CoPi/Co(OH)₂修饰的Ta₃N₅作为304不锈钢光电化学阴极保护的新型光催化剂。

CoPi/Co(OH)₂ Modified Ta₃N₅ as New Photocatalyst for Photoelectrochemical Cathodic Protection of 304 Stainless Steel.

作者信息

Xie Xuan, Liu Li, Oguzie Emeka E, Li Ying, Wang Fuhui

机构信息

Shenyang National Laboratory for Materials Science, Northeastern University, NO. 3-11, Wenhua Road, Heping District, Shenyang 110819, Liaoning, China.

Institute of Metal Research, Chinese Academy of Sciences, 62# Wencui Road, Shenyang 110016, Liaoning, China.

出版信息

Materials (Basel). 2019 Jan 3;12(1):134. doi: 10.3390/ma12010134.

DOI:10.3390/ma12010134

PMID:30609819

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6337351/

Abstract

In this work, CoPi and Co(OH)₂ nanoparticles were deposited on the surface of Ta₃N₅ nanorod-arrays to yield a novel broad-spectrum response photocatalytic material for 304 stainless steel photocatalytic cathodic protection. The Ta₃N₅ nanorod-arrays were prepared by vapor-phase hydrothermal (VPH) and nitriding processes and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-Vis spectroscopy, respectively, to obtain morphologies, crystal structures, surface compositions, and light response range. In order to analyze the performance improvement mechanism of CoPi/Co(OH)₂ on Ta₃N₅ nanorod-arrays, the electrochemical behavior of modified and unmodified Ta₃N₅ was obtained by measuring the open circuit potential and photocurrent in 3.5 wt% NaCl solution. The results revealed that the modified Ta₃N₅ material better protects 304 stainless steel at protection potentials reaching -0.45 V.

摘要

在本工作中，将CoPi和Co(OH)₂纳米颗粒沉积在Ta₃N₅纳米棒阵列表面，以制备一种用于304不锈钢光催化阴极保护的新型广谱响应光催化材料。Ta₃N₅纳米棒阵列通过气相水热（VPH）和氮化工艺制备，并分别通过扫描电子显微镜（SEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）和紫外可见光谱进行表征，以获得形貌、晶体结构、表面组成和光响应范围。为了分析CoPi/Co(OH)₂对Ta₃N₅纳米棒阵列的性能改善机制，通过测量3.5 wt% NaCl溶液中的开路电位和光电流，获得了改性和未改性Ta₃N₅的电化学行为。结果表明，改性后的Ta₃N₅材料在保护电位达到-0.45 V时能更好地保护304不锈钢。