▎ 摘　　要

The accurate detection of hazardous 4-nitrophenol (4-NP) is deemed essential for the environment and human health. Exploring efficient and low-cost methods for its monitoring has become completely necessary in the current century. Herein, the high-level sensing behavior of a graphene oxide-TiO2 composite for the detection of hazardous 4-NP, using a simple electrochemical sensor technique, is reported. The hybrid electrocatalyst of graphene oxide-TiO2 composite material was prepared via an ultrasound assisted sonication method. The structural and physiochemical properties were determined in detail using PXRD, TEM, HR-TEM, Raman, FTIR, XPS, UV-DRS and BET isotherm studies. The graphene oxide-TiO2 composite shows superior electrocatalytic performance for the detection of 4-NP with high sensitivity (3.9831 mu A mu M-1 cm(-1)) coupled with a low limit of detection (LOD) and limit of quantification (LOQ), which were found to be 0.0039 mu M and 0.0131 mu M, respectively. This study offers an excellent platform for exploring graphene oxide-TiO2 composite materials with great potential for monitoring hazardous environmental pollutants.