Acta Photonica Sinica, Volume. 51, Issue 4, 0416001(2022)
Facile Synthesis of ZnO/TiO2 Nanocomposite Photocatalysts and Study of Their Photocatalytic Performance
Figures & Tables(17)
Fig. 1. Photodegradation curves of MB and MO of pure ZnO，commercial TiO2 and ZnO/TiO2 nanocomposites under simulated light（The inset is the fitting of the pseudo-first-order kinetic function）
Fig. 2. XRD spectra of pure ZnO，commercial TiO2 and ZnO/TiO2 nanocomposites samples
Fig. 3. High-resolution TEM images and SAED images of sample ZT0.002 and ZT0.5
Fig. 8. Energy paramagnetic resonance spectra of the samples at room temperature
Fig. 11. Effect of different scavengers on the photocatalytic degradation of MB and MO over ZT0.002
Fig. 13. The efficiency curves of MB，MO degradation of ZT0.002 sample under simulated sunlight in different
Table 1. The weight percentages of elements Ti and Zn and mole percentages of Ti/（Ti+Zn）in the samples ZT0.002，ZT0.02，ZT0.1，ZT0.25，ZT0.5
View tableView in ArticleTable 1. The weight percentages of elements Ti and Zn and mole percentages of Ti/（Ti+Zn）in the samples ZT0.002，ZT0.02，ZT0.1，ZT0.25，ZT0.5
Samples Ti Zn Ti/（Ti+Zn） Weight percentage/wt% Weight percentage/wt% Mole percentage/（mol·mol-1） ZT0.002 0.13 66.92 0.26 ZT0.02 1.04 65.45 2.11 ZT0.1 5.20 59.23 10.63 ZT0.25 11.56 56.11 21.81 ZT0.5 11.84 31.21 33.94
Table 2. The performance parameters of pure ZnO，commercial TiO2 and ZnO/TiO2 nanocomposites degradation of MB and MO under simulated light
View tableView in ArticleTable 2. The performance parameters of pure ZnO，commercial TiO2 and ZnO/TiO2 nanocomposites degradation of MB and MO under simulated light
Sample Organic pollutant Linear fitting equation Apparent chemical reaction rate constant Linearly dependent coefficient R ZnO MB y=0.029 47x+0.009 1 0.029 47 0.993 97 MO y=0.037 38x-0.050 44 0.037 38 0.996 96 TiO2 MB y=0.153 02x+0.841 02 0.153 02 0.942 33 MO y=0.034 54x-0.139 14 0.034 54 0.991 49 ZT0.002 MB y=0.388 3x+0.085 03 0.038 83 0.999 21 MO y=0.047 73x-0.228 42 0.047 73 0.988 52 ZT0.02 MB y=0.034 93x+0.004 14 0.034 93 0.999 91 MO y=0.039 95x-0.146 5 0.039 95 0.987 56 ZT0.1 MB y=0.032 67x+0.008 91 0.032 67 0.999 71 MO y=0.026 98x-0.020 11 0.026 98 0.980 09 ZT0.25 MB y=0.043 78x-0.024 02 0.043 78 0.999 44 MO y=0.028 29x-0.048 49 0.028 29 0.994 72 ZT0.5 MB y=0.042 64x+0.259 68 0.042 64 0.998 96 MO y=0.041 41x-0.112 19 0.041 41 0.986 94
Table 3. Photodegradation of different semiconductor composite photocatalysts on organic pollutants
View tableView in ArticleTable 3. Photodegradation of different semiconductor composite photocatalysts on organic pollutants
Type of catalysts Organic pollutant Initial concentration Catalyst dose Light irradiated Irradiation time Removal efficiency References ZnO/TiO2 MB 4 mg/L 0.5 g/L Simulated sunlight 80 min 93% This work MO 90 min 90% ZnO/TiO2 MB 5 mg/L 1.5 g/L UV，λmax=365 nm 60 min 100% ［ 3 ］MO 20 mg/L 50 g/L 90 min 99% Cu2O/ZnO MO 10 mmol/L -- Visible light 5 h 90% ［ 7 ］ZnO/TiO2 MB 0.01 mmol/L -- Simulated sunlight 180 min 100% ［ 16 ］CuO/TiO2 MB 5 mg/L -- Simulated sunlight 60 min 40% ［ 17 ］NiO/TiO2 MO 10 mg/L 1.43 g/L UV，λmax=253.7 nm 1 h 87.3% ［ 18 ］Visible light 95.6% TiO2/Fe2O3 MB 0.01 mmol/L 1 g/L UV 5 h 95.2% ［ 26 ］Visible light 2 h 96% CdS/TiO2 MO 5 mg/L 2 g/L Simulated sunlight 120 min 95.3% ［ 27 ］ZnO/CdS MB 0.01 mmol/L 0.25 g/L Sunlight 120 min 100% ［ 28 ］
Table 4. The parameters of pure ZnO，commercial TiO2 and ZnO/TiO2 nanocomposites
View tableView in ArticleTable 4. The parameters of pure ZnO，commercial TiO2 and ZnO/TiO2 nanocomposites
Samples Average grain size/nm Average particle size/nm Specific surface area/（m2·g-1） ZnO 25 63.84 9.133 2 TiO2 37 116.78 9.767 2 ZT0.002 24 79.41 7.276 2 ZT0.02 25 60.39 -- ZT0.1 24 46.53 -- ZT0.25 26 36.36 9.470 2 ZT0.5 28 69.25 6.742 5
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Zemei PAN, Qiuping ZHANG, Man SONG, Huan YUAN, Yutong LIU, Yuanjie SU, Ming XU. Facile Synthesis of ZnO/TiO2 Nanocomposite Photocatalysts and Study of Their Photocatalytic Performance[J]. Acta Photonica Sinica, 2022, 51(4): 0416001
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Received: Nov. 30, 2021
Accepted: Jan. 18, 2022
Published Online: May. 18, 2022
The Author Email: ZHANG Qiuping (zhqpdq@163.com), XU Ming (hsuming_2001@aliyun.com)
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