尖端Pt负载纳米Au棒的制备及其催化还原4-硝基苯酚OACSTPCD
Preparation of Pt-loadedon Au nanorod and its catalytic reduction of 4-nitrophenol
采用种子生长法制备了长径比约为 4 的金纳米棒(AuNRs),并将铂负载其两端制备出尖端Pt负载的纳米Au棒(Pt-AuNRs).采用紫外-可见分光光度计、透射电子显微镜和 X 射线光电子能谱等一系列常规表征手段对AuNRs和Pt-AuNRs的物化性质进行表征及分析.研究AuNRs和Pt-AuNRs作为催化剂在NaBH4 存在下催化还原4-硝基苯酚(4-NP)的性能.首次提出Pt-AuNRs催化还原 4-NP机制.结果表明:500-Pt-AuNRs催化剂表现出最好的催化性能,速率常数Kapp = 0.3836 min-1,是AuNRs催化剂的 4.7 倍;Pt-AuNRs特殊的异质结构以及高表面活性和稳定性,有助于BH-4 在其表面的高效吸附和电子转移.
Gold nanorods(AuNRs)with aspect ratio of about 4 were prepared by the seed growth method,and Pt were load-ed on gold nanorods by KI etching method to prepare Pt-Au nanorods(Pt-AuNRs).A series of conventional characterizations like UV-Vis spectrophotometry,transmission electron microscopy,and X-ray photoelectron spectroscopy were used to identify the physicochemical properties of AuNRs and Pt-AuNRs.The catalytic reduction of 4-nitrophenol(4-NP)with AuNRs and Pt-AuNRs as catalysts in the presence of NaBH4 was studied.The mechanism of Pt-AuNRs catalytic reduction of 4-NP was proposed for the first time.The results show that 500-Pt-AuNRs catalyst presents the best catalytic performance,and the rate constant Kapp = 0.3836 min-1,which is 4.7 times that of AuNRs catalyst.The special heterostructure,high surface activity and stability of Pt-AuNRs contribute to the high adsorption and electron transfer of BH-4 on its surface.
付云芝;陈笑霖;姚帅琪
海南大学化学化工学院,海南海口 570228
化学
AuNRsPt-AuNRs4-硝基苯酚催化还原
AuNRsPt-AuNRs4-nitrophenolcatalytic reduction
《中国石油大学学报（自然科学版）》 2024 (001)
自掺杂微纳金属氧化物催化剂在热区鲜植物提取液中的形成机制及其光催化降解盐酸环丙沙星的研究
176-181 / 6
国家自然科学基金项目(22162009)
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