Efficient Removal of Cr(VI) by TiO2 Based Micro-Nano Reactor via the Synergy of Adsorption and Photocatalysis
Abstract
:1. Introduction
2. Materials and Methods
2.1. Reagents and Materials
2.2. Synthesis of ZIF-8
2.3. Synthesis of ZIF-8@TiO2
2.4. Cr(VI) Removal Measurement
2.5. Photoelectrochemical Measurement
2.6. Characterization
3. Results
3.1. Microstructure, Composition, and Performance Characterization of ZxTy
3.2. Removal of Cr (VI)
3.3. Possible Mechanism of Photocatalytic Activity
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Photo-Catalyst | Cr(VI) Concentration | Lamp Source | Catalyst Dosage | Light Application Time | Removal Rate | Reference |
---|---|---|---|---|---|---|
Cu2O-Au-TiO2 | 10 mg/L | UV-vis light | 1 g/L | 60 min | 92% | [2] |
Cu2O-Au-TiO2 | 10 mg/L | visible light | 1 g/L | 180 min | 43% | [2] |
MoS2/TiO2 | 10 mg/L | visible light | 1 g/L | 480 min | 99.57% | [4] |
Mn-TiO2 (rGO) | 20 mg/L | sunlight | 1 g/L | 60 min | 99.02% | [11] |
CDs/MT | 10 mg/L | LED-light | 1 g/L | 30 min | 100% | [17] |
TiO2@ZIF-8 | 20 mg/L | UV-vis light | 0.5 g/L | 60 min | 99% | [33] |
MIL-53(Fe)/Bi12O17Cl2 | 10 mg/L | white light | 0.5 g/L | 90 min | 99.2% | [41] |
Z100T200 | 20 mg/L | UV–vis light | 0.34 g/L | 60 min | 97.1% | In this study |
Sample | SBET (m2/g) | Pore Volume (cm3/g) | Average Pore Diameter (nm) |
---|---|---|---|
ZT-0 min | 107.0 | 0.407 | 15.223 |
ZT-60 min | 68.0 | 0.252 | 1.482 |
ZT-90 min | 67.9 | 0.260 | 1.533 |
ZT-180 min | 36.7 | 0.128 | 1.402 |
Cr(III) | Cr(VI) | ||||
---|---|---|---|---|---|
Samples | Cr 2p1/2 (eV) | Cr 2p3/2 (eV) | Cr 2p1/2 (eV) | Cr 2p3/2 (eV) | Area Ratio of Cr(VI)/Cr(III) |
K2Cr2O7 | 588.6 | 579.4 | |||
Cr2O3 | 586.2 | 576.5 | |||
Z100T200-60 min | 584.1 | 576.0 | 586.2 | 577.8 | 1.73 |
Z100T200-65 min | 584.7 | 576.2 | 586.6 | 578.4 | 0.37 |
Z100T200-90 min | 585.5 | 576.4 | 587.2 | 578.4 | 0.36 |
Z100T200-180 min | 584.6 | 576.1 | 586.0 | 577.9 | 0.50 |
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Song, Y.; Lu, X.; Liu, Z.; Liu, W.; Gai, L.; Gao, X.; Ma, H. Efficient Removal of Cr(VI) by TiO2 Based Micro-Nano Reactor via the Synergy of Adsorption and Photocatalysis. Nanomaterials 2022, 12, 291. https://doi.org/10.3390/nano12020291
Song Y, Lu X, Liu Z, Liu W, Gai L, Gao X, Ma H. Efficient Removal of Cr(VI) by TiO2 Based Micro-Nano Reactor via the Synergy of Adsorption and Photocatalysis. Nanomaterials. 2022; 12(2):291. https://doi.org/10.3390/nano12020291
Chicago/Turabian StyleSong, Yu, Xi Lu, Zhibao Liu, Wenfei Liu, Ligang Gai, Xiang Gao, and Hongfang Ma. 2022. "Efficient Removal of Cr(VI) by TiO2 Based Micro-Nano Reactor via the Synergy of Adsorption and Photocatalysis" Nanomaterials 12, no. 2: 291. https://doi.org/10.3390/nano12020291