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题名: Facet-selective response of trigger molecule to CeO2 {110} for up-regulating oxidase-like activity
作者: Huang, Lunjie1; Zhang, Wentao1; Chen, Kai1; Zhu, Wenxin1; Liu, Xinnan1; Wang, Rong1; Zhang, Xu1; Hu, Na2; Suo, Yourui2; Wang, Jianlong1
刊名: CHEMICAL ENGINEERING JOURNAL
出版日期: 2017-12-15
卷号: 330, 页码:746-752
关键词: Biocatalysis ; Colorimetric biosensor ; Facet dependence ; Modulating strategy ; Nanoceria ; Oxidase mimics
DOI: 10.1016/j.cej.2017.08.026
文章类型: Article
英文摘要: Nanozymes, as a robust alternative to natural enzyme, usually suffer from unsatisfactory catalytic efficiency and limited modulating flexibility. Herein, we proposed a novel strategy to conquer these disadvantages relying on the facet-selective response of external trigger molecule which boosts the oxidase-like catalysis of nanoceria. Results indicate that the trigger molecule (i.e., sulfate ion) prefers to bind to the rod-like nanoceria (on its unique {1 1 0} facets) rather than nanopolyhedra or nanocubes. Sulfate ion-treated CeO2 nanorods (SO42- /CeO2 NRs) became modulatable oxidase mimetics of high efficiency, and the catalytic efficiency (k(cat)/K-m) of SO42- /CeO2 NRs improved by nearly 20-fold (versus that of the naked CeO2 NRs) for 3,3 ',5,5 '-tetramethylbenzidine (TMB) oxidation. This modulating strategy, together with the mechanism behind, is finally applied to develop colorimetric biosensors, which paves the way for embedding the system in biological and environmental networks.
WOS标题词: Science & Technology ; Technology
类目[WOS]: Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]: Engineering
关键词[WOS]: PEROXIDASE-LIKE ACTIVITY ; STRUCTURE DEPENDENCE ; CERIA NANOPARTICLES ; ARTIFICIAL ENZYMES ; CATALYTIC-ACTIVITY ; MIMETIC ACTIVITY ; NANOSCALE CERIA ; NANOCERIA ; NANOCRYSTALS ; NANOZYMES
收录类别: SCI
项目资助者: National Natural Science Foundation of China(21675127) ; Fundamental Research Funds for the Northwest A&F University of China(2014YB093 ; 2452015257)
语种: 英语
WOS记录号: WOS:000414083300071
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内容类型: 期刊论文
URI标识: http://210.75.249.4/handle/363003/10368
Appears in Collections:中国科学院西北高原生物研究所_期刊论文

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作者单位: 1.Northwest A&F Univ, Coll Food Sci & Engn, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci, Northwest Inst Plateau Biol, Qinghai Key Lab Qinghai Tibet Plateau Biol Resour, Xining 810008, Qinghai, Peoples R China
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