Evaluation of the Photocatalytic Properties of Copper Oxides/Graphene/TiO2 Nanoparticles Composites
Abstract
:1. Introduction
2. Results and Discussions
2.1. Morphological and Structural Characterization of the Composites
2.2. Optical Properties
2.3. Adsorption of Methylene Blue
2.4. Photodegradation Experiments
3. Materials and Methods
3.1. Preparation of Starting Cu(1,2,3%)-TiO2
3.2. Preparation of Cu-TiO2-Graphene Composites
3.3. Adsorption Isotherms/Photocatalytic Degradation of Methylene Blue (MB)
3.4. Instrumental Part
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Copper Content (x%) | Cu(x%)-TiO2 | Cu(x%)-TiO2-GO | Cu(x%)-TiO2-trGO200 | Cu(x%)-TiO2-trGO300 |
---|---|---|---|---|
1% | 2.9 eV | 2.75 eV | 2.58 eV | 2.5 eV |
2% | 2.94 eV | 2.56 eV | 2.34 eV | 2.16 eV |
3% | 2.86 eV | 2.76 eV | 2.66 eV | 2.56 eV |
Light Source—Initial MB Concentration | Composite | MB Photodegradation | Ref |
---|---|---|---|
UV source—America brand lamp model F17T8/BLB 17W; (λmax = 360 nm)—2.3 × 10−4 M | TiO2 | 59% | [27] |
TiO2/graphene | 87% | ||
Visible source—LED Philips 3PH5 with 14W-2.3 × 10−4 M | TiO2 | - | |
TiO2/graphene | 40% | ||
UV with λmax = 254 nm—1 × 10−5 M | TiO2/graphene (3wt%) | 90% | [28] |
UV–Vis light with high UV intensity—6 lamps with the power of 20W each, 110 W/m2 UV and 5 W/m2 Visible—10 mg/L | TiO2 | 29.42% (60 min) | [29] |
TiO2 500 | 55% (60 min) | ||
TiO2/rGO (1wt%) | 63% (60 min) | ||
TiO2/rGO (8wt%) | 91.5% (60 min) | ||
UV–Vis—light source consisting of 2.31 µW/cm2 (220–280 nm), 6.94 mW/cm2 (315–400 nm), 129.3 mW/cm2 (400–1050 nm)—10 mg/L | MB alone | 30% (50 min) | [30] |
TiO2 P25 | 100% (50 min) | ||
Graphene-P25 3% | 100% (80 min) | ||
Graphene-TiO2-5% | 100% (90 min) | ||
Visible light—84 mW/cm2 (400–1050 nm)—10 mg/L | Graphene-TiO2-3% | 95% (150 min) | |
Visible light—natural sunlight with a UV filter (11.45 a.m. to 17.45 p.m., 11.93oN; 79.13oE)—2 × 10−5 M | TiO2 | 40% (60 min) | [31] |
TiO2-graphene | 80% (60 min) | ||
UV light—6 lamps of 20W each (310–430 nm), 110 W/cm2—10 mg/L | TiO2 | 38.78% (90 min) | [32] |
TiO2-700 | 86.48% (90 min) | ||
TiO2/rGO-700 | 100% (90 min) | ||
Visible light—artificial solar light, halogen lamp, 60W—10 mg/L | TiO2 | 1.02% (300 min) | |
TiO2-700 | 7.11% (300 min) | ||
TiO2/rGO-700 | 32.13% (300 min) | ||
UV light—H2100CH—5 lamps (λmax = 254 nm)—20 mg/L | TiO2/ZnO/rGO | 99.6% (120 min) | [33] |
Visible light—simulated solar light, Xenon lamp, 300W—20 mg/L | TiO2/ZnO/rGO | 80% (180 min) | |
Visible light—Xenon lamp, 500W—30 mg/L | TiO2-P25 | 2% (480 min) | [34] |
CuO/TiO2-GR | 80% (480 min) | ||
Visible light—a Xenon lamp | Cu2O/TiO2 | 93.63% (45 min) | [35] |
Visible light—150W lamp (OSRAM) with a 420 nm cutoff filter—5 mg/L | CuO-Cu2O/TiO2 | 90% (180 min) | [15] |
Solar light—1 × 10−5 M | CuO | 35% (60 min) | [16] |
CuO-rGO | 50% (60 min) | ||
Cu2O | 45% (60 min) | ||
Cu2O-rGO | 52% (60 min) | ||
UV source—300W light source mainly UVA (315–400 nm) with some UVB (280–315 nm)—10 mg/L | Cu-doped TiO2/RGO (5 wt%) | 64% | [19] |
Visible light—Xenon lamp 300 W with a 420 nm cutoff filter—5 mg/L | Cu2O/rGO | 100% | [7] |
Cu(3%)-TiO2 | Cu(3%)-TiO2-GO | Cu(3%)-TiO2-trGO200 | Cu(3%)-TiO2-trGO300 | Cu(1%)-TiO2-GO | Cu(2%)-TiO2-GO | |
---|---|---|---|---|---|---|
kapp×103 (min−1) | 10.10 | 11.40 | 5.85 | 10.10 | 4.91 | 6.15 |
t1/2 (min) | 68.6 | 60.8 | 118.4 | 68.6 | 141.1 | 112.7 |
R2 | 0.9826 | 0.9885 | 0.9942 | 0.9990 | 0.9916 | 0.9914 |
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Cosma, D.; Urda, A.; Radu, T.; Rosu, M.C.; Mihet, M.; Socaci, C. Evaluation of the Photocatalytic Properties of Copper Oxides/Graphene/TiO2 Nanoparticles Composites. Molecules 2022, 27, 5803. https://doi.org/10.3390/molecules27185803
Cosma D, Urda A, Radu T, Rosu MC, Mihet M, Socaci C. Evaluation of the Photocatalytic Properties of Copper Oxides/Graphene/TiO2 Nanoparticles Composites. Molecules. 2022; 27(18):5803. https://doi.org/10.3390/molecules27185803
Chicago/Turabian StyleCosma, Dragos, Alexandra Urda, Teodora Radu, Marcela C. Rosu, Maria Mihet, and Crina Socaci. 2022. "Evaluation of the Photocatalytic Properties of Copper Oxides/Graphene/TiO2 Nanoparticles Composites" Molecules 27, no. 18: 5803. https://doi.org/10.3390/molecules27185803