Ag-Cu2O composite films with enhanced photocatalytic activities for methylene blue degradation: Analysis of the mechanism and the degradation pathways

Yu, Xiaojiao; Zhang, Jian; Chen, Yangyang; Ji, Qinggong; Wei, Yu‐Chen; Niu, Jinfen; Yu, Zhong; Yao, Binghua

doi:10.1016/j.jece.2021.106161

Cited by 95 publications

(23 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…I3 was continuously attacked by • OH to form I8 ( m / z = 202). Following this, it was oxidized to obtain I9 ( m / z = 158) . These intermediates were the products under 2 kGy conditions and were further oxidized and mineralized to form CO 2 , H 2 O, NO 3 – , SO 4 2– , and other low-molecular-weight organics under conditions of large irradiation doses.…”

Section: Results and Discussionmentioning

confidence: 99%

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD₃/Fe₆ Composite: Mechanistic Studies

Tao

et al. 2022

ACS Omega

View full text Add to dashboard Cite

Organic dyes are ubiquitous pollutants in various aquatic environments as they are produced in abundance and used widely. In the present work, the degradation and mineralization of various organic dyes such as methylene blue (MB), methyl orange (MO), and rhodamine B (RhB), following the electron beam irradiation method in the presence of a graphitic carbon nitride/carbon nanodots/Fe(II) (CN/CD 3 /Fe 6 ) composite, were studied. The removal efficiency of MB reached 81.7% under conditions of electron beam irradiation (EBI) when the total irradiation dose was 5 kGy. This increased to 91.2% in the presence of the CN/CD 3 /Fe 6 composite. The mineralization efficiency increased from 30.1 to 47.3% when the composite was added, and the total irradiation dose was 20 kGy. The removal efficiency of organic dyes was not significantly affected in the pH range of 3–11. Results from cyclic experiments conducted using MB degradation indicated that the CN/CD 3 /Fe 6 composite exhibited good stability and reusability even after five irradiation cycles. Results from scavenging experiments revealed that • OH was the predominant reactive species during the MB degradation process. Intermediates produced in the synergistic system (EBI&CN/CD 3 /Fe 6 system) consisting of the CN/CD 3 /Fe 6 composite and EBI were detected using the liquid chromatography-mass spectrometry (LC-MS) technique. Based on the results, the possible degradation mechanism and pathways for MB were proposed.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD₃/Fe₆ Composite: Mechanistic Studies

Tao

et al. 2022

ACS Omega

View full text Add to dashboard Cite

show abstract

“…13 It has been shown that the energy level of Cu 2 O is higher than the newly established equilibrium Fermi level of Ag–Cu 2 O, so the electrons accumulated on the CB of Cu 2 O are more easily transferred to the Ag particle surface. 59,60 The energy position of these electrons is significantly below the reduction potential of oxygen (−0.33 eV vs. NHE). These electrons transferred to the surfaces of the Ag particles can effectively react with oxygen to form superoxide radicals (˙O 2 − ), thereby degrading organic pollutants.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photoactive performance of three-layer structured Ag/Cu₂O/TiO₂ composites with tunable crystal microstructures

Liang

Sun

2023

CrystEngComm

View full text Add to dashboard Cite

show abstract

“…These are displayed in Scheme 1 and Scheme 2. [82][83][84][85] Scheme 1. Feasible pathways suggested for degradation of MB due to involvement of photocatalyst.…”

Section: Possible Mechanism and Degradation Pathwaymentioning

confidence: 99%

Synergistic Effect of Selenium Dioxide for Better Photocatalytic Performance of Conventional Semiconductors Distributed into Mesoporous SBA‐15

Ranjbar‐Niavol,

Zanjanchi,

Farjood

2023

ChemistrySelect

View full text Add to dashboard Cite

The mesoporous SBA‐15 was synthesized in acidic conditions by hydrothermal method using Pluronic surfactant P123. A combination of SeO2, TiO2, and CuO was loaded in SBA‐15 in pairs or singly. Synthesized SBA‐15 and some loaded mesoporous materials were characterized using several standard techniques. The efficiency of the synthesized photocatalysts was verified for the decomposition of two different dyes (methylene blue (MB) and methyl green (MG)) under ultraviolet and visible light radiation. The results show that the synthesized photocatalyst based on SBA‐15 with 5 % by weight of TiO2 and 5 % by weight of SeO2 has better performance (about 98 % of MB or MG were degraded within 120 min under UV radiation). Also, the photocatalyst with 5 % by weight of SeO2 and 5 % by weight of CuO shows a good performance for the degradation of the dyes under visible irradiation in the presence of H2O2 (complete elimination of MB and MG within 150 and 75 min, respectively). The scavenging test shows that superoxide has a governing role for the degradation of the dyes. The photocatalysts are reusable and they could preserve more than 74 % of the efficiency following 4 times of consecutive use for the degradation of the dyes.

show abstract

Ag-Cu2O composite films with enhanced photocatalytic activities for methylene blue degradation: Analysis of the mechanism and the degradation pathways

Cited by 95 publications

References 49 publications

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD₃/Fe₆ Composite: Mechanistic Studies

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD₃/Fe₆ Composite: Mechanistic Studies

Enhanced photoactive performance of three-layer structured Ag/Cu₂O/TiO₂ composites with tunable crystal microstructures

Synergistic Effect of Selenium Dioxide for Better Photocatalytic Performance of Conventional Semiconductors Distributed into Mesoporous SBA‐15

Contact Info

Product

Resources

About

Ag-Cu2O composite films with enhanced photocatalytic activities for methylene blue degradation: Analysis of the mechanism and the degradation pathways

Cited by 95 publications

References 49 publications

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD3/Fe6 Composite: Mechanistic Studies

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD3/Fe6 Composite: Mechanistic Studies

Enhanced photoactive performance of three-layer structured Ag/Cu2O/TiO2 composites with tunable crystal microstructures

Synergistic Effect of Selenium Dioxide for Better Photocatalytic Performance of Conventional Semiconductors Distributed into Mesoporous SBA‐15

Contact Info

Product

Resources

About

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD₃/Fe₆ Composite: Mechanistic Studies

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD₃/Fe₆ Composite: Mechanistic Studies

Enhanced photoactive performance of three-layer structured Ag/Cu₂O/TiO₂ composites with tunable crystal microstructures