Preparation Of MoS₂ Electrochemical Electrode And Investigation On Glucose Detection Characteristics

MoS₂ micro-nano structures have many excellent properties, such as various morphologies, high catalytic activity, strong adsorption capacity and high sensitive to small changes on the surface, so it has a wide application in photocatalysis and biological detection fields. Glucose detection is very important in medical testing, food processing and bio-analysis, so we used MoS₂ as electrochemical electrode to detect the different concentrations of glucose. The flower-like structure of MoS₂ has larger specific surface area than the flake, spherical and other structures, it is also more conducive to rapid and effective detection of glucose. In addition, the better electronic conductivity and electro-catalytic activity of precious metal Au nanomaterials make the MoS₂ micron flower material modified by Au can effectively improve the performance of glucose sensor. This paper focuses on the following research around the following content:（1） MoS₂ micro-flowers were prepared by hydrothermal method, and influence to the product by pH values of precursor solution has been discuessed. The results indicate that MoS₂ crystals have better crystalline quality when the pH = 8. The particle size was about 3.6 μm, specific surface area was 9.646 m2/g with slit pore structure. Then, MoS₂ micron flower materials modified by Au which was synthesize by chemical method had better crystalline quality.（2） The electrochemical electrode prepared by MoS₂ micro-flowers had better electrochemical performance. The linear range was 0²0 mM which used to build non-enzymatic glucose sensor, the correlation coefficient（R） was 0.9653, the sensitivity was 262 μA/mM（103.6 μA?mM-1?cm-2）.（3） The electrochemical electrode prepared by Au modified MoS₂ had higher response current and electro-catalytic activity than the MoS₂ electrode. The linear range of the sensor was 0¹5 mM, the correlation coefficient（R） was 0.9708 and the sensitivity was 932 μA/mM（368.4 μA?mM-1 ? cm-2）, which improved the detection performance of non-enzymatic glucose sensor.