SnO_(2)/ITO光电化学电极制备及性能研究EI北大核心CSCD

采用商品化氧化铟锡(ITO)导电玻璃、纳米SnO_(2)水胶体分散液,通过旋涂法制备了高性能SnO_(2)/ITO电极,考察了SnO_(2)旋涂浓度、旋涂量、Triton X-100浓度、煅烧温度对SnO_(2)/ITO电极性能的影响,并优化了缓冲体系、pH、浓度及偏压条件。结果表明,当SnO_(2)水胶体分散液浓度15%、Triton X-100浓度0.01%、煅烧温度450℃时,制备的SnO_(2)/ITO电极具有较高的热稳定性和光电化学性能;草酸-草酸钠缓冲体系有利于光电流的产生,当草酸浓度为30 mmol/L(pH 6.0)、偏压为0.5 V时,可以产生较高的稳态光电流信号,以Ru(bpy)_(2)(dppz)^(2+)为光电化学信号探针,检测限为10 nmol/L。考察了ITO电极的性能差异性,同一批次及不同批次之间的光电流信号一致性相对标准偏差(RSD)在3.9%~5.6%之间。

Study on SnO2/ITO photoelectrochemical electrode preparation and performance analysis

Photoelectrochemical technology has been widely used in the field of bio-sensing analysis due to the advantages of rapid response, high sensitivity and low background signal. In this paper, a high-performance SnO2 / indiumtin oxide (SnO2 / ITO) photochemical electrode was prepared by spin-coating method using commercial ITO glass and SnO2 colloidal dispersion. The influencing factors of SnO2 concentration and amount, as well as Triton X-100 concentration and calcination temperature on the performance of SnO2 / ITO electrode were investigated. Additionally, the conditions of different buffer solutions, pH, concentration and bias voltage for the photoelectrochemical current (PC) were optimized. The results showed that the SnO2 / ITO electrodes prepared at the concentration of 15% SnO2 dispersion, 0. 01% Triton X-100 and 450 of calcination temperature exhibited the highest thermal stability and photoelectrochemical performance. A high and stable PC in 30 mmol / L oxalic acid buffer (pH 6. 0) at bias voltage of 0. 5 V was achieved. Ru(bpy)2 (dppz)2 + was used as the probe of PC signal, and the detection limit was 10 nmol / L. In addition,the ITO electrodes performance was evaluated by measuring the PC signal,the results exhibited that the reproductivity between the same batch and different batches was satisfactory with relative standard deviations (RSDs) ranged from 3. 9% to 5. 6% . © 2022, Youke Publishing Co.,Ltd. All rights reserved.