1
|
MoS2 composite hydrogel supported by two-dimensional montmorillonite nanosheets for Pb2+ removal from water. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
2
|
Rao G, Liu X, Liu P. Fabrication of MoS2@TiO2 hollow‐sphere heterostructures with enhanced visible light photocatalytic reduction of U(VI). J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-021-08091-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
3
|
Zhang Y, He S, Zhang Y, Feng Y, Pan Z, Zhang M. Facile synthesis of PPy@MoS2 hollow microtubes for removal of cationic and anionic dyes in water treatment. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
4
|
Jiang Q, Han Z, Yuan Y, Cheng Z. Preparation and properties of floral CaO/ZnO composite from Achatina fulica snail shell. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:61841-61847. [PMID: 34550517 DOI: 10.1007/s11356-021-16260-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 08/26/2021] [Indexed: 06/13/2023]
Abstract
In this study, CaO prepared by calcination treatment from abandoned Achatina fulica shell was used as a raw material, and the floral CaO/ZnO photocatalytic composite material was prepared through co-precipitation method. SEM study showed ZnO with spindle-like petals in the range of 500-1000 nm grown on the surface of CaO carrier. The mapping image shows that the base component of the floral structure is mainly CaO, which is because CaO is not only in the reaction as a carrier, but also creates an alkaline environment in the methanol system, which is advantageous for co-precipitation. UV-vis spectroscopy shows that the visible light absorption of composites has red shifts; besides, PL, EIS, and photocurrent test showed that the composites have stronger electronic hole separation capabilities. The visible light degradation test of rhodamine B showed that CaO/ZnO photocatalytic composite could degrade 90% of the pollutants in 25 min, superior to CaO and ZnO, exhibiting recyclability properties, which is a potential candidate with cost-effective and sustainable photocatalysts.
Collapse
Affiliation(s)
- Qiushi Jiang
- College of Resources and Environment, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Zhaolian Han
- College of Resources and Environment, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Yafeng Yuan
- College of Resources and Environment, Jilin Agricultural University, Changchun, 130118, People's Republic of China
| | - Zhiqiang Cheng
- College of Resources and Environment, Jilin Agricultural University, Changchun, 130118, People's Republic of China.
| |
Collapse
|
5
|
Kite S, Kadam AN, Sathe DJ, Patil S, Mali SS, Hong CK, Lee S, Garadkar KM. Nanostructured TiO 2 Sensitized with MoS 2 Nanoflowers for Enhanced Photodegradation Efficiency toward Methyl Orange. ACS OMEGA 2021; 6:17071-17085. [PMID: 34250364 PMCID: PMC8264933 DOI: 10.1021/acsomega.1c02194] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/15/2021] [Indexed: 05/27/2023]
Abstract
Nanostructured titanium dioxide (TiO2) has a potential platform for the removal of organic contaminants, but it has some limitations. To overcome these limitations, we devised a promising strategy in the present work, the heterostructures of TiO2 sensitized by molybdenum disulfide (MoS2) nanoflowers synthesized by the mechanochemical route and utilized as an efficient photocatalyst for methyl orange (MO) degradation. The surface of TiO2 sensitized by MoS2 was comprehensively characterized by X-ray diffraction (XRD), Raman spectroscopy, Fourier transform-infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), photoluminescence spectroscopy (PL), Brunauer-Emmett-Teller (BET) surface area, and thermogravimetric analysis (TGA). From XRD results, the optimized MoS2-TiO2 (5.0 wt %) nanocomposite showcases the lowest crystallite size of 14.79 nm than pristine TiO2 (20 nm). The FT-IR and XPS analyses of the MoS2-TiO2 nanocomposite exhibit the strong interaction between MoS2 and TiO2. The photocatalytic results show that sensitization of TiO2 by MoS2 drastically enhanced the photocatalytic activity of pristine TiO2. According to the obtained results, the optimal amount of MoS2 loading was assumed to be 5.0 wt %, which exhibited a 21% increment of MO photodegradation efficiency compared to pristine TiO2 under UV-vis light. The outline of the overall study describes the superior photocatalytic performance of 5.0 wt % MoS2-TiO2 nanocomposite which is ascribed to the delayed recombination by efficient charge transfer, high surface area, and elevated surface oxygen vacancies. The context of the obtained results designates that the sensitization of TiO2 with MoS2 is a very efficient nanomaterial for photocatalytic applications.
Collapse
Affiliation(s)
- Sagar
V. Kite
- Nanomaterials
Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra 416004, India
| | - Abhijit Nanaso Kadam
- Department
of Chemical and Biological Engineering, Gachon University, Seongnamdaero, Seongnam-si 1342, Republic
of Korea
| | - Dattatraya J. Sathe
- Department
of Chemistry, KIT’s College of Engineering
(Autonomous), Kolhapur, Maharashtra 416234, India
| | - Satish Patil
- Nanomaterials
Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra 416004, India
| | - Sawanta S. Mali
- Polymer
Energy Materials Laboratory, School of Advanced Chemical Engineering, Chonnam National University, Gwangju 61186, South Korea
| | - Chang Kook Hong
- Polymer
Energy Materials Laboratory, School of Advanced Chemical Engineering, Chonnam National University, Gwangju 61186, South Korea
| | - Sang−Wha Lee
- Department
of Chemical and Biological Engineering, Gachon University, Seongnamdaero, Seongnam-si 1342, Republic
of Korea
| | - Kalyanrao M. Garadkar
- Nanomaterials
Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra 416004, India
| |
Collapse
|
6
|
Omar AMA, Hassen A, Metwalli OI, Saber MR, Mohamed SRE, Khalil ASG. Construction of 2D layered TiO 2@MoS 2heterostructure for efficient adsorption and photodegradation of organic dyes. NANOTECHNOLOGY 2021; 32:335605. [PMID: 33971641 DOI: 10.1088/1361-6528/abff8a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 05/09/2021] [Indexed: 06/12/2023]
Abstract
In this work, heterostructures of coupled TiO2@MoS2with different phases of MoS2were synthesized via hydrothermal technique. The prepared materials were thoroughly characterized using various techniques, including XRD, SEM, transmission electron microscopy, Brunauer-Emmet-Teller, XPS, Zeta potential and UV-vis spectroscopy. The optimized nanocomposites were tested for the photocatalytic degradation of methyl Orange (MO) under visible light as well as the adsorption of Rhodamine b (RhB) and methelene blue (MB) dyes. The TiO2@1T/2H-MoS2heterostructures exhibited a narrow bandgap compared to the other studied nanomaterials. A remarkable photodegradation efficiency of TiO2@1T/2H-MoS2was observed, which completely degraded 20 ppm of MO after 60 min with high stability over four successive cycles. This can be assigned to the formation of unique heterostructures with aligned energy bands between MoS2nanosheets and TiO2nanobelts. The formation of these novel interfaces promoted the electron transfer and increased the separation efficiency of carriers, resulting in high photocatalytic degradation. Furthermore, the adsorption efficiency of TiO2@1T/2H-MoS2was unique, 20 ppm solutions of RhB and MB were removed after 1 and 2 min, respectively. The superior adsorption performance of the TiO2@1T/2H-MoS2can be attributed to its high surface area (279.9 m2g-1) and the rich concentration of active sites. The kinetics and the isothermal analysis revealed that the TiO2@1T/2H MoS2heterstructures have maximum adsorption capacity of 1200 and 970 mg g-1for RhB and MB, respectively. This study provides a powerful way for designing an effective photocatalyst and adsorbent TiO2-based nanocomposites for water remediation.
Collapse
Affiliation(s)
- Asmaa M A Omar
- Physics Department, Faculty of Science, Fayoum University, 63514 Fayoum, Egypt
| | - Arafa Hassen
- Physics Department, Faculty of Science, Fayoum University, 63514 Fayoum, Egypt
| | - Ossama I Metwalli
- Physics Department, Faculty of Science, Fayoum University, 63514 Fayoum, Egypt
| | - Mohamed R Saber
- Chemistry Department, Faculty of Science, Fayoum University, 63514 Fayoum, Egypt
| | - Sayed R E Mohamed
- Physics Department, Faculty of Science, Fayoum University, 63514 Fayoum, Egypt
| | - Ahmed S G Khalil
- Physics Department, Faculty of Science, Fayoum University, 63514 Fayoum, Egypt
- Materials Science & Engineering Department, School of Innovative Design Engineering, Egypt-Japan University of Science and Technology (E-JUST), 179 New Borg El-Arab City, Egypt
| |
Collapse
|
7
|
Jiang Q, Wang S, Li X, Han Z, Zhao C, Di T, Liu S, Cheng Z. Controllable growth of MoS 2 nanosheets on TiO 2 burst nanotubes and their photocatalytic activity. RSC Adv 2020; 10:40904-40915. [PMID: 35519211 PMCID: PMC9057720 DOI: 10.1039/d0ra08421b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 11/03/2020] [Indexed: 01/02/2023] Open
Abstract
MoS2 nanosheets were grown on TiO2 nanotubes by the simple hydrothermal method for the first time. The layer-by-layer growth of MoS2 nanosheets led to a significant increase in the specific surface area of TiO2/MoS2 burst tube composites compared with TiO2 burst tubes, a significantly enhanced ability to separate photo-induced carriers, and synergistic adsorption and visible light catalytic activity of dye molecules. The maximum adsorption (q max) of MB was 72.46 mg g-1. In addition, 94.1% of MB could be degraded after 30 minutes of visible light irradiation. The microsurface morphology, structure, chemical composition, element valence and band width of TiO2/MoS2 nanocomposites were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS) and photoluminescence spectroscopy (PL). The mechanism of photocatalytic reaction was studied via free radical capture experiments.
Collapse
Affiliation(s)
- Qiushi Jiang
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Shang Wang
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Xue Li
- College of Information Technology, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Zhaolian Han
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Chunli Zhao
- College of Horticulture, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Tingting Di
- Northeast Electric Power Design Institue Co.,LTD. of China Power Engineering Consulting Group Changchun 130021 People's Republic of China
| | - Siyuan Liu
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Zhiqiang Cheng
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
| |
Collapse
|