新型固定化Z-scheme异质结430-SSF|NiFe2O4/NiO@Er3+:YAlO3光催化剂薄膜的设计和构建，用于同时析氢高效降解刚果红

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-04-28 DOI:10.1016/j.ijhydene.2025.04.273

Xindong Qin , Jiaqi Dang , Xican Li , Xue An , Taiyu Jin , Dawei Fang , Jun Wang

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引用次数: 0

摘要

由于具有优异的光生电子-空穴对分离效率，z型结构是提高光催化活性的有效结构。本文采用溶胶-凝胶自旋镀膜的方法将Z-scheme异质结NiFe2O4/NiO@Er3+:YAlO3光催化剂复合膜固定在430-不锈钢箔上，解决了粉末光催化剂难以回收再利用的问题，实现了CO2和H2的分离。考察了固定化z型光催化体系的作用。并提出了Er3+:YAlO3在652.2 nm波长光激发下的上转换发光机理。此外，还研究了模拟太阳光照射时间和刚果红浓度对样品活性的影响。在模拟日光照射180 min的条件下，刚果红的降解率为95.78%，产氢量达到381.87 μmol/dm2。并对样品的回收效率和稳定性进行了评价。在第五次循环试验中，刚果红的降解率为85.83%。提出了固定化Z-scheme 430-SSF|NiFe2O4/NiO@Er3+:YAlO3光催化复合膜同步纯析氢降解刚刚红的可能机理。本研究为设计和合成具有高活性的固定化光催化剂，解决能源短缺和环境污染问题做出了贡献。

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Design and construction of a novel immobilized Z-scheme heterojunction 430-SSF|NiFe2O4/NiO@Er3+:YAlO3 photocatalyst thin film for efficient Congo red degradation with simultaneous hydrogen evolution

Z-scheme structure is an effective construction to improve the photocatalytic activity due to the excellent photo-generated electron-hole pairs separation efficiency. In this paper, the Z-scheme heterojunction NiFe₂O₄/NiO@Er³⁺:YAlO₃ photocatalyst composite film is immobilized on the 430-Stainless steel foil by using sol-gel spin coating method, which solves the problems that the powder photocatalyst is difficult to recover and reuse and realizes the separation of CO₂ and H₂. The contribution of immobilized Z-scheme photocatalytic system is investigated. And the up-conversion luminescence mechanism (under excitation of 652.2 nm wavelength light) of Er³⁺:YAlO₃ is also proposed. Additionally, the influences of simulated sunlight irradiation time and Congo Red concentration on the activity of the sample are studied. Under the condition of simulated sunlight irradiation for 180 min, the degradation ratio of Congo Red is 95.78 % and the hydrogen production amount reaches 381.87 μmol/dm². And the recycling efficiency and stability of the sample are also evaluated. At the fifth cycle experiment, the degradation ratio of Congo red is 85.83 %. A possible mechanism on Congo Red photocatalytic degradation with synchronous pure H₂ evolution caused by immobilized Z-scheme 430-SSF|NiFe₂O₄/NiO@Er³⁺:YAlO₃ photocatalyst composite film is raised. Possibly, this work could make a contribution to the design and synthesis of immobilized photocatalyst with high-activity for concurrently solving the issues of energy shortage and environmental pollution.

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.