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Lee J, Lee Y, Yu J, Yim K, Kadam AN, Lee SW. Interface engineered cascade-type electronic structure of 2D/0D/2D CdS-CdCO 3/SnO 2 quantum dots/g-C 3N 4 nanocomposite for boosting solar-driven photocatalysis. ENVIRONMENTAL RESEARCH 2024; 256:119202. [PMID: 38782343 DOI: 10.1016/j.envres.2024.119202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 05/15/2024] [Accepted: 05/20/2024] [Indexed: 05/25/2024]
Abstract
A rational design of heterojunctions with high-quality contacts is essential for efficiently separating photogenerated charge carries and boosting the solar-driven harvesting capability. Herein, we fabricated a novel heterojunction of SnO2 quantum dots-anchored CdS-CdCO3 with g-C3N4 nanosheets as a superior photocatalyst. SnO2 quantum dots (SQDs) with positively charged surfaces were tightly anchored on the negatively charged surface of CdS nanosheets (NSs). The resulting CdS@SnO2 was finally decorated with g-C3N4 NSs, and a new crystalline phase of CdS-CdCO3 was formed during the hydrothermal decoration process, g-C3N4 decorated CdS-CdCO3@SnO2 (CdS-CdCO3@SnO2@g-C3N4). The as-synthesized photocatalysts were evaluated for the degradation of methyl orange dye under solar light conditions. The CdS-CdCO3@SnO2@g-C3N4 exhibited 7.7-fold and 2.3-fold enhancements in photocatalytic activities in comparison to those of the bare CdS and CdS@SnO2 NSs, respectively. The optimal performance of CdS-CdCO3@SnO2@g-C3N4 is primarily attributed to the cascade-type conduction band alignments between 2D/0D/2D heterojunctions, which can harvest maximum solar light and effectively separate photoexcited charge carriers. This work provides a new inspiration for the rational design of 2D/0D/2D heterojunction photocatalyst for green energy generation and environmental remediation applications.
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Affiliation(s)
- JinHyeok Lee
- Department of Chemical and Biological Engineering, Gachon University, San 65, Bokjeong-Dong, Sujeong-Gu, Seongnam City, Gyeonggi-do, 461-701, South Korea
| | - Yechan Lee
- Department of Chemical and Biological Engineering, Gachon University, San 65, Bokjeong-Dong, Sujeong-Gu, Seongnam City, Gyeonggi-do, 461-701, South Korea
| | - Jii Yu
- Department of Chemical and Biological Engineering, Gachon University, San 65, Bokjeong-Dong, Sujeong-Gu, Seongnam City, Gyeonggi-do, 461-701, South Korea
| | - Kiseong Yim
- Department of Chemical and Biological Engineering, Gachon University, San 65, Bokjeong-Dong, Sujeong-Gu, Seongnam City, Gyeonggi-do, 461-701, South Korea
| | - Abhijit N Kadam
- Department of Chemical and Biological Engineering, Gachon University, San 65, Bokjeong-Dong, Sujeong-Gu, Seongnam City, Gyeonggi-do, 461-701, South Korea; Department of Chemistry, John Wilson Education Society's, Wilson College (Autonomous), Mumbai, Maharashtra, 400007, India.
| | - Sang-Wha Lee
- Department of Chemical and Biological Engineering, Gachon University, San 65, Bokjeong-Dong, Sujeong-Gu, Seongnam City, Gyeonggi-do, 461-701, South Korea.
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Li M, Fang Q, Lai Y, Chen L, Fu Q, He J, Chen Y, Jiang L, Yan Z, Wang J. CdS Nanoparticles Supported by Cobalt@Carbon-Derived MOFs for the Improved Adsorption and Photodegradation of Ciprofloxacin. Int J Mol Sci 2023; 24:11383. [PMID: 37511143 PMCID: PMC10380313 DOI: 10.3390/ijms241411383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/05/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
The design and synthesis of efficient photocatalysts that promote the degradation of organic pollutants in water have attracted extensive attention in recent years. In this work, CdS nanoparticles are grown in situ on Co@C derived from metal-organic frameworks. The resulting hierarchical CdS/Co@C nanostructures are evaluated in terms of their adsorption and photocatalytic ciprofloxacin degradation efficiency under visible-light irradiation. The results show that, apart from offering a large surface area (55.69 m2·g-1), the prepared material can effectively suppress the self-agglomeration of CdS and enhance the absorption of visible light. The CdS/Co@C-7 composite containing 7% wt Co@C has the highest photodegradation rate, and its activity is approximately 4.4 times greater than that of CdS alone. Moreover, this composite exhibits remarkable stability after three successive cycles of photocatalysis. The enhanced photocatalytic performance is largely ascribed to the rapid separation of electron-hole pairs and the effective electron transfer between CdS and Co@C, which is confirmed via electrochemical experiments and photoluminescence spectra. The active substance capture experiment and the electron spin resonance technique show that h+ is the main active entity implicated in the degradation of CIP, and accordingly, a possible mechanism of CIP photocatalytic degradation over CdS/Co@C is proposed. In general, this work presents a new perspective on designing novel photocatalysts that promote the degradation of organic pollutants in water.
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Affiliation(s)
- Mi Li
- School of Chemical Sciences & Technology, Yunnan University, Kunming 650091, China
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
| | - Qin Fang
- School of Chemical Sciences & Technology, Yunnan University, Kunming 650091, China
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
| | - Yan Lai
- School of Chemical Sciences & Technology, Yunnan University, Kunming 650091, China
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
| | - Luying Chen
- School of Chemical Sciences & Technology, Yunnan University, Kunming 650091, China
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
| | - Qiucheng Fu
- School of Chemical Sciences & Technology, Yunnan University, Kunming 650091, China
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
| | - Jiao He
- School of Chemical Sciences & Technology, Yunnan University, Kunming 650091, China
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
| | - Yongjuan Chen
- School of Chemical Sciences & Technology, Yunnan University, Kunming 650091, China
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
| | - Liang Jiang
- School of Chemical Sciences & Technology, Yunnan University, Kunming 650091, China
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
| | - Zhiying Yan
- School of Chemical Sciences & Technology, Yunnan University, Kunming 650091, China
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
| | - Jiaqiang Wang
- Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China
- School of Materials & Energy, Yunnan University, Kunming 650091, China
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3
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Bathula B, Eadi SB, Lee HD, Yoo K. ZnWO 4 nanorod-colloidal SnO 2 quantum dots core@shell heterostructures: Efficient solar-light-driven photocatalytic degradation of tetracycline. ENVIRONMENTAL RESEARCH 2023; 228:115851. [PMID: 37062476 DOI: 10.1016/j.envres.2023.115851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/30/2023] [Accepted: 04/03/2023] [Indexed: 05/16/2023]
Abstract
Zinc tungsten oxide (ZW) and colloidal SnO2 quantum dots (CS) were synthesized individually by hydrothermal and wet chemical methods. ZW-CS core@shell nanorods were prepared using a sonochemical method for the enhanced photocatalytic activity of tetracycline (TC) degradation. ZW-CS core@shell nanorods were systematically characterized by structural, morphological mapping and optical techniques. All characterization techniques were synchronized to confirm the construction of core@shell nanorods. Optical absorption studies indicate an increased light-capturing efficiency along with a reduced bandgap from 3.56 to 3.23 eV, which is further supported by photoluminescence. Mapping analysis from SEM and HR-TEM evidence the presence of elements as well as a core@shell nanostructure. The optimized sample of ZW-CS 1.0 shows improved photocatalytic degradation of TC under stimulated solar light. The TC degradation efficiency by ZW-CS 1.0 core@shell nanorods was about 97% within 2 h. The formation of core@shell nanorod structure might be the reason for the better photocatalytic tetracycline degradation performance.
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Affiliation(s)
- Babu Bathula
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea
| | - Sunil Babu Eadi
- Department of Electronics Engineering, Chungnam National University, Daejeon, South Korea.
| | - Hi-Deok Lee
- Department of Electronics Engineering, Chungnam National University, Daejeon, South Korea.
| | - Kisoo Yoo
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea.
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Smrithi SP, Kottam N, Narula A, Madhu GM, Mohammed R, Agilan R. Carbon dots decorated cadmium sulphide heterojunction-nanospheres for the enhanced visible light driven photocatalytic dye degradation and hydrogen generation. J Colloid Interface Sci 2022; 627:956-968. [PMID: 35901574 DOI: 10.1016/j.jcis.2022.07.100] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 07/13/2022] [Accepted: 07/17/2022] [Indexed: 01/14/2023]
Abstract
Carbon dots (C-dots) developed from beetroot is used for the rational design of cadmium sulphide based heterojunction photocatalysts (C-dots@CdS) using hydrothermal technique. The crystal structure, phase, morphology and optical characteristics of the synthesised materials are determined using X-ray diffraction (XRD), High resolution transmission electron microscopy (HR-TEM), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray analysis (EDAX), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, UV-Visible diffuse reflectance spectroscopy (UV-DRS), photoluminescence spectroscopy (PL spectroscopy), BET adsorption, X-ray photoelectron spectroscopy (XPS) and electrochemical studies. Using C-dots@CdS catalytic system, a superior photocatalytic activity relative to the undecorated CdS is observed. Among the C-dots@CdS samples, the CdS loaded with 6 wt% of C-dots exhibited enhanced hydrogen evolution rate compared with other samples considered for the study. CdS nanospheres modified with C-dots (6 wt%) resulted in the photocatalytic hydrogen evolution rate of 1582 µmolg-1 against 849 µmolg-1 evolution rate obtained for CdS nanospheres within 3 h. In spite of being 0D/0D type nano-heteroarchitecture, C-dots@CdS system obtained an apparent quantum yield of 6.37 % for the catalytic dosage of 20 mg under the irradiation of visible light. CdS in the C-dots@CdS system serves as the light harvester while C-dots with discernible edges can maintain the continuous supply of photo-excited charge carriers and hence can reduce the charge-carrier recombination. Further, the photodegradation of crystal violet dye using the optimised dosage of C-dots@CdS-6 exhibited an efficiency of 97.3 % in 120 min of visible light irradiation under neutral conditions. The detailed kinetic study reveals that the mechanism of photodegradation of crystal violet dye using C-dots@CdS system can be described using pseudo-second-order kinetics. The presence of oxygen rich hydrophilic surface functionalities of C-dots, the formation of near-surface heterojunction and the suitable band structure of C-dots@CdS system leading to the optimum charge carrier separation kinetics can be attributed to the enhanced photocatalytic performance. This work offers a promising strategy to develop bio-derived C-dots based heterojunction photocatalyst to address the burgeoning energy and environmental demands.
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Affiliation(s)
- S P Smrithi
- Department of Chemistry, M S Ramaiah Institute of Technology (An Autonomous Institute Affiliated to Visvesvaraya Technological University, Belgaum), Bengaluru 560054, India; Department of Chemistry/Biochemistry, M S Ramaiah College of Arts, Science and Commerce (Affiliated to Bangalore Central University), Bangalore 560054, India
| | - Nagaraju Kottam
- Department of Chemistry, M S Ramaiah Institute of Technology (An Autonomous Institute Affiliated to Visvesvaraya Technological University, Belgaum), Bengaluru 560054, India.
| | - Archna Narula
- Department of Chemical Engineering, M S Ramaiah Institute of Technology (An Autonomous Institute Affiliated to Visvesvaraya Technological University, Belgaum), Bengaluru 560054, India
| | - G M Madhu
- Department of Chemical Engineering, M S Ramaiah Institute of Technology (An Autonomous Institute Affiliated to Visvesvaraya Technological University, Belgaum), Bengaluru 560054, India
| | - Riyaz Mohammed
- Department of Chemical Engineering, M S Ramaiah Institute of Technology (An Autonomous Institute Affiliated to Visvesvaraya Technological University, Belgaum), Bengaluru 560054, India
| | - R Agilan
- Department of Chemical Engineering, M S Ramaiah Institute of Technology (An Autonomous Institute Affiliated to Visvesvaraya Technological University, Belgaum), Bengaluru 560054, India
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5
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Heterostructured Nanoscale Photocatalysts via Colloidal Chemistry for Pollutant Degradation. CRYSTALS 2022. [DOI: 10.3390/cryst12060790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
With the further acceleration in the industrialization process, organic pollutants and gas pollution in the environment have posed severe threats to human health. It has been a global challenge regarding achieving an efficient solution to pollutant degradation. In such a context, photocatalysts have attracted researchers’ attention for their simplicity, efficiency, cleanliness and low cost. However, the single photocatalyst is facing a research bottleneck owing to its narrow light absorption spectrum and high photocarrier recombination rate. Given that heterojunctions can achieve efficient separation of photogenerated carriers in space, constructing heterostructured photocatalysts has become the most perspective method to improve the performance of photocatalysts. Furthermore, nanoparticles prepared through colloidal chemistry have the characteristics of high dispersion, stability and adsorption, further enhancing the degradation efficiency of heterostructured photocatalysts. This article reviews the primary methods for preparing heterostructured photocatalysts through colloidal chemistry, classifies the heterojunction types by transport routes of photogenerated carriers and summarizes the recent progress of heterostructured photocatalysts in pollutant degradation. To implement environmental remediation, it is crucial to explore economical and efficient photocatalysts for practical applications. It is hoped that this review will stimulate further exploration of colloidal heterostructured photocatalysts for pollutant degradation.
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Babu B, Koutavarapu R, Shim J, Kim J, Yoo K. Improved sunlight-driven photocatalytic abatement of tetracycline and photoelectrocatalytic water oxidation by tin oxide quantum dots anchored on nickel ferrite nanoplates. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Kadam AN, Bathula C, Lee SW. In situ growth of 1D/2D CdS-Bi 2MoO 6 core shell heterostructures for synergistic enhancement of photocatalytic performance under visible light. CHEMOSPHERE 2021; 275:130086. [PMID: 33677274 DOI: 10.1016/j.chemosphere.2021.130086] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/01/2021] [Accepted: 02/21/2021] [Indexed: 06/12/2023]
Abstract
Stability of the photocatalyst, maximum solar energy harvesting and effective photogenerated charge carrier separation are yet demanding key features of the photocatalysis for pollutant abetment and photo-electrochemical applications. Herein, we report the in situ solvothermal synthesis of CdS-Bi2MoO6 core-shell heterostructures (CdS-Bi2MoO6 CSHs) for the photocatalytic elimination of methyl orange (MO) under visible light. The as-synthesized CdS-Bi2MoO6 CSHs exhibited highest photocatalytic performance of 98.5%, which is approximately 10 and 4 folds higher than pristine Bi2MoO6 nanosheets (NSs) and CdS nanorods (NRs), respectively. This significantly enhanced photocatalytic performance is attributed to the core-shell heterostructure that improves the visible-light harvesting ability, facilitates efficient separation and transfer of the photogenerated charge carriers, as well as synergistic band alignment of both CdS NRs and Bi2MoO6 NSs. The CdS-Bi2MoO6 CSHs also showed efficient photocatalytic performance toward methylene blue (MB) as colored dye and tetracycline hydrochloride (TCH) as a colorless emerging contaminant. Additionally, the outcomes of transient photocurrent, electrochemical impedance, and photoluminescence study further corroborate that the construction of core-shell heterostructures with tight contact, leading to effective charge carrier separation. The hole (h+) and superoxide radical anion (•O2-) were determined to be the predominant active species accountable for the MO dye degradation. Furthermore, the CdS-Bi2MoO6 CSHs exhibited a satisfactory recycling efficiency over five cycles (reduced by approximately 6%), owing to the protective Bi2MoO6 NSs shell over the CdS NRs core, demonstrating their applicability in wastewater purification and photo-electrochemical applications.
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Affiliation(s)
- Abhijit N Kadam
- Department of Chemical and Biological Engineering, Gachon University, Seongnam-Daero, 1342, Seongnam-Si, Republic of Korea.
| | - Chinna Bathula
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
| | - Sang-Wha Lee
- Department of Chemical and Biological Engineering, Gachon University, Seongnam-Daero, 1342, Seongnam-Si, Republic of Korea.
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Koutavarapu R, Tamtam MR, Rao MC, Peera SG, Shim J. Recent progress in transition metal oxide/sulfide quantum dots-based nanocomposites for the removal of toxic organic pollutants. CHEMOSPHERE 2021; 272:129849. [PMID: 33582511 DOI: 10.1016/j.chemosphere.2021.129849] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/06/2021] [Accepted: 01/30/2021] [Indexed: 06/12/2023]
Abstract
Water is an essential solvent that is extremely necessary for the survival of life. Water pollution due to the increased utilization of water for various processes, including domestic and industrial activities, poses a special threat that contaminates both surface and ground water. In recent years, advanced oxidation processes (AOPs) have been applied to deal with wastewater problems, which is a green method used to oxidize organic contaminants with strong oxidative radical species. Among the AOPs, photocatalytic technology is one of the most promising strategies for wastewater cleaning, which fulfills the aims of environmentally friendly and sustainable development. Owing to their unique electronic, optical, and structural properties, nanoscale semiconductors have received substantial interest as materials for AOPs, particularly inspired by their superb quantum confinement effects and large surface-area-to-volume ratio, which are essential for catalytic reaction kinetics. Recent advancements have revealed that semiconductor nanocrystals, known as quantum dots (QDs), are newly emerging zero-dimensional (0-D) nanomaterials, which have garnered much attention owing to their special physiochemical characteristics such as high conductivity, thermo-chemical and opto-mechanical stability, high adsorption coefficients, and, most importantly, their admirable recyclability. In this review, we provide a clear understanding of the importance of semiconductor QD-based nanocomposites in the degradation of organic pollutants, in addition to the mechanism involved in the reaction process. Following this, the enhancement of different materials, such as metal oxides and metal sulfide QD-based nanocomposites, is discussed in the context of combating environmental pollution.
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Affiliation(s)
| | - Mohan Rao Tamtam
- Chemical Engineering Department, Debre Berhan University, Debre Berhan 445, Ethiopia
| | - M C Rao
- Department of Physics, Andhra Loyola College, Vijayawada, 520-008, Andhra Pradesh, India.
| | - Shaik Gouse Peera
- Department of Environmental Science and Engineering, Keimyung University, Daegu, 42602, Republic of Korea.
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
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Babu B, Koutavarapu R, Shim J, Kim J, Yoo K. Enhanced solar-light-driven photocatalytic and photoelectrochemical properties of zinc tungsten oxide nanorods anchored on bismuth tungsten oxide nanoflakes. CHEMOSPHERE 2021; 268:129346. [PMID: 33360940 DOI: 10.1016/j.chemosphere.2020.129346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/19/2020] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
At present, sustainable water supply and energy generation are the most important challenges faced by humankind globally. Thus, it is crucial to progress ecological techniques for sustainable removal of organic pollutants from wastewater and generation of hydrogen as an alternative to fossil fuels. In this study, zinc tungsten oxide (ZnWO4) nanorods, bismuth tungsten oxide (Bi2WO6) nanoflakes, and Bi2WO6/ZnWO4 (BO-ZO) nanocomposites were prepared via a simple hydrothermal approach. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, diffuse reflectance spectroscopy, and electrochemical analyses were conducted to confirm the formation of the BO-ZO heterostructure. The structural and morphological analyses revealed that the ZnWO4 nanorods were moderately dispersed on the Bi2WO6 nanoflakes. The bandgap tuning of BO-ZO nanocomposite confirmed the establishment of the heterostructure with band bending properties. The BO-ZO nanocomposite could degrade 99.52% of methylene blue (MB) within 60 min upon solar-light illumination. The photoelectrochemical (PEC) measurement results showed that the BO-ZO nanocomposite showed low charge-transfer resistance and high photocurrent response with good stability. The BO-ZO photoanode showed a low charge-transfer resistance of 35.33 Ω and high photocurrent density of 0.1779 mA/cm2 in comparison with Ag/AgCl in a 0.1 M Na2SO3 electrolyte under solar-light illumination. The MB photocatalytic degradation and PEC water oxidation mechanisms of the nanocomposite were investigated.
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Affiliation(s)
- Bathula Babu
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
| | | | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea
| | - Jonghoon Kim
- Department of Electrical Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea.
| | - Kisoo Yoo
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
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10
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Core and dopant effects toward hydrogen gas sensing activity using Pd@N-CeO2 core–shell nanoflatforms. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.01.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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11
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Li Y, Shen J, Quan W, Diao Y, Wu M, Zhang B, Wang Y, Yang D. 2D/2D p‐n Heterojunctions of CaSb
2
O
6
/g‐C
3
N
4
for Visible Light‐Driven Photocatalytic Degradation of Tetracycline. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000635] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yuanyuan Li
- Department of Biological and Chemical Engineering Cooperative Innovation Center of Lipid Resources and Children's Daily Chemicals Chongqing University of Education 400067 Chongqing People's Republic of China
| | - Jinfeng Shen
- Department of Biological and Chemical Engineering Cooperative Innovation Center of Lipid Resources and Children's Daily Chemicals Chongqing University of Education 400067 Chongqing People's Republic of China
| | - Wenxuan Quan
- Department of Biological and Chemical Engineering Cooperative Innovation Center of Lipid Resources and Children's Daily Chemicals Chongqing University of Education 400067 Chongqing People's Republic of China
| | - Yue Diao
- Department of Biological and Chemical Engineering Cooperative Innovation Center of Lipid Resources and Children's Daily Chemicals Chongqing University of Education 400067 Chongqing People's Republic of China
| | - Meijun Wu
- Department of Biological and Chemical Engineering Cooperative Innovation Center of Lipid Resources and Children's Daily Chemicals Chongqing University of Education 400067 Chongqing People's Republic of China
| | - Bin Zhang
- Analytical and Testing Center Chongqing University 401331 Chongqing People's Republic of China
| | - Yaoqiong Wang
- College of Chemistry and Chemical Engineering Chongqing University of Technology 69 Hongguang Rd. 400054 Lijiatuo, Banan District Chongqing People's Republic of China
| | - Dingfeng Yang
- College of Chemistry and Chemical Engineering Chongqing University of Technology 69 Hongguang Rd. 400054 Lijiatuo, Banan District Chongqing People's Republic of China
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12
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Zheng X, Dong Y, Liu T. Simultaneous photodegradation of dyes by NiS/CuS-CdS composites in visible light region. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124854] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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13
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Koutavarapu R, Babu B, Reddy CV, Reddy IN, Reddy KR, Rao MC, Aminabhavi TM, Cho M, Kim D, Shim J. ZnO nanosheets-decorated Bi 2WO 6 nanolayers as efficient photocatalysts for the removal of toxic environmental pollutants and photoelectrochemical solar water oxidation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 265:110504. [PMID: 32275239 DOI: 10.1016/j.jenvman.2020.110504] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/25/2020] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
Herein we report the fabrication of novel Bi2WO6/ZnO heterostructured hybrids for organic contaminant degradation from wastewater and photoelectrochemical (PEC) water splitting upon solar illumination. The Bi2WO6/ZnO photocatalysts were synthesized using a simple and eco-friendly hydrothermal process without the support of any surfactants. From the photocatalytic experiments, heterostructured Bi2WO6/ZnO nanohybrid catalysts exhibited considerably better photocatalytic performance for rhodamine B (RhB) degradation under solar illumination. The BWZ-20 nanocomposite demonstrated superior photodegradation of RhB dye up to 99% in about 50 min. Furthermore, BWZ-20 photoelectrode showeda lower charge-transfer resistance than other samples prepared, suggesting its suitability for PEC water splitting. The photocurrent densities of Bi2WO6/ZnO photoelectrodes were evaluated under the solar irradiation. The BWZ-20 photoelectrode exhibited a significant photocurrent density (0.45 × 10-3A/cm2) at +0.3 V vs. Ag/AgCl, which was~1036-times higher than that of pure Bi2WO6, and ~4.8-times greater than the pure ZnO. Such improved photocatalytic and PEC activities are mainly attributed to the formation of an interface between ZnO and Bi2WO6, superior light absorption ability, low charge-transfer resistance, remarkable production of charge carriers, easy migration of charges, and suppression of the recombination of photogenerated charge carriers.
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Affiliation(s)
| | - Bathula Babu
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea
| | - Ch Venkata Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
| | - I Neelakanta Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea
| | - Kakarla Raghava Reddy
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia.
| | - M C Rao
- Department of Physics, Andhra Loyola College, Vijayawada, 520 008, Andhra Pradesh, India
| | - Tejraj M Aminabhavi
- Department of Pharmaceutics, SETs' College of Pharmacy, Dharwad, 580 007, Karnataka, India.
| | - Migyung Cho
- School of Information Engineering, Tongmyong University, Busan, 608-711, Republic of Korea
| | - Dongseob Kim
- Aircraft System Technology Group, Korea Institute of Industrial Technology, Gyeongbuk-do, 38822, Republic of Korea
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
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Enhanced visible-light-driven photoelectrochemical and photocatalytic performance of Au-SnO2 quantum dot-anchored g-C3N4 nanosheets. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116652] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Enhanced solar light–driven photocatalytic degradation of tetracycline and organic pollutants by novel one–dimensional ZnWO4 nanorod–decorated two–dimensional Bi2WO6 nanoflakes. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2020.03.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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16
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Ren M, Fu F, He Q, Liao F. A novel ZSMo core-shell nanowire: An efficient photocatalyst of H2 production. CATAL COMMUN 2020. [DOI: 10.1016/j.catcom.2020.105928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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17
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Doping induced enhanced photocatalytic performance of SnO2:Bi3+ quantum dots toward organic pollutants. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124416] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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18
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Hamdy MS, Berg O, Mul G. Size-tunable TiO2 nanoparticles in mesoporous silica: Size-dependent performance in selective photo-oxidation. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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In Situ Construction of a MgSn(OH) 6 Perovskite/SnO 2 Type-II Heterojunction: A Highly Efficient Photocatalyst towards Photodegradation of Tetracycline. NANOMATERIALS 2019; 10:nano10010053. [PMID: 31878320 PMCID: PMC7023148 DOI: 10.3390/nano10010053] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 12/20/2019] [Accepted: 12/21/2019] [Indexed: 11/16/2022]
Abstract
Using solar energy to remove antibiotics from aqueous environments via photocatalysis is highly desirable. In this work, a novel type-II heterojunction photocatalyst, MgSn(OH)6/SnO2, was successfully prepared via a facile one-pot in situ hydrothermal method at 220 °C for 24 h. The obtained heterojunctions were characterized via powder X-ray diffraction, Fourier-transform infrared spectroscopy, transmission electron microscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The photocatalytic performance was evaluated for photodegradation of tetracycline solution under ultraviolet irradiation. The initial concentration of tetracycline solution was set to be 20 mg/L. The prepared heterojunctions exhibited superior photocatalytic activity compared with the parent MgSn(OH)6 and SnO2 compounds. Among them, the obtained MgSn(OH)6/SnO2 heterojunction with MgCl2·6H2O:SnCl4·5H2O = 4:5.2 (mmol) displayed the highest photocatalytic performance and the photodegradation efficiency conversion of 91% could be reached after 60 min under ultraviolet irradiation. The prepared heterojunction maintained its performance after four successive cycles of use. Active species trapping experiments demonstrated that holes were the dominant active species. Hydroxyl radicals and superoxide ions had minor effects on the photocatalytic oxidation of tetracycline. Photoelectrochemical measurements were used to investigate the photocatalytic mechanism. The enhancement of photocatalytic activity could be assigned to the formation of a type-II junction photocatalytic system, which was beneficial for efficient transfer and separation of photogenerated electrons and holes. This research provides an in situ growth strategy for the design of highly efficient photocatalysts for environmental restoration.
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Yang L, Zhao Z, Wang H, Dong J, Wang L, Zhou Q, Wan X, Zhao R, Cai Z. Synthesis of ZnO/ZnS core/shell microsphere and its photocatalytic activity for methylene blue and eosin dyes degradation. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1653768] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Liqin Yang
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai, China
| | - Zhiju Zhao
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai, China
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
| | | | - Junfang Dong
- College of Marxism, Xingtai University, Xingtai, China
| | - Lili Wang
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai, China
| | - Qian Zhou
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai, China
| | - Xiang Wan
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai, China
| | - Ru Zhao
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai, China
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