In this paper, multi-wall carbon nanotubes and nano-titanium dioxide (MWCNTs-NTiO 2 ) modified electrode is easily prepared by one-step coating. The nano-TiO 2 collid is prepared by sol-gel method at room temperature to improve the dispersion and electrical conductivity of original MWCNTs on glass carbon electrode (GCE). The electrochemical behaviors of dihydroxybenzene isomers are investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) at MWCNTs-NTiO 2 /GCE. Hydroquinone (HQ), catechol (CC) and resorcinol (RC) all exhibit sensitive responses at original MWCNTs modified electrode. However, the peak currents of HQ, CC and RC present much enhanced signals at MWCNTs-NTiO 2 modified electrode, proving a good synergetic effect of NTiO 2 and MWCNTs. The individual and simultaneous determination of HQ, CC and RC at MWCNTsNTiO 2 /GCE are studied, and obtains good liner relations in a wide range. The limits of detection for HQ, CC and RC are 93 nmol L -1 , 210 nmol L -1 and 32 nmol L -1 (S/N = 3), respectively. This kind of sensor has been applied for simultaneous determination of HQ, CC and RC in artificial wastewater and obtained good results.

ZnO based thin films are commonly used as transparent conductive oxides (TCO). There is increasing attention paid to improving transparent conductive electrodes for applications in photovoltaic devices, displays and electronics. However, simple deposition technology with better properties than the present generation are required for new devices. In this study, ZnO based TCO films with different dopants were prepared by magnetron sputtering technique at room temperature. A relationship between the microstructure and optoelectronic properties of sputtered ZnO based films was studied. As a potential transparent anode electrode for thin film batteries, the electrochemical behavior were further investigated. The electrochemical test show that the highest capacity of 300 mAh/g was obtained, which is higher than that of traditional graphite anode. In comparison with the resistivity results, the conductivity shows a positive effect in enhancing the specific capacity. High conductivity will provide more chance for the reaction between Li and active materials. The cycling test shows that a reversible capacity of 150 mAh/g can be achieved even after 200 cycles. The research reveals that ZnO based films with low electrical resistance are in favour of their electrochemical performance.