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Photocatalytic removal of microcystin-LR by advanced WO3-based nanoparticles under simulated solar light.

Zhao C, Li D, Liu Y, Feng C, Zhang Z, Sugiura N, Yang Y - ScientificWorldJournal (2015)

Bottom Line: In the present study, Pt/WO3 exhibited the best performance for the photocatalytic degradation of MC-LR.The presence of metal cations (Cu2+ and Fe3+) improved the photocatalytic degradation of MC-LR.This study suggests that Pt/WO3 photocatalytic oxidation under solar light is a promising option for the purification of water containing MC-LR.

View Article: PubMed Central - PubMed

Affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8572, Japan ; School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China.

ABSTRACT
A series of advanced WO3-based photocatalysts including CuO/WO3, Pd/WO3, and Pt/WO3 were synthesized for the photocatalytic removal of microcystin-LR (MC-LR) under simulated solar light. In the present study, Pt/WO3 exhibited the best performance for the photocatalytic degradation of MC-LR. The MC-LR degradation can be described by pseudo-first-order kinetic model. Chloride ion (Cl-) with proper concentration could enhance the MC-LR degradation. The presence of metal cations (Cu2+ and Fe3+) improved the photocatalytic degradation of MC-LR. This study suggests that Pt/WO3 photocatalytic oxidation under solar light is a promising option for the purification of water containing MC-LR.

No MeSH data available.


The effect of catalysts on the efficiency of photocatalytic degradation of MC-LR. (Experimental conditions: MC-LR concentration of 1 mg L−1, catalyst concentration of 100 mg L−1, and simulated solar light intensity of 0.4 mW cm−2.)
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fig3: The effect of catalysts on the efficiency of photocatalytic degradation of MC-LR. (Experimental conditions: MC-LR concentration of 1 mg L−1, catalyst concentration of 100 mg L−1, and simulated solar light intensity of 0.4 mW cm−2.)

Mentions: As shown in Figure 3, the concentration of MC-LR was virtually unchanged after 180 min solar light irradiation when there was no photocatalyst in the solution. This result indicated that MC-LR was stable under solar light irradiation. After 180 min photocatalysis, approximately 24.8% of MC-LR was removed from the aqueous solution in which only pure WO3 was added. The modified WO3-based photocatalysts (CuO/WO3 and Pd/WO3) achieved 31.4% and 42.9% MC-LR removal, respectively. The Pt/WO3 composite achieved a 100% degradation of MC-LR after 180 min solar light irradiation. The modified WO3-based photocatalysts are supported by many previous researches. Arai et al. reported that the photocatalytic activity of Pd/WO3 was 2 times higher than that of CuO/WO3 in the degradation of acetaldehyde, and the performance of Pt/WO3 was better than that of CuO/WO3 for decomposing formaldehyde [22, 23]. In this present study, Pt/WO3 exhibits the best photocatalytic performance for the degradation of MC-LR under solar light irradiation.


Photocatalytic removal of microcystin-LR by advanced WO3-based nanoparticles under simulated solar light.

Zhao C, Li D, Liu Y, Feng C, Zhang Z, Sugiura N, Yang Y - ScientificWorldJournal (2015)

The effect of catalysts on the efficiency of photocatalytic degradation of MC-LR. (Experimental conditions: MC-LR concentration of 1 mg L−1, catalyst concentration of 100 mg L−1, and simulated solar light intensity of 0.4 mW cm−2.)
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4390111&req=5

fig3: The effect of catalysts on the efficiency of photocatalytic degradation of MC-LR. (Experimental conditions: MC-LR concentration of 1 mg L−1, catalyst concentration of 100 mg L−1, and simulated solar light intensity of 0.4 mW cm−2.)
Mentions: As shown in Figure 3, the concentration of MC-LR was virtually unchanged after 180 min solar light irradiation when there was no photocatalyst in the solution. This result indicated that MC-LR was stable under solar light irradiation. After 180 min photocatalysis, approximately 24.8% of MC-LR was removed from the aqueous solution in which only pure WO3 was added. The modified WO3-based photocatalysts (CuO/WO3 and Pd/WO3) achieved 31.4% and 42.9% MC-LR removal, respectively. The Pt/WO3 composite achieved a 100% degradation of MC-LR after 180 min solar light irradiation. The modified WO3-based photocatalysts are supported by many previous researches. Arai et al. reported that the photocatalytic activity of Pd/WO3 was 2 times higher than that of CuO/WO3 in the degradation of acetaldehyde, and the performance of Pt/WO3 was better than that of CuO/WO3 for decomposing formaldehyde [22, 23]. In this present study, Pt/WO3 exhibits the best photocatalytic performance for the degradation of MC-LR under solar light irradiation.

Bottom Line: In the present study, Pt/WO3 exhibited the best performance for the photocatalytic degradation of MC-LR.The presence of metal cations (Cu2+ and Fe3+) improved the photocatalytic degradation of MC-LR.This study suggests that Pt/WO3 photocatalytic oxidation under solar light is a promising option for the purification of water containing MC-LR.

View Article: PubMed Central - PubMed

Affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8572, Japan ; School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China.

ABSTRACT
A series of advanced WO3-based photocatalysts including CuO/WO3, Pd/WO3, and Pt/WO3 were synthesized for the photocatalytic removal of microcystin-LR (MC-LR) under simulated solar light. In the present study, Pt/WO3 exhibited the best performance for the photocatalytic degradation of MC-LR. The MC-LR degradation can be described by pseudo-first-order kinetic model. Chloride ion (Cl-) with proper concentration could enhance the MC-LR degradation. The presence of metal cations (Cu2+ and Fe3+) improved the photocatalytic degradation of MC-LR. This study suggests that Pt/WO3 photocatalytic oxidation under solar light is a promising option for the purification of water containing MC-LR.

No MeSH data available.