摘要
SrTiO_(3)因合适的能带结构和稳定的物化特性,在光电化学阴极保护领域有很大的应用潜力,但是对太阳光的利用率低和光生电子-空穴对复合率高等问题限制了其进一步发展。基于此,利用阴离子(F)掺杂对SrTiO_(3)改性,以得到高效、稳定光电转换性能的SrTiO_(3)光阳极材料。通过溶剂热法制备了不同F掺杂浓度的SrTiO_(3)光阳极材料,UV-Vis DRS和PL测试结果表明,F掺杂提高了SrTiO_(3)对太阳光的利用率和光生电子-空穴对的分离能力。光电化学阴极保护测试结果表明:光照条件下,当F掺杂量为2.0%(原子数分数)时,F-2.0%-SrTiO_(3)与304不锈钢偶联后其光电流密度达到3.7μA/cm^(2),使304不锈钢的开路电位负移至-0.42 V,在模拟海水中为304不锈钢提供有效保护。
SrTiO_(3) has great potential for applications in the photoelectrochemical cathodic protection field due to its suitable band structure and stable recombination characteristics,but the low utilization of sunlight and high recombination rate of photogenerated electron-hole pairs limit its further development.Based on this,SrTiO_(3) was modification by doping anion(F)in order to obtain a new kind of SrTiO_(3) photoanode material with efficient and stable photoconversion performance.F-doped SrTiO_(3) photoanodes with different F doping concentrations were prepared by solvent thermal method.UV-Vis DRS and fluorescence spectrometer test results show that F doping improves utilization of sunlight and separation ability of photogenerated electron-hole pairs.The photoelectrochemical cathodic protection results are as follows:when F doping concentration is 2.0%(atomic fraction),the photocurrent density of F-2.0%-SrTiO_(3) coupled with 304 stainless steel reaches 3.7μA/cm^(2),and the open-circuit potential of 304 stainless steel negatively moves to-0.42 V under light conditions,showing an effective protection for 304 stainless steel in simulated seawater.
作者
王建省
孔存辉
曾雄丰
赵英娜
WANG Jiansheng;KONG Cunhui;ZENG Xiongfeng;ZHAO Yingna(Province Key Laboratory of Inorganic Nonmetallic Materials,College of Material Science and Engineering,North China University of Science and Technology,Tangshang 063210,China;Hebei(Tangshan)Ceramic Industry Technology Research Institute,Tangshang 063007,China)
出处
《人工晶体学报》
CAS
北大核心
2024年第4期707-713,共7页
Journal of Synthetic Crystals
基金
河北省自然科学基金钢铁联合基金(E2021209002)
唐山市科技局项目(22130215H,21130211D)。
