Multicomponent nanostructured catalyst of rGO-Bi-V2O5 for photocatalytic degradation of methylene blue and supercapacitor applications

IF 5.7 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem Pub Date : 2025-11-01 Epub Date: 2025-10-24 DOI:10.1016/j.flatc.2025.100962

Sahil S. Magdum , Gowthami Palanisamy , Karuppaiah Selvakumar , Sadhasivam Thangarasu , Tae Hwan Oh

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Abstract

The advancement of multifunctional nanomaterials aimed at environmental remediation and energy storage presents a significant challenge in the field of sustainable modern technologies. This research work represents the synthesis of a novel and well interconnected ternary nanostructure of two-dimensional layered reduced graphene oxide (rGO) with bismuth (Bi) and nanorod-like vanadium oxide (V₂O₅) for methylene blue (MB) degradation and supercapacitor applications. The effective photocatalyst has been identified by preparing various arrays, adjusting the Bi content, and incorporating rGO with V₂O₅ system as Bi-V₂O₅ (BiV) and rGO-Bi-V₂O₅ (rGBiV) catalysts. The as-developed materials were successfully verified through various sophisticated structural and microstructural analyses. The morphological investigation demonstrated that rGO are in adherence with Bi and V₂O₅. The utilization of Bi and rGO with V₂O₅ resulted in decrease in the bandgap and enhanced charge separation. The rGBiV-1 composite demonstrated remarkable photocatalytic performance, attaining a 96.72 % degradation of MB within 90 min under visible-light irradiation. The •OH radical is shown to be essential in the photodegradation process. It is significant that •O₂⁻ radical also contributed to the improvement of photocatalytic activity. Electrochemical measurements demonstrated a notable improvement in capacitive behavior, with rGBiV-1 achieving a specific capacitance of 475 F g⁻¹. This enhancement is linked to the synergistic effects of high surface area, effective electron transport through rGO, and the presence of redox-active sites (V⁵⁺/V⁴⁺). The findings demonstrate the promise of rGO-Bi-V₂O₅ nanohybrids as versatile materials for combined wastewater treatment and electrochemical energy storage applications.

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rGO-Bi-V2O5多组分纳米结构催化剂在亚甲基蓝光催化降解及超级电容器中的应用

以环境修复和能源储存为目标的多功能纳米材料的发展是可持续现代技术领域的一个重大挑战。这项研究工作代表了一种新型的、互连良好的二维层状还原氧化石墨烯（rGO）与铋（Bi）和纳米棒状氧化钒（V2O5）的三元纳米结构的合成，用于亚甲基蓝（MB）的降解和超级电容器的应用。通过制备各种阵列、调整Bi含量、将rGO与V2O5体系结合作为Bi-V2O5 （BiV）和rGO-Bi-V2O5 （rGBiV）催化剂，确定了有效的光催化剂。通过各种复杂的结构和微观结构分析，成功地验证了所开发的材料。形态学研究表明，氧化石墨烯与Bi和V2O5具有粘附性。Bi和rGO与V2O5的使用减小了带隙，增强了电荷分离。rGBiV-1复合材料表现出优异的光催化性能，在可见光照射下，90 min内对MB的降解率达到96.72%。•OH自由基在光降解过程中是必不可少的。值得注意的是，•O2−自由基也有助于提高光催化活性。电化学测量表明，rGBiV-1的电容性能得到了显著改善，比电容达到475 F g−1。这种增强与高表面积、通过氧化石墨烯的有效电子传递和氧化还原活性位点（V5+/V4+）的存在的协同效应有关。研究结果表明，rGO-Bi-V2O5纳米杂化材料有望成为污水联合处理和电化学储能应用的通用材料。

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来源期刊

FlatChem Multiple-

CiteScore

8.40

自引率

6.50%

发文量

104

审稿时长

26 days

期刊介绍： FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)