko Huttula , Matti Alatalo , Samuli Urpelainen , Satu Ojala

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引用次数: 0

摘要

最近，人们致力于开发可见光激活的光催化剂，以降解水中新出现的污染物。本研究通过各种实验方法和建模研究了添加 Rh 对二氧化钛降解二脲的光催化性能的影响。研究人员合成、表征了三种不同 Rh 负载（0.5%、1% 和 2%）的样品，并评估了它们的活性。研究发现，RhP25 在白光照射下的活性随着 Rh 含量的增加而提高。在 Rh 含量较低时，Rh 原子与 Ti 相互作用，并可能稳定在 TiO2 晶格中。当 Rh 含量较高时，Rh 与 O 原子相互作用，在二氧化钛表面形成两个不同的簇 Rh3O4 和 Rh4O6。这一现象得到了 DFT、XPS 和 XRD 结果的证实。Rh 的加入在二氧化钛中诱导出新的电子态，增强了对可见光的吸收。光催化实验表明，与 P25 相比，2%RhP25 在白光照射下对二脲的去除率提高了三倍，降解率达到 23%，而未添加 Rh 的 P25 降解率仅为 7%。此外，重复实验也没有发现活性明显下降。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Photocatalytic degradation of Diuron in water – Impact of Rh impregnation on P25 visible light activity

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Photocatalytic degradation of Diuron in water – Impact of Rh impregnation on P25 visible light activity

Significant efforts have lately been dedicated to the development of visible light activated photocatalysts for the degradation of emerging pollutants in water. This study shows the impact of Rh addition on the photocatalytic performance of TiO₂ in Diuron degradation through various experimental approaches and modelling. Three samples with different Rh loading (0.5 %, 1 %, and 2 %) were synthesized, characterized, and their activities were evaluated. It was observed that the activity of RhP25 improved under white light irradiation with increasing Rh content. At low Rh loadings the Rh atoms interact with Ti and may be stabilized in the TiO₂ lattice. At higher loadings Rh interacts with the O atoms forming two different clusters Rh₃O₄ and Rh₄O₆ on the TiO₂ surface. This phenomenon was evidenced by DFT, XPS and XRD results. The addition of Rh induce new electronic states in the TiO₂ enhancing the visible light absorption. Photocatalytic experiments revealed a threefold increase in Diuron removal under white light irradiation for 2%RhP25 compared to P25, achieving 23 % degradation in comparison with the 7 % observed for the P25 without the Rh addition. Furthermore, repeated experiments did not show significant deterioration of the activity.

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies