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Ca_(2)Mn_(3)O_(8)纳米微球的合成及催化分解过氧化氢性能的研究
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作者 周飞跃 徐哲峰 +5 位作者 程佩琪 谢锋 陈宏 郭成文 王栓娣 刘敏 《廊坊师范学院学报(自然科学版)》 2022年第2期45-49,共5页
类芬顿反应是指除Fe(Ⅱ)以外的催化剂对H_(2)O_(2)起到催化作用的一类反应,类芬顿催化体系的固体催化剂具有易于分离和回收、工作pH范围宽、效率高等优点,使其在废水处理中具有广阔的应用前景。Mn基氧化物(Mn_(2)O_(2))具有良好的催化活... 类芬顿反应是指除Fe(Ⅱ)以外的催化剂对H_(2)O_(2)起到催化作用的一类反应,类芬顿催化体系的固体催化剂具有易于分离和回收、工作pH范围宽、效率高等优点,使其在废水处理中具有广阔的应用前景。Mn基氧化物(Mn_(2)O_(2))具有良好的催化活性,但是其容易发生相变从而导致催化剂严重失活,可通过构建多元金属氧化物来稳定催化剂的相结构和催化活性。采用共沉淀法合成了双金属单斜相锰酸钙氧化物(Ca_(2)Mn_(3)O_(8))纳米微球。结果表明,Ca_(2)Mn_(3)O_(8)具有优异的催化分解H_(2)O_(2)性能,在15分钟内对H_(2)O_(2)(100 mL,1000 ppm)的降解率达100%,5次循环后,Ca_(2)Mn_(3)O_(8)纳米微球仍然具有良好的可重复性和高稳定性。Ca的引入极大地改善了Ca_(2)Mn_(3)O_(8)的结构稳定性,Ca、Mn双位点协同作用共同提升了催化分解H_(2)O_(2)的性能。 展开更多
关键词 过氧化氢 类芬顿反应 双金属氧化物 单斜锰酸钙 双位点
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Graphitic carbon nitride based single-atom photocatalysts 被引量:3
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作者 Junwei Fu Shuandi Wang +7 位作者 Zihua Wang Kang Liu Huangjingwei Li Hui Liu Junhua Hu Xiaowen Xu Hongmei Li Min Liu 《Frontiers of physics》 SCIE CSCD 2020年第3期13-26,M0001,共15页
Single-atom photocatalysts,due to their high catalysis activity,selectivity and stability,become a hotspot in the field of photocatalysis.Graphitic carbon nitride(g-C3N4)is known as both a good support for single atom... Single-atom photocatalysts,due to their high catalysis activity,selectivity and stability,become a hotspot in the field of photocatalysis.Graphitic carbon nitride(g-C3N4)is known as both a good support for single atoms and a star photocatalyst.Developing g-C3N4-based single-atom photocatalysts exhibits great potential in improving the photocatalytic performance.In this review,we summarize the recent progress in g-C3N4-based single-atom photocatalysts,mainly including preparation strategies,characterizations,and their photocatalytic applications.The significant roles of single atoms and catalysis mechanism in g-C3N4-based single-atom photocatalysts are analyzed.At last,the challenges and perspectives for exploring high-efficient g-C3N4-based single-atom photocatalysts are presented. 展开更多
关键词 graphitic carbon nitride single atoms atomically dispersed sites site-isolated catalysts PHOTOCATALYSIS
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