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B位Mn/W共掺杂对Bi_(4)Ti_(3)O_(12)铋层状压电陶瓷的电学性能影响 被引量:1
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作者 梁志豪 黄荣厦 张艺 《陶瓷学报》 CAS 北大核心 2023年第4期719-726,共8页
采用直接反应烧结法制备Mn/W共掺杂的Bi_(4)Ti_(3-x)(Mn_(1/3)W_(2/3))_(x)O_(12)(BITMW-100x,0.01<x<0.07)铋层状高温压电陶瓷,研究Mn/W掺杂含量对BITMW-100x陶瓷的结构和电学性能的影响。XRD图谱结果显示,所有样品均表现出单一... 采用直接反应烧结法制备Mn/W共掺杂的Bi_(4)Ti_(3-x)(Mn_(1/3)W_(2/3))_(x)O_(12)(BITMW-100x,0.01<x<0.07)铋层状高温压电陶瓷,研究Mn/W掺杂含量对BITMW-100x陶瓷的结构和电学性能的影响。XRD图谱结果显示,所有样品均表现出单一相。随着Mn/W掺杂含量的增加,SEM图谱中观察到陶瓷晶粒的尺寸呈现先变大后变小的趋势。介温图谱中发现Mn/W的掺杂能有效抑制Bi_(4)Ti_(3)O_(12)陶瓷样品的介电损耗,同时居里温度也呈现小幅度下降。Mn/W在取代Ti离子后能减少Bi_(4)Ti_(3)O_(12)陶瓷的氧空位缺陷浓度,减少氧空位对电畴的钉扎效应,提升压电系数。当Mn/W掺杂含量x=0.05时,陶瓷样品具有最佳的综合性能:介电损耗(tanδ)为0.7%,居里温度为674℃,压电常数(d_(33))为18.1pC·N^(-1),同时压电常数具有良好的热稳定性。 展开更多
关键词 压电陶瓷 bi_(4)ti_(3)o_(12) b位掺杂 铁电 铋层状结构
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水热法合成Bi_(4)Ti_(3)O_(12)/BiOI复合光催化剂对罗丹明B催化活性研究 被引量:3
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作者 张丽红 蔡雅晴 《当代化工》 CAS 2022年第6期1392-1396,共5页
以Bi(NO)·5HO、KI、K_(2)TiO_(2)(CO_(4))_(2)为原料,通过水热法合成Bi_(4)Ti_(3)O_(12)/BiOI(简记为BTI)复合光催化剂,并对合成的复合催化剂进行X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、固体紫外可见漫反射(UV-vis DRS)表征测... 以Bi(NO)·5HO、KI、K_(2)TiO_(2)(CO_(4))_(2)为原料,通过水热法合成Bi_(4)Ti_(3)O_(12)/BiOI(简记为BTI)复合光催化剂,并对合成的复合催化剂进行X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、固体紫外可见漫反射(UV-vis DRS)表征测试,分析样品的晶体结构、元素组成及光性能等。同时,利用250 W的氙灯模拟可见光照射条件,将催化剂对罗丹明B进行降解实验分析。结果表明:较之单相催化剂Bi_(4)Ti_(3)O_(12)和BiOI,二者复合后形成的异质结对可见光的吸收效果均有显著提升,其中以BTI-2(Bi_(4)Ti_(3)O_(12)与BiOI的摩尔比2∶1)复合催化剂降解效果最佳,降解率可达95.7%。 展开更多
关键词 bi_(4)ti_(3)o_(12)bioI 光催化 罗丹明b
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Recent advances in bismuth-based multimetal oxide photocatalysts for hydrogen production from water splitting:Competitiveness,challenges,and future perspectives 被引量:2
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作者 Zheng Zhu Shipeng Wan +7 位作者 Yunxia Zhao Yaxin Gu Yaobin Wang Yong Qin Zhihui Zhang Xinlei Ge Qin Zhong Yunfei Bu 《Materials Reports(Energy)》 2021年第2期22-34,共13页
The efficient utilization of photocatalytic technology is essential for clean energy.Bismuth-based multimetal oxides(Bi_(2)WO_(6),Bi_(2)MoO_(6),BiVO_(4)and Bi_(4)Ti_(3)O_(12))have aroused widespread attention as a vis... The efficient utilization of photocatalytic technology is essential for clean energy.Bismuth-based multimetal oxides(Bi_(2)WO_(6),Bi_(2)MoO_(6),BiVO_(4)and Bi_(4)Ti_(3)O_(12))have aroused widespread attention as a visible light responsive photocatalyst for hydrogen evolution due to their low cost,nontoxicity,modifiable morphology,and outstanding optical and chemical properties.Nevertheless,the photocatalytic activities of pure materials are unsatisfactory because of their relative small specific surface area,poor quantum yield,and the rapid recombination of photogenerated carriers.Therefore,some modification strategies,including morphological control,semiconductor combination,doping,and defect engineering,have been systematically studied to enhance photocatalytic H_(2)evolution activity in the past few years.Herein,we summarize the recent research progress on bismuth-based photocatalysts,pointing out the prospects,opportunities and challenges of bismuth-based photocatalysts.Eventually,we aims to put forward valuable suggestions for designing of bismuth-based photocatalysts applied in hydrogen production on the premise of consolidating the existing theoretical basis of photocatalysis. 展开更多
关键词 bi_(2)Wo_(6) bi_(2)Moo_(6) biVo_(4) bi_(4)ti_(3)o_(12) Morphological control Semiconductor combination HETERoJUNCtioN doping Defect Hydrogen production
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