title: Hierarchical {001}-faceted BiOBr microspheres as a novel biomimetic catalyst: dark catalysis towards colorimetric biosensing and pollutant degradation.
abstract: In recent years, considerable effort has been devoted to finding novel enzyme mimetics with improved catalytic activities. However, the insightful understanding of such catalytic process is still elusive. In this paper, we report for the first time a typical photoactive layer-structured BiOBr as a novel biomimetic catalyst possessing highly efficient intrinsic peroxidase-like activity. Moreover, we have experimentally achieved high dark peroxidase-like catalytic activity in BiOBr microspheres and provided some new insights into the light-enhanced peroxidase-like catalytic property. On the basis of a typical color reaction derived from catalytic oxidation of peroxidase substrates over BiOBr microspheres with H2O2, the simple and sensitive colorimetric assays for detection of H2O2, glucose and ascorbic acid were successfully established. More interestingly, the BiOBr microspheres showed strong ability towards activation of H2O2, displaying excellent dark catalytic activity for the degradation of organic dye. It is therefore believed that our findings in this study could open up the possibility of utilizing BiOBr as enzymatic mimics in biotechnology and environmental remediation.
authors.affiliation: Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Shida Road 1#, Nanchong 637002, P.R. China. ah_aihong@163.com 0826zjjh@163.com.
authors.forename: Lili
authors.initials: L
authors.lastname: Li
authors.forename: Lunhong
authors.initials: L
authors.lastname: Ai
authors.forename: Caihong
authors.initials: C
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Jiang
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis; D001391:Azo Compounds / Q000737:chemistry; D001672:Biocompatible Materials / Q000737:chemistry* / Q000378:metabolism; D015374:Biosensing Techniques; D001729:Bismuth / Q000737:chemistry*; D002384:Catalysis; D003124:Colorimetry; D004396:Coloring Agents / Q000737:chemistry; D005947:Glucose / Q000032:analysis; D006861:Hydrogen Peroxide / Q000032:analysis; D007700:Kinetics; D008027:Light; D008863:Microspheres; D010084:Oxidation-Reduction; D009195:Peroxidase / Q000737:chemistry / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D001672:Biocompatible Materials; D004396:Coloring Agents; D014874:Water Pollutants, Chemical; C100258:methyl orange; D006861:Hydrogen Peroxide; D009195:Peroxidase; D005947:Glucose; C542279:bismuth oxybromide; D001205:Ascorbic Acid; D001729:Bismuth