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F和Co共掺杂羟基磷灰石增强α-Fe2O3光阳极光电催化水氧化的性能研究(英文) 被引量:2

Fluorine and cobalt co-doping hydroxyapatite decorated hematite toward enhanced photoelectrochemical water oxidation
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摘要 表面修饰产氧助催化剂是提高α-Fe2O3光电催化水氧化反应效率的重要手段.通过水热法在α-Fe2O3表面构筑F掺杂羟基磷灰石(F-HAP),并在此基础上通过离子交换法制备了F、Co共掺杂HAP表面修饰的α-Fe2O3光阳极(FCo-HAP/α-Fe2O3).采用X射线衍射、扫描电子显微镜、紫外可见吸收光谱、电化学阻抗谱等表征了FCo-HAP/α-Fe2O3结构、电化学性质和光电催化水氧化性能,并与F-HAP/α-Fe2O3和Co-HAP/α-Fe2O3等进行了对比.结果表明,F掺杂能降低α-Fe2O3表面HAP晶粒的尺寸,提高Co-HAP/α-Fe2O3的电化学活性面积,促进光生电荷向电解质转移,最终提高了α-Fe2O3表面的光电催化水氧化性能. Surface modification with oxygen evolution cocatalyst is an important method to improve the photoelectrochemical (PEC) performance of α-Fe2O3. In this work, F doping hydroxyapatite (HAP) was first constructed on the surface of α-Fe2O3, and then F and Co co-doping HAP decorated α-Fe2O3 (FCo-HAP/α-Fe2O3) was fabricated by using ion-exchange process. The crystalline structure, surface morphology,(photo)electrochemical performance of FCo-HAP/α-Fe2O3 were characterized by using X-ray diffraction, scanning electron microscopy and (photo)electrochemical test, and compared with F-HAP/α-Fe2O3 and Co-HAP/α-Fe2O3. Results indicated that the doping with F could reduce the size of HAP on α-Fe2O3 surface followed by enlarge the electrochemically active surface area, and promote the charge transfer from photoanode to electrolyte, thus significantly improve the PEC water oxidation of α-Fe2O3.
作者 杜羽庆 王珍珍 常志显 张凌 种瑞峰 DU Yuqing;WANG Zhenzhen;CHANG Zhixian;ZHANG Ling;CHONG Ruifeng(Institute of Upconversion Nano-scale Materials,College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,Henan,China)
出处 《化学研究》 CAS 2019年第4期331-337,共7页 Chemical Research
基金 National Natural Science Foundation of China(51502078) Major Project of Science and Technology,Education Department of Henan Province(19A150019 and 19A150018)
关键词 氧化铁 光电化学水氧化 羟基磷灰石 F和Co共掺杂 hematite photoelectrochemical water oxidation hydroxyapatite F and Co co-doping
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