摘要
采用溶剂热法在氟掺杂的锡氧化物导电玻璃衬底上成功合成制备了长度为400~2000 nm,从基底(80 nm)到尖端(30 nm)锥状塔式WO_3纳米线薄膜,进而通过电化学沉积法在WO_3纳米线表面均匀沉积V_2O_5纳米颗粒,从而得到核壳结构WO_3/V_2O_5纳米线复合薄膜。运用X射线衍射、扫描电子显微镜等手段对复合薄膜进行表征,并运用循环伏安法、计时电流法和紫外可见光谱分析研究了该复合薄膜的电化学性能和光学性能。结果表明,与单一的V_2O_5薄膜相比,该复合薄膜的电致变色性能获得了显著增强。具有更好的循环稳定性、更大的透射率调制幅度(776 nm为67%)和更高的着色效率(776nm为13.5 cm2/C)。该法制备WO_3/V_2O_5核壳纳米结构电致变色综合性能优良,有望在隐身材料和智能变色薄膜材料等领域得到广泛应用。
The WO_3/V_2O_5 nano films were synthesized in two steps： first,the WO_3 nanowires were deposited on substrate of fluorine-doped tin oxide（ FTO） glass by solvothermal reaction; second,amorphous V_2O_5 nanoparticles were uniformly coated on the WO_3 nanowire surfaces by electrochemical deposition. The impact of the nano-structured WO_3/V_2O_5 coatings on the optical and electrochromic properties was investigated with X-ray diffraction,scanning electron microscopy,ultraviolet visible spectroscopy and cyclic voltammetry. The results showed that the coatings,comprising the ＂core-shell＂shaped WO_3/V_2O_5 nano-structured grains,displayexcellentelectrochromic properties,outperforming the V_2O_5 films because of better cycle stability,greater transmittance modulation（ 67% at 776 nm） and higher coloring efficiency（ 13. 5 cm2·C-1 at 776 nm）. We suggest that the newly-developed nano-structured WO_3/V_2O_5 coatings may be of much technological interest as the stealth or intelligent discoloration material.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2018年第2期87-93,共7页
Chinese Journal of Vacuum Science and Technology
基金
国家自然科学基金面上项目(No.51372063
51402078)
中央高校基础科研基金项目(No.JZ2015HGCH0150
No.JZ2016HGTB0719)
合肥工业大学学术新人提升计划(B)(JZ2016HGTB0711)项目资助
