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Wei X, Naraginti S, Yang X, Xu X, Li J, Sun J, Liu Z, Pei J. A novel magnetic AgVO 3/rGO/CuFe 2O 4 hybrid catalyst for efficient hydrogen evolution and photocatalytic degradation. ENVIRONMENTAL RESEARCH 2023; 229:115948. [PMID: 37105284 DOI: 10.1016/j.envres.2023.115948] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/08/2023] [Accepted: 04/18/2023] [Indexed: 05/21/2023]
Abstract
A superior semiconductor material with efficient charge separation and easy reuse could be a promising route for efficient photocatalytic hydrogen evolution and pollutant degradation. AgVO3 is one of the best visible light active materials which has attracted much attention for several biological and environmental applications. In the aim of enhancing its stability and recyclability a novel AgVO3/rGO/CuFe2O4 heterojunction was prepared by hydrothermal method for hydrogen generation (H2) and 4-nitrophenol (4-NP) degradation as well. The composite was well characterized by XRD, SEM, HR-TEM, XPS and VSM. The morphological images suggested the rod shaped AgVO3 and irregular shaped CuFe2O4 are unevenly distributed on reduced graphene oxide (rGO) layers. The hydrogen evolution results indicated that the composite showed around 8.937 mmol g-1h-1 of H2 generation which was ∼2.3 times and ∼9.2 times higher than pure AgVO3 (3.895 mmol g-1h-1) and CuFe2O4 (0.96 mmol g-1h-1) respectively. The 4-NP degradation efficiency of the prepared composite was observed as 94.7% (k = 0.01841 min-1) which is much higher than the AgVO3 (66.3%) and CuFe2O4 (38.2%) after 4 h of irradiation. The higher efficiency could be attributed to the heterojunction formation and faster charge separation. The radical trapping results indicated that the •OH, O2•- and photogenerated h+ are the main species responsible for efficient activity. The AgVO3/rGO/CuFe2O4 heterojunction showed 49.6 emu/g of saturation magnetization and confirms that it could be easily separated with an external magnet, and showed 85.3% of degradation efficiency even after 6 recycles which indicated its higher stability and recyclability. Thus, our study provides new insight into hydrogen generation and phenol degradation using AgVO3 based recyclable composites.
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Affiliation(s)
- Xueyu Wei
- School of Civil Engineering and Architecture, Anhui Polytechnic University, Wuhu, 241000, PR China
| | - Saraschandra Naraginti
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, 241000, PR China.
| | - Xiaofan Yang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, 241000, PR China.
| | - Xiaoping Xu
- School of Civil Engineering and Architecture, Anhui Polytechnic University, Wuhu, 241000, PR China
| | - Jiyuan Li
- School of Civil Engineering and Architecture, Anhui Polytechnic University, Wuhu, 241000, PR China
| | - Junwei Sun
- School of Civil Engineering and Architecture, Anhui Polytechnic University, Wuhu, 241000, PR China
| | - Zhigang Liu
- Ningbo Water Environment Group Co Ltd, Ningbo, 315041, PR China
| | - Jiang Pei
- College of Environment, Hohai University, Nanjing, 210098, PR China
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Uddin I, Abzal SM, Kalyan K, Janga S, Rath A, Patel R, Gupta DK, Ravindran TR, Ateeq H, Khan MS, Dash JK. Starch-Assisted Synthesis of Bi 2S 3 Nanoparticles for Enhanced Dielectric and Antibacterial Applications. ACS OMEGA 2022; 7:42438-42445. [PMID: 36440104 PMCID: PMC9685785 DOI: 10.1021/acsomega.2c05593] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/26/2022] [Indexed: 06/16/2023]
Abstract
Starch [(C6H10O5) n ]-stabilized bismuth sulfide (Bi2S3) nanoparticles (NPs) were synthesized in a single-pot reaction using bismuth nitrate pentahydrate (Bi(NO3)3·5H2O) and sodium sulfide (Na2S) as precursors. Bi2S3 NPs were stable over time and a wide band gap of 2.86 eV was observed. The capping of starch on the Bi2S3 NPs prevents them from agglomeration and provides regular uniform shapes. The synthesized Bi2S3 NPs were quasispherical, and the measured average particle size was ∼11 nm. The NPs are crystalline with an orthorhombic structure as determined by powder X-ray diffraction and transmission electron microscopy. The existence and interaction of starch on the NP's surface were analyzed using circular dichroism. Impedance spectroscopy was used to measure the electronic behavior of Bi2S3 NPs at various temperatures and frequencies. The dielectric measurements on the NPs show high dielectric polarizations. Furthermore, it was observed that the synthesized Bi2S3 NPs inhibited bacterial strains (Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus) and demonstrated substantial antibacterial activity.
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Affiliation(s)
- Imran Uddin
- Department
of Physics, SRM University-AP, Amaravati522502, India
| | - Shaik M. Abzal
- Department
of Physics, SRM University-AP, Amaravati522502, India
| | - Kurapati Kalyan
- Department
of Physics, SRM University-AP, Amaravati522502, India
| | - Sailakshmi Janga
- Department
of Physics, SRM University-AP, Amaravati522502, India
| | - Ashutosh Rath
- CSIR-Institute
of Minerals and Materials Technology, Bhubaneswar, Odisha751013, India
| | - Rajkumar Patel
- Energy
and Environmental Science and Engineering (EESE), Integrated Science
and Engineering Division (ISED), Underwood International College, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon21983, South Korea
| | - Deepak K. Gupta
- Materials
Science Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam603102, India
| | - T. R. Ravindran
- Materials
Science Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam603102, India
| | - Hira Ateeq
- Department
of Biochemistry, Aligarh Muslim University, Aligarh, Uttar Pradesh202002, India
| | - Mohd Sajid Khan
- Department
of Biochemistry, Aligarh Muslim University, Aligarh, Uttar Pradesh202002, India
| | - Jatis K. Dash
- Department
of Physics, SRM University-AP, Amaravati522502, India
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