PMID- 36541424
OWN - NLM
STAT- MEDLINE
DCOM- 20230109
LR  - 20230222
IS  - 1759-9679 (Electronic)
IS  - 1759-9660 (Linking)
VI  - 15
IP  - 2
DP  - 2023 Jan 6
TI  - Ultrafast colorimetric detection of Cr(VI) using Fe(3)O(4)@polydopamine/Prussian 
      blue composites as a highly efficient peroxidase mimic.
PG  - 221-227
LID - 10.1039/d2ay01849g [doi]
AB  - A recyclable peroxidase mimic Fe(3)O(4)@polydopamine/Prussian blue 
      (Fe(3)O(4)@PDA/PB) composite was facilely prepared by coating PDA on an Fe(3)O(4) 
      nanoparticle core and in situ growth of PB nanoparticles on a PDA shell. The 
      prepared Fe(3)O(4)@PDA/PB composite exhibited excellent peroxidase-like activity 
      and can catalytically oxidize the colorless colorimetric substrate 
      3,3',5,5'-tetramethylbenzidine (TMB) into a blue colored product in the presence 
      of H(2)O(2) at 30  degrees C in 1 min. The catalytic mechanism was deduced to be the 
      nanozyme-promoted generation of a hydroxyl radical (.OH), and the catalytic 
      behavior followed the typical Michaelis-Menten kinetics. Based on Cr(VI)-boosted 
      peroxidase-like activity of Fe(3)O(4)@PDA/PB, a simple and fast colorimetric 
      method for detection of Cr(VI) was developed. Under the optimum conditions, the 
      colorimetric method exhibited wider linear range (100 nM to 140 muM), low LOD 
      (51.1 nM), good selectivity and short detection time (1 min). Moreover, the 
      feasibility of the proposed colorimetric method was evaluated by determination of 
      Cr(VI) in spiked tap water and lake water samples. Good recoveries (95.2-102.9%) 
      and low relative standard deviations (RSDs) (1.6-4.4%) were obtained, showing 
      great promise for practical use.
FAU - Xu, Xianyuan
AU  - Xu X
AD  - School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, 
      Wuhan, 430205, PR China. leizhen930@wit.edu.cn.
FAU - Guo, Jingfang
AU  - Guo J
AD  - School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, 
      Wuhan, 430205, PR China. leizhen930@wit.edu.cn.
FAU - Lei, Zhen
AU  - Lei Z
AUID- ORCID: 0000-0003-3197-3609
AD  - School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, 
      Wuhan, 430205, PR China. leizhen930@wit.edu.cn.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20230106
PL  - England
TA  - Anal Methods
JT  - Analytical methods : advancing methods and applications
JID - 101519733
RN  - EC 1.11.1.7 (Peroxidase)
RN  - 18540-29-9 (chromium hexavalent ion)
RN  - 0 (polydopamine)
RN  - TLE294X33A (ferric ferrocyanide)
RN  - BBX060AN9V (Hydrogen Peroxide)
RN  - EC 1.11.1.- (Peroxidases)
SB  - IM
MH  - *Peroxidase
MH  - *Colorimetry/methods
MH  - Hydrogen Peroxide
MH  - Peroxidases
EDAT- 2022/12/22 06:00
MHDA- 2023/01/10 06:00
CRDT- 2022/12/21 06:53
PHST- 2022/12/22 06:00 [pubmed]
PHST- 2023/01/10 06:00 [medline]
PHST- 2022/12/21 06:53 [entrez]
AID - 10.1039/d2ay01849g [doi]
PST - epublish
SO  - Anal Methods. 2023 Jan 6;15(2):221-227. doi: 10.1039/d2ay01849g.