SILAR-assisted synthesis of Cu2O modified TiO2 nanotube arrays: Study on efficient photocatalytic dye degradation and hydrogen evolution

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-10-18 DOI:10.1016/j.jwpe.2024.106364

Junwei Hou , Lin Gan , Nan Bao , Chengye Zhang , Kailu Liu , Qingyao Wang

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引用次数: 0

Abstract

Dye wastewater and energy shortage are two large inhibition factors, and photocatalytic applications have proven to be an effective strategy to overcome the above crises in various areas such as wastewater remediation and H₂ production. Herein, the TiO₂ NTs/Cu₂O photocatalyst was created by depositing Cu₂O onto TiO₂ nanotube arrays (TiO₂ NTs), with the number of successive ionic layer adsorption and reaction (SILAR) deposition cycles playing a significant role in determining the photoelectrochemical performance. The TiO₂ NTs/Cu₂O (9) showed the outstanding visible light photocurrent, pollutant removal and H₂ evolution. TiO₂ NTs/Cu₂O (9) successfully removed MO, RhB, MB and Cr(VI) with the degradation efficiencies of 99.32 %, 69.63 %, 99.27 % and 72.55 %, and it also showed the optimal H₂ evolution rate (49.67 μmol·cm⁻²·h⁻¹). Furthermore, the Z-scheme photocatalytic mechanism was proposed, and the dye decomposition was primarily caused by the presence of O₂ radicals.

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SILAR 辅助合成 Cu2O 修饰的 TiO2 纳米管阵列：高效光催化染料降解和氢气进化研究

染料废水和能源短缺是两大抑制因素，而光催化应用已被证明是在废水修复和 H2 生产等多个领域克服上述危机的有效策略。本文通过在 TiO2 纳米管阵列（TiO2 NTs）上沉积 Cu2O 的方法制备了 TiO2 NTs/Cu2O 光催化剂，其中连续离子层吸附和反应（SILAR）沉积循环的次数在决定光电化学性能方面起着重要作用。TiO2 NTs/Cu2O (9) 在可见光光电流、污染物去除和 H2 演化方面表现突出。TiO2 NTs/Cu2O (9) 成功地去除了 MO、RhB、MB 和 Cr(VI)，降解效率分别为 99.32 %、69.63 %、99.27 % 和 72.55 %，并显示出最佳的 H2 进化速率（49.67 μmol-cm-2-h-1）。此外，还提出了 Z 型光催化机理，染料分解主要是由 O2 自由基的存在引起的。

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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