CAJ | 학술논문

采用阳极氧化法在0.5 mol·L-1硫酸+1 mol·L-1马来酸的混合溶液中制得了束状TiO2薄膜.X射线衍射(XRD)分析表明样品的晶型结构主要为无定形态;所制得的样晶通过原子力显微镜(AFM)观察,束状结构TiO2的宽度约2-5μm,长度超过20μm,束状结构中包含的纳米棒直径约80-150 nm.将制得的束状TiO2膜电极在上述混合溶液中直接进行原位的循环伏安扫描和恒电流电解实验.研究结果表明,马来酸在该电极表面异相电催化还原生成丁二酸;在恒电流电解过程中采用电极原位活化可明显提高丁二酸的产率和电流效率,并指出改进电极的原位活化技术是未来研究工作的主要目标.
채용양겁양화법재0.5 mol·L-1류산+1 mol·L-1마래산적혼합용액중제득료속상TiO2박막.X사선연사(XRD)분석표명양품적정형결구주요위무정형태;소제득적양정통과원자력현미경(AFM)관찰,속상결구TiO2적관도약2-5μm,장도초과20μm,속상결구중포함적납미봉직경약80-150 nm.장제득적속상TiO2막전겁재상술혼합용액중직접진행원위적순배복안소묘화항전류전해실험.연구결과표명,마래산재해전겁표면이상전최화환원생성정이산;재항전류전해과정중채용전겁원위활화가명현제고정이산적산솔화전류효솔,병지출개진전겁적원위활화기술시미래연구공작적주요목표.
Anodic oxidation is a novel and simple method to fabricate TiO2 film with particular morphologies in a mixture of 0.5 mol·L-1 H2SO4+1 mol-1·L-1 maleic acid solution. The formation of a mixture containing low crystal retie phase and amorphous structure of TiO2 was confirmed by X-ray diffraction (XRD). Bundle structures of TiO2 film with the breadth of 2-5 μm and the length over 20 μm were observed by atomic force microscope (AFM). Simultaneously, we found that the average diameter of the fine stick within the bundle structures of TiO2 was 80-150 nm Electrocatalytic reduction of maleic acid to succinic acid was investigated by cyclic voltammetry and galvanostatic electrolysis experiments. The heterogeneous catalytic reduction of rnaleic acid could be confirmed with a comparison of the cyclic voltammetry recorded in the absence and the presence of maleic acid on the bunchy TiO2 film surface. In-situ activation of the as-anodized TiO2 electrode by galvanic cycle for galvanostatic electrolysis experiments brought the maximum yield of succinic acid and current efficiency.