Surfactant-Guided Synthesis of Mn₃O₄ Nanostructures for Photocatalytic, Photoelectrochemical Applications and Sustainable Water Reuse

IF 3.7 3区化学 Q2 CHEMISTRY, APPLIED

Topics in Catalysis Pub Date : 2025-10-18 DOI:10.1007/s11244-025-02222-9

Anagha Joby, Manoj Balachandran, V. Deepthi

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引用次数: 0

Abstract

Currently, the global community is confronting water contamination from several sources, which poses significant environmental challenges. The reutilisation of polluted water constitutes a feasible strategy for sustainable wastewater management. In the present study, Mn₃O₄ was synthesised via chemical precipitation using polyvinyl alcohol (PVA), cetyltrimethylammonium bromide (CTAB) and glycine as surfactants and without any surfactants. The synthesised Mn₃O₄ using Glycine(MNG) showed the best photocatalytic efficacy compared to other synthesised materials, about 93 ± 0.35% disintegration of Rhodamine B in 150 min when illuminated with visible light. The progress of photodegradation was in conformity with the pseudo-first-order kinetic model with a velocity of 0.017 min⁻¹. Photoelectrochemical investigations assessed charge transfer, stability, and light-harvesting behaviour of Mn₃O₄ catalysts, showing their improved performance beyond photocatalysis. Seed germination in the treated water, controlled and uncontrolled conditions, was compared to ensure the agricultural and environmental viability. Additionally, ~ 84.54% of total organic carbon removal was achieved. A conceivable degradation mechanism was suggested after the degraded intermediates were examined using high-performance liquid chromatography (HPLC) and the elution patterns and retention periods.

Graphical Abstract

查看原文本刊更多论文

表面活性剂引导下Mn₃O₄纳米结构的合成及其光催化、光电化学应用和水的可持续回用

目前，全球社会正面临着来自多个来源的水污染，这对环境构成了重大挑战。污水的再利用是可持续废水管理的一项可行战略。本研究以聚乙烯醇（PVA）、十六烷基三甲基溴化铵（CTAB）和甘氨酸为表面活性剂，不添加任何表面活性剂，采用化学沉淀法合成了Mn3O4。与其他合成材料相比，甘氨酸（MNG）合成的Mn3O4表现出最好的光催化效果，在可见光照射下，150 min内罗丹明B的分解率约为93±0.35%。降解过程符合准一级动力学模型，降解速度为0.017 min−1。光电化学研究评估了Mn3O4催化剂的电荷转移、稳定性和光收集行为，显示了它们在光催化之外的改进性能。比较了处理后的水，控制和不控制条件下的种子萌发，以确保农业和环境的生存能力。有机碳去除率达84.54%。利用高效液相色谱（HPLC）、洗脱方式和保留时间对降解中间体进行了检测，提出了一种可能的降解机制。图形抽象

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来源期刊

Topics in Catalysis 化学-物理化学

CiteScore

5.70

自引率

5.60%

发文量

197

审稿时长

2 months

期刊介绍： Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief. The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.