Optimize the catalytic properties by regulating the structure of Au@AgPt triangular nanoprisms and the application in colorimetric detection of ascorbic acid

The catalytic performance of the hollow-structured triangular nanoprisms is stronger than that of the deposited-structure. • A simple colorimetric method is established for the detection of ascorbic acid with low detection limit and high selectivity. • The detection limit is 2.93 μM for the Pt-Ag-Au triangular nanoprisms with hollow structure. • The Pt-Ag-Au triangular nanoprisms with hollow structure has a wide detection range of 100–1000 μM. Compared with monometallic nanomaterials, multimetallic nanomaterials are composed of multiple metals and exhibit many special optical properties. In recent years, novel platinum-based multimetallic nanostructures have attracted attention due to their excellent catalytic performance, and have potential applications in the fields of biosensing, medical imaging and catalysis. However, how the morphology and structure of nanoparticles affect their catalytic properties remains a new and intriguing question. This paper investigates the catalytic properties of Au@AgPt triangular nanoprisms by reducing 4-nitrophenol (4-NP) in the presence of sodium borohydride (NaBH 4 ). It was found that the prepared Au@AgPt triangular nanoprisms had good catalytic performance. What's more, the catalytic performance of the hollow-structured Au@AgPt triangular nanoprisms was stronger than that of the deposited Au@AgPt triangular nanoprisms. A simple colorimetric method for detecting ascorbic acid (AA) was established using the catalytic properties of Au@AgPt triangular nanoprisms. The detection limit of AA was 2.93 μM for the hollow-structured Au@AgPt triangular nanoprisms, with a very wide detection range of 100–1000 μM. This detection method achieved a low detection limit for AA and a high selectivity against interfering substances, which has broad application prospects in the fields of food safety testing and monitoring of metabolic levels and health conditions. The prepared Au@AgPt triangular nanoprisms had good catalytic performance. A simple colorimetric method for detecting AA was established using the catalytic properties of Au@AgPt triangular nanoprisms. This detection method achieved a low detection limit and a high selectivity, which has broad application prospects in the fields of food safety testing and monitoring of metabolic levels and health conditions. Download: Download high-res image (110KB) Download: Download full-size image