SERS光谱研究酸化的LaNiO_(3)/Au的催化性质

Probing Catalytic Properties of Acidified LaNiO_(3)/Au by SERS Spectroscopy

纳米酶因其制备简单、环境稳定性高等显着优势而受到广泛关注[1-3]。最近,SERS技术在研究各种基于纳米酶的催化系统中显示出有前景的应用[4-5],然而,由于一些纳米酶材料的SERS活性较弱,因此有必要引入贵金属SERS活性材料。采用静电纺丝法制备了LaNiO_(3)/Au的SERS基底,然后将其泡在pH=4的醋酸缓冲溶液一段时间得到酸化的LaNiO_(3)/Au。根据oxTMB在1611 cm^(-1)处监测SERS信号,来探究纳米酶的催化活性。发现酸化的LaNiO_(3)/Au较LaNiO_(3)/Au本体对TMB表现出优异的氧化酶活性,而且具有更好的SERS增强效果。

Nanozymes have attracted extensive attention due to their remarkable advantages of simple preparation and high environmental stability[1-3].Recently,SERS technology has shown promising applications in the study of various nanozyme-based catalytic systems[4-5],however,due to the weak SERS activity of some nanozyme materials,it is necessary to introduce noble metal SERS active materials.In this study,LaNiO_(3)/Au SERS substrates were prepared by electrospinning,and then soaked in acetic acid buffer solution of pH=4for a period of time to obtain acidified LaNiO_(3)/Au.The catalytic activity of the nanozyme was investigated by monitoring the SERS signal at 1611cm^(-1)with oxTMB.It was found that the acidified LaNiO_(3)/Au exhibited superior oxidase activity on TMB and better SERS enhancement effect than the LaNiO_(3)/Au bulk.