Al2O3纳米粒子修饰BiOBr纳米棒光催化剂的界面工程

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-04-17 DOI:10.1016/j.mseb.2025.118290

Amandeep Kaur , Sushil Kumar Kansal , K. Priyanga Kangeyan , Sandeep Kumar Lakhera , Jai Prakash , Junghyun Cho

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引用次数: 0

摘要

工业废水中的合成染料对环境、水生生态系统和人类健康构成重大威胁。罗丹明B （RhB）是一种广泛用于各种工业的染料，突出了它的经济重要性，但也是一种普遍的污染物。RhB已被证明对生物群落具有致癌和诱变作用，并引起许多其他生态问题。因此，开发一种实用且经济实惠的技术从工业废水中去除这种染料是至关重要的。技术的进步促进了光催化的发展，作为一种廉价和环境友好的方法，必须探索对RhB的降解。方法采用简单的方法合成Al2O3/BiOBr复合材料。利用各种结构和形态分析技术对合成的复合材料进行了系统的表征。然后对合成的Al2O3/BiOBr复合材料在阳光直射下作为光催化剂降解RhB的效果进行了评价。在最佳条件下，即pH为9，初始染料溶液浓度为0.010 g L−1，催化剂剂量为0.035 g L−1，在160 min内，该复合材料在阳光直射下的降解效率达到99.6%。它的可回收性也被证明了五个循环。研究结果表明，Al2O3/BiOBr复合材料是一种有前途的有效光催化剂，在阳光直射下表现出优异的性能。Al2O3/BiOBr复合材料的高性能归因于Al2O3与BiOBr之间的协同作用。分析表明，Al2O3/BiOBr复合材料增强了光吸收和电荷（电子-空穴）分离。活性自由基测试结果表明，●OH和●O2 -活性氧占主导地位。并推导了光催化降解的z型异质结机理。Al2O3/BiOBr复合材料是一种有效且可持续的光催化剂，可用于其他基于光催化的能源和环境应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Interface engineering of Al2O3 nanoparticle-decorated BiOBr nanorod photocatalysts

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Interface engineering of Al2O3 nanoparticle-decorated BiOBr nanorod photocatalysts

Background

Synthetic dyes in industrial wastewater pose significant threats to the environment, aquatic ecosystems, and human health. Rhodamine B (RhB) is one such dye that is extensively used in the varied industries, highlighting its economic importance but also its prevalence as a pollutant. RhB has proven carcinogenic and mutagenic effects on living communities and induces numerous other ecological problems. It is therefore crucial to develop a practical and affordable technique to remove this dye from industrial wastewater. Advancements in technology have facilitated the development of photocatalysis, as an inexpensive and environmentally friendly method that indeed must be explored for the degradation of RhB.

Methods

This study introduces the synthesis of Al₂O₃/BiOBr composite via a facile approach. The as-synthesized composite was systematically characterized by using various structural and morphological analytical techniques. The as synthesized Al₂O₃/BiOBr composite was then evaluated in terms of its efficacy as photocatalyst in degrading RhB under direct sunlight.

Significant findings

The composite achieves a peak degradation efficiency of 99.6 % under direct sunlight within 160 min at optimal conditions i.e. pH 9, initial dye solution concentration of 0.010 g L⁻¹, and a catalyst dose of 0.035 g L⁻¹. Its recyclability was also demonstrated for five cycles. The findings position the Al₂O₃/BiOBr composite as a promising and effective photocatalyst, showcasing superior performance under direct sunlight irradiation. The high performance of the Al₂O₃/BiOBr composite was attributed to the synergism between the Al₂O₃ and BiOBr. The analysis revealed that Al₂O₃/BiOBr composite enhanced light absorption, and charge (electrons–holes) separation. The reactive radical test revealed that the ^●OH, and ^●O₂^– reactive oxygen species were dominant. The Z-scheme heterojunction mechanism for photocatalytic degradation was also deduced. Al₂O₃/BiOBr composite is shown to be an effective and sustainable photocatalyst and may be used for other photocatalytic-based energy and environmental applications.

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.