Colorimetric ascorbic acid sensing from a synergetic catalytic strategy based on 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphyrin functionalized CuS nanohexahedrons with the enhanced peroxidase-like activity

Yanlei He, Ning Li, Jiajia Lian, Zhongdong Yang, Zhenxue Liu, Qingyun Liu, Xianxi Zhang, Xiao Zhang