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author:

Jing, F. (Jing, F..) [1] | Liang, R. (Liang, R..) [2] | Xiong, J. (Xiong, J..) [3] | Chen, R. (Chen, R..) [4] | Zhang, S. (Zhang, S..) [5] | Li, Y. (Li, Y..) [6] | Wu, L. (Wu, L..) [7]

Indexed by:

Scopus

Abstract:

A highly effective Iron Metal-Framework photocatalyst (MIL-68(Fe)) has been successfully prepared via a facile solvothermal method under acidic condition. The UV–vis diffuse reflectance spectrum reveals that the absorption edge of MIL-68(Fe) is 440 nm. The flat-band potential of MIL-68(Fe) is −0.6 V vs. NHE at pH = 6.8, which is more negative than the redox potential of Cr(VI)/Cr(III) (+0.51 V, pH = 6.8). Consequently, it is thermodynamically permissible for the transformation of photogenerated electrons to the Cr(VI) to produce Cr(III). Moreover, MIL-68(Fe) could perform as an efficient photocatalyst towards the reduction of Cr(VI) aqueous with a wide pH range. After 5 min of visible light illumination (λ > 420 nm), almost 100% Cr(VI) can convert to Cr(III) with (NH4)2C2O4as a scavenger (pH = 3), which is also higher than that of N-doped TiO2(50%) and ZnO (7.6%) under identical conditions. Furthermore, MIL-68(Fe) is proved to perform as a highly efficient photocatalyst for remove of different aqueous contaminant with malachite green (MG) as a scavenger. Finally, a possible reaction mechanism has also been investigated in detail. © 2017 Elsevier B.V.

Keyword:

Cr(VI); MIL-68(Fe); Photocatalysis; Visible light

Community:

  • [ 1 ] [Jing, F.]State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou, 350002, China
  • [ 2 ] [Liang, R.]State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou, 350002, China
  • [ 3 ] [Xiong, J.]State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou, 350002, China
  • [ 4 ] [Chen, R.]State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou, 350002, China
  • [ 5 ] [Zhang, S.]Hunan Province Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha, 410022, China
  • [ 6 ] [Li, Y.]Hunan Province Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha, 410022, China
  • [ 7 ] [Wu, L.]State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou, 350002, China

Reprint 's Address:

  • [Wu, L.]State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou UniversityChina

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Source :

Applied Catalysis B: Environmental

ISSN: 0926-3373

Year: 2017

Volume: 206

Page: 9-15

1 1 . 6 9 8

JCR@2017

2 0 . 3 0 0

JCR@2023

ESI HC Threshold:226

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 155

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 5

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