Construction of BiOI/RGO with rapid adsorption and excellent visible light absorption efficiency based on the shielding effect of adsorbed pollutants on incident light in fast adsorption photocatalytic system

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-07-15 DOI:10.1016/j.jwpe.2025.108318

Xu Zhang , Shihui Zhang , Wanting Shi , Weiyan He , Caihong Li , Xiaojing Wang

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引用次数: 0

Abstract

In photocatalytic processes, rapid adsorption leads to significant accumulation of pollutants on the catalyst surface, which strongly shields incident light and suppresses the generation of photogenerated charge carriers. Addressing the low degradation efficiency caused by rapid adsorption in the process of tetracycline hydrochloride (TC) photodegradation with BiOI as a catalyst, BiOI/reduced graphene oxide (RGO) composite was designed and prepared by a one-step solvothermal approach. The sp²-conjugated network of RGO was successfully reconfigured through calcination and ultrasonication, effectively，Which extended π-electron delocalization of RGO and thus significantly enhanced light absorption properties of BiOI/RGO. When the photocatalytic reaction was carried out within 60 min under visible light irradiation with the prepared BiOI/RGO as the catalyst, the removal rate of TC in solution could reach 100 %, the degradation rate could reach 94 %, and the mineralization rate could reach 85 %, which were 1.37, 1.96 and 2.43 times higher than that with BiOI as catalyst. The enhanced photocatalytic performance is attributed to the excellent light absorption from RGO, the rapid adsorption capability of BiOI, and the uniform dispersion of BiOI nanoparticles on RGO surfaces leading to the exposure of abundant active sites.

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基于快速吸附光催化体系中所吸附污染物对入射光的屏蔽效应，构建具有快速吸附和优异可见光吸收效率的BiOI/RGO

在光催化过程中，快速吸附导致污染物在催化剂表面大量积聚，从而强烈屏蔽入射光，抑制光生载流子的产生。针对以BiOI为催化剂光降解盐酸四环素（TC）过程中快速吸附导致降解效率低的问题，采用一步溶剂热法设计并制备了BiOI/还原性氧化石墨烯（RGO）复合材料。通过煅烧和超声处理成功重构了RGO的sp2共轭网络，有效地扩展了RGO的π-电子离域，从而显著提高了BiOI/RGO的光吸收性能。以制备的BiOI/RGO为催化剂，在可见光照射下60 min内进行光催化反应，溶液中TC的去除率可达100%，降解率可达94%，矿化率可达85%，分别是以BiOI为催化剂的1.37倍、1.96倍和2.43倍。增强的光催化性能归因于RGO优异的光吸收能力、BiOI的快速吸附能力以及BiOI纳米颗粒在RGO表面的均匀分散，从而暴露出丰富的活性位点。

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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