Electrodeposited graphene@TiO2 nanosheets for enhanced photocathodic protection

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY Electrochemistry Communications Pub Date : 2024-02-24 DOI:10.1016/j.elecom.2024.107682

Qian-Yu Wang, Teng Xu, Ji-Ming Hu

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Abstract

In this work, TiO₂ was firmly attached on freestanding graphene (Gr, rather than graphene oxide or reduced graphene oxide) nanosheets (Gr@e-TiO₂) by a novel electrodeposition method. The morphology, crystal structure, band gap characteristics, optical properties and photoelectric properties were systematically investigated. It is indicated that the absorption of visible light increased and the recombination of photogenerated electron-hole pairs decreased for the as-obtained Gr@e-TiO₂. Compared with pure TiO₂ as well as GO (graphene oxide)@h-TiO₂ prepared by conventional hydrothermal method, Gr@e-TiO₂ exhibited a more negative open circuit potential and higher photocurrent density for 304SS protection. The enhanced photocathodic protection performance of Gr@e-TiO₂ can be attributed to the large specific surface area and good charge transport efficiency of graphene.

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用于增强光阴极保护的电沉积石墨烯@二氧化钛纳米片

在这项研究中，通过一种新颖的电沉积方法，TiO2 被牢固地附着在独立的石墨烯（Gr，而不是氧化石墨烯或还原氧化石墨烯）纳米片（Gr@e-TiO2）上。研究人员对其形貌、晶体结构、带隙特性、光学特性和光电特性进行了系统研究。结果表明，获得的 Gr@e-TiO2 对可见光的吸收增加，光生电子-空穴对的重组减少。与纯 TiO2 以及用传统水热法制备的 GO（氧化石墨烯）@h-TiO2 相比，Gr@e-TiO2 在 304SS 保护中表现出更负的开路电位和更高的光电流密度。Gr@e-TiO2 的光阴极保护性能之所以得到增强，是因为石墨烯具有较大的比表面积和良好的电荷传输效率。

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来源期刊

Electrochemistry Communications 工程技术-电化学

CiteScore

8.50

自引率

3.70%

发文量

160

审稿时长

1.2 months

期刊介绍： Electrochemistry Communications is an open access journal providing fast dissemination of short communications, full communications and mini reviews covering the whole field of electrochemistry which merit urgent publication. Short communications are limited to a maximum of 20,000 characters (including spaces) while full communications and mini reviews are limited to 25,000 characters (including spaces). Supplementary information is permitted for full communications and mini reviews but not for short communications. We aim to be the fastest journal in electrochemistry for these types of papers.