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Tu Z, Tian F, Li X, Tian D, Li R, Wu Z. Cyclodextrin functionalization enhancement in a CA-β-CD/g-C 3N 4/Ag 2CO 3 Z-type heterojunction towards efficient photodegradation of organic pollutants. REACT CHEM ENG 2023. [DOI: 10.1039/d3re00025g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
More free radicals can be produced quickly by CA-β-CD/CN/Ag2CO3, leading to more effective and stable photocatalytic activity. The interfacial charge separation has been improved by the CA-β-CD modified CN/Ag2CO3 heterojunction.
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Affiliation(s)
- Zhuo Tu
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Fei Tian
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Xue Li
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Duoduo Tian
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Runze Li
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Zhansheng Wu
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
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Zhao Y, Yang H, Hao H, Zhu F, Zhang G, Bi J, Yan S, Hou H. Construction of an S-Scheme Ag 2MoO 4/ZnFe 2O 4 Nanofiber Heterojunction for Enhanced Photoelectrocatalytic Activity under Visible Light Irradiation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:13437-13447. [PMID: 36288509 DOI: 10.1021/acs.langmuir.2c01881] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The removal of organic dyes and pathogenic bacteria from contaminated water remains a significant challenge. In the present study, S-type heterojunction Ag2MoO4/ZnFe2O4 (AMO/ZFO) composite nanofibers were synthesized by electrospinning and co-precipitation and fabricated into photoanodes. It is found that the constructed S-type heterojunction of AMO/ZFO composites effectively inhibits the recombination of photogenerated carriers, in addition to the benefits of more exposed active sites and a greater specific surface area. When several properties are improved, AMO/ZFO composites exhibit excellent photoelectrocatalytic performance. The results demonstrate that under visible light irradiation, the photoelectrocatalytic degradation rate of AMO/ZFO-3 to methylene blue reached 76.2% within 50 min, and the killing rate of Salmonella was 83.6% within 80 min. The enhanced photoelectrocatalytic activity was due to the synergy of both electrochemical and photocatalytic effects. More importantly, after four testing cycles, AMO/ZFO-3 still has a better ability to kill pathogenic bacteria and degrade organic dyes due to its high stability. This work provides a feasible method for oxidizing organic dyes and pathogenic bacteria.
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Affiliation(s)
- Yirui Zhao
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
| | - Hang Yang
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
- Department of Inorganic Nonmetallic Materials Engineering, Dalian Polytechnic University, Dalian116034, China
| | - Hongshun Hao
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
- Department of Inorganic Nonmetallic Materials Engineering, Dalian Polytechnic University, Dalian116034, China
| | - Fuxiao Zhu
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
- Department of Inorganic Nonmetallic Materials Engineering, Dalian Polytechnic University, Dalian116034, China
| | - Gongliang Zhang
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
| | - Jingran Bi
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
| | - Shuang Yan
- Department of Inorganic Nonmetallic Materials Engineering, Dalian Polytechnic University, Dalian116034, China
| | - Hongman Hou
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
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Park S, Park T, Park JH, Min JY, Jung Y, Kyoung S, Kang TY, Kim KH, Rim YS, Hong J. Ag 2O/β-Ga 2O 3 Heterojunction-Based Self-Powered Solar Blind Photodetector with High Responsivity and Stability. ACS APPLIED MATERIALS & INTERFACES 2022; 14:25648-25658. [PMID: 35611950 DOI: 10.1021/acsami.2c03193] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Self-powered deep-ultraviolet photodetectors have received considerable attention in recent years because of their efficiency, reliability, and various applications in civilian and military fields. Herein, a Ag/Ag2O layer is continuously deposited on a β-Ga2O3 epitaxial layer by a facing target sputtering system without opening the chamber, which has an advantage in time and cost. A p-n junction photodetector was constructed through the Ag2O/β-Ga2O3 heterojunction and by varying the thickness of the Ag film, which was controlled by the sputtering time. The effect of top electrode thickness on the photoresponse characteristics of photodetectors was studied. Because thin Ag films have low surface roughness, indicating low optical loss and good interfacial conditions, photodetectors using a thin Ag film as the top electrode exhibit high photoresponsivity. However, Ag films that were thinner than the threshold thickness, which is the minimum thickness required to form a continuous, homogeneous surface film, exhibited rather low performance owing to the high reflection and scattering caused by the inhomogeneous surface morphology. The as-fabricated photodetector with a 20 nm Ag film presents a high on/off ratio of 3.43 × 108, responsivity and detectivity of 25.65 mA/W and 6.10 × 1011 Jones, respectively, and comparable rise and decay times of 108 and 80 ms, respectively. Additionally, even after three months of storage in an ambient environment, the photoresponse of the photodetector was maintained, indicating good stability in air. These results suggest that Ag2O/β-Ga2O3 heterojunction-based photodetectors with thin Ag films can be used in various applications requiring deep-ultraviolet detection without an external power supply.
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Affiliation(s)
- Sangbin Park
- Department of Electrical Engineering, College of IT Convergence, Gachon University, 1342, Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Taejun Park
- Department of Electrical Engineering, College of IT Convergence, Gachon University, 1342, Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Joon Hui Park
- Intelligent Mechatronics Engineering, College of Software Convergence, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea
| | - Ji Young Min
- Intelligent Mechatronics Engineering, College of Software Convergence, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea
| | - Yusup Jung
- PowerCubeSemi, Inc., 686, Cheonggyesan-ro, Sujeong-gu, Seongnam-si, Gyeonggi-do 13105, Republic of Korea
| | - Sinsu Kyoung
- PowerCubeSemi, Inc., 686, Cheonggyesan-ro, Sujeong-gu, Seongnam-si, Gyeonggi-do 13105, Republic of Korea
| | - Tai-Young Kang
- PowerCubeSemi, Inc., 686, Cheonggyesan-ro, Sujeong-gu, Seongnam-si, Gyeonggi-do 13105, Republic of Korea
| | - Kyung Hwan Kim
- Department of Electrical Engineering, College of IT Convergence, Gachon University, 1342, Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - You Seung Rim
- Intelligent Mechatronics Engineering, College of Software Convergence, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea
| | - Jeongsoo Hong
- Department of Electrical Engineering, College of IT Convergence, Gachon University, 1342, Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
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Yang W, Jing L, Wang T, Kong X, Quan R, Li X, Zhang D, Zhou R, Zhu H. Multi-level porous layered biochar modified cobalt-iron composite as a reusable synergistic activator of peroxymonosulfate for enhanced tetracycline degradation. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2022.104209] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zamani S, Rahimi MR, Ghaedi M. Spinning disc photoreactor based visible-light-driven Ag/Ag 2O/TiO 2 heterojunction photocatalyst film toward the degradation of amoxicillin. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 303:114216. [PMID: 34896858 DOI: 10.1016/j.jenvman.2021.114216] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 11/23/2021] [Accepted: 11/29/2021] [Indexed: 06/14/2023]
Abstract
The presence of antibiotics in waste and drinking water is causing increasing concern around the world, thereby an advanced sustainable technology needs to be developed to eliminate the antibiotics from water resources. Hence, an efficient spinning disc photoreactor (SDPR) equipped with visible light-activated Ag/Ag2O/TiO2 heterostructure thin film photocatalyst was assessed for the degradation of amoxicillin (AMX) as a typical antibiotic. The surface morphology, optoelectronic and structural features of Ag/Ag2O/TiO2 heterojunction were characterized by TEM, BET, mott Schottky, FESEM, EDS, AFM, XRD, UV-Vis-DRS, and contact angle measurements. Results confirm that Ag and Ag2O have a significant effect on the photocharge carrier separation and transfer of the as-developed photocatalyst system. The operative variables including illumination time, rotational speed, solution flow rate, aeration rate, pH, and initial AMX concentration were optimized by CCD. The results displayed the maximum AMX photodegradation (97.91%) could be achieved at optimal conditions involving illumination time of 80 min, a rotational speed of 225 rpm, the solution flow rate of 0.6 L/min, aeration rate of 20 L/min, pH = 6, and initial AMX concentration of 20 mg/L. Interestingly, more than 79% COD and 64% TOC were removed under optimum conditions during 80 min illumination time, respectively. Active species tests confirmed the dominant role of ·OH and ·O2- in AMX degradation. finally, the XRD pattern confirmed that the reusability assessments of the heterojunction film could successfully retain its stability for six consecutive photocatalytic degradation runs. This work demonstrates the feasibility of utilizing visible-light-driven thin-film photocatalysts in spinning disc photoreactors in treating the tenacious antibiotic pollutants.
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Affiliation(s)
- S Zamani
- Process Intensification Laboratory, Department of Chemical Engineering, Yasouj University, Yasouj, 75918-74831, Iran
| | - M R Rahimi
- Process Intensification Laboratory, Department of Chemical Engineering, Yasouj University, Yasouj, 75918-74831, Iran.
| | - M Ghaedi
- Department of Chemistry, Yasouj University, Yasouj, 75918-74831, Iran
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