1
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Wu Y, Liu J, Zhao J, Jin C, Ren H, Yin Y, Li Z. An oxygen vacancy-rich BiO 2-x/COF heterojunction for photocatalytic degradation of diclofenac. NANOSCALE 2024; 16:10645-10655. [PMID: 38766844 DOI: 10.1039/d4nr00608a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
A BiO2-x/COF composite was successfully synthesized by simple mechanical ball milling. Compared to pure BiO2-x and COFs, the BiO2-x/COF composite (1 : 9) showed superior photocatalytic capability. Under visible light irradiation for 90 min, the photocatalytic degradation rate of DCF reached 97%. In addition, the characterization results showed that the formation of heterojunctions and the increase in oxygen vacancy concentration were the reasons for the enhancement of the photocatalytic activity. It is confirmed by free radical capture experiments that ˙O2- and h+ are the main reactive substances in the photocatalytic process. The photocatalytic degradation mechanism of the composite and the photocatalytic degradation pathway of diclofenac were deduced.
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Affiliation(s)
- Yuze Wu
- Beijing University of Chemical Technology, Beijing 100029, China.
| | - Jingchao Liu
- School of Computer Science and Engineering, Beihang University, Beijing 100191, China.
| | - Jinxia Zhao
- Beijing University of Chemical Technology, Beijing 100029, China.
| | - Chunhong Jin
- Beijing University of Chemical Technology, Beijing 100029, China.
| | - Hailong Ren
- Beijing University of Chemical Technology, Beijing 100029, China.
| | - Yilin Yin
- Beijing University of Chemical Technology, Beijing 100029, China.
| | - Zenghe Li
- Beijing University of Chemical Technology, Beijing 100029, China.
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2
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Wang J, He J, Ma J, Wang X, Feng C, Zhou Q, Zhang H, Wang Y. In-Sb Covalent Bonds over Sb 2Se 3/In 2Se 3 Heterojunction for Enhanced Photoelectrochemical Water Splitting. Inorg Chem 2024; 63:10068-10078. [PMID: 38758008 DOI: 10.1021/acs.inorgchem.4c01388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Antimony selenide is a promising P-type photocatalyst, but it has a large number of deep energy level defects, leading to severe carrier recombination. The construction of a heterojunction is a common way to resolve this problem. However, the conventional heterojunction system inevitably introduces interface defects. Herein, we employ in situ synthesis to epitaxially grow In2Se3 nanosheets on Sb2Se3 nanorods and form In-Sb covalent interfacial bonds. This petal-shaped heterostructure reduced interface defects and enhanced the efficiency of carrier separation and transport. In this work, the photocurrent density in the proposed Sb2Se3/In2Se3 photocathode is 0.485 mA cm-2 at 0 VRHE, which is 30 times higher than that of pristine Sb2Se3 and it has prominent long-term stability for 24 h without obvious decay. The results reveal that the synergy of the bidirectional built-in electric field constructed between In2Se3 and Sb2Se3 and the solid In-Sb interfacial bonds together build a high-efficiency transport channel for the photogenerated carriers that display enhanced photoelectrochemical (PEC) water-splitting performance. This work provides efficient guidance for reducing interface defects via the in situ synthesis and construction of interfacial bonds.
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Affiliation(s)
- Junyu Wang
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, P. R. China
| | - Jialing He
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, P. R. China
| | - Jinling Ma
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, P. R. China
| | - Xiaodong Wang
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, P. R. China
| | - Chuanzhen Feng
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, P. R. China
| | - Qingxia Zhou
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, P. R. China
| | - Huijuan Zhang
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, P. R. China
| | - Yu Wang
- State Key Laboratory of Power Transmission Equipment Technology, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, P. R. China
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3
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Shi C, Zhang L, Shi Z, Wang Z, Ma J. Mechanistic investigation of cellulose regulating the morphology and photocatalytic activity of Al-doped ZnO. Int J Biol Macromol 2023; 228:435-444. [PMID: 36572077 DOI: 10.1016/j.ijbiomac.2022.12.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 12/05/2022] [Accepted: 12/20/2022] [Indexed: 12/25/2022]
Abstract
The morphology of metal oxide is a crucial factor for improving of catalysis properties. As a renewable and environmentally friendly biomass material, cellulose has been widely used to induce the morphology of semiconductors. The contributions of cellulose hydroxyl groups and spatial hindrance in tailoring Al doped ZnO (AZO) morphologies were investigated. The morphology of AZO could be gradually induced from flake-like to flower-like with the increase of cellulose hydroxyl content per unit volume. At the same time, the changes in spatial hindrance had no apparent effect on the morphology of AZO. So the cellulose hydroxyl groups that act to induce the in situ growth of AZO nanoparticles on cellulose substrates. The results further confirmed the strong interaction between cellulose hydroxyl groups and Zn2+. In addition, the photocatalytic activities of Al-doped ZnO/cellulose nanocomposites (AZOC) with different morphologies were evaluated by the degradation of bisphenol A (BPA). The high hydroxyl contents of cellulose substrates contributed to the growth of flower-like AZO with high light utilization and photocatalytic activity. This work proposed cleaner strategies to modify semiconductor morphologies for photocatalysis by regulating the content of cellulose hydroxyl contents.
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Affiliation(s)
- Chun Shi
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China; University Key Laboratory of Biomass Chemical Refinery & Synthesis, Southwest Forestry University, Kunming 650224, China
| | - Lili Zhang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Zhengjun Shi
- University Key Laboratory of Biomass Chemical Refinery & Synthesis, Southwest Forestry University, Kunming 650224, China
| | - Zhiguo Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Jinxia Ma
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.
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4
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Nguyen T, Maniyar A, Sarkar M, Sarkar TR, Neelgund GM. The Cytotoxicity of Carbon Nanotubes and Hydroxyapatite, and Graphene and Hydroxyapatite Nanocomposites against Breast Cancer Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:556. [PMID: 36770518 PMCID: PMC9919526 DOI: 10.3390/nano13030556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/21/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Cancer is a current dreadful disease and the leading cause of death. Next to cardiovascular diseases, cancer is the most severe threat to human life and health. Breast cancer is the most common invasive cancer diagnosed in women. Each year about 2.3 million women are diagnosed with breast cancer. In consideration of the severity of breast cancer, herein we designed the biocompatible nanomaterials, CNTs-HAP and GR-HAP, through grafting of hydroxyapatite (HAP) to carbon nanotubes (CNTs) and graphene (GR) nanosheets. CNTs-HAP and GR-HAP have been tested for their cytotoxicity, growth and motility inhibitory effects, and their effects on the mesenchymal markers. All these demonstrated significant dose-dependent and time-dependent in vitro cytotoxicity against SUM-159 and MCF-7 breast cancer cell lines. The cell viability assay showed that the CNTs-HAP was more effective over SUM-159 cells than MCF-7 cells. It found that the increase in the concentration of GR-HAP has inhibited the clonogenic ability of breast cancer cells. The GR-HAP exhibited a substantial inhibitory effect on the cell motility of SUM-159 cell lines. It was investigated that the expression of vimentin (mesenchymal marker) was majorly reduced in SUM-159 cells by GR-HAP.
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Affiliation(s)
- Tristan Nguyen
- Department of Biology, Texas A&M University, College Station, TX 77843, USA
| | - Anuj Maniyar
- Department of Biology, Texas A&M University, College Station, TX 77843, USA
| | - Mrinmoy Sarkar
- Department of Biology, Texas A&M University, College Station, TX 77843, USA
| | | | - Gururaj M. Neelgund
- Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA
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5
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Insights into the Electrochemical Behavior and Kinetics of NiP@PANI/rGO as a High-Performance Electrode for Alkaline Urea Oxidation. Electrocatalysis (N Y) 2022. [DOI: 10.1007/s12678-022-00718-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Yu M, Yuan X, Guo J, Tang N, Ye S, Liang J, Jiang L. Selective graphene-like metal-free 2D nanomaterials and their composites for photocatalysis. CHEMOSPHERE 2021; 284:131254. [PMID: 34216926 DOI: 10.1016/j.chemosphere.2021.131254] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 06/14/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
From the viewpoint of sustainability, graphene-like metal-free 2D nanomaterials (GMFs) hold great potential in different photocatalytic fields due to their distinct structures and properties. Although their lattice structures are highly similar, the properties of these nanomaterials are in vast diversity owing to the uniqueness of particular atomic arrangement, thus giving rise to their multi-faceted functionalities in photocatalytic process. In this review, we summarize the latest progress of GMFs and their hybrid composites in photocatalytic field, including graphene and its derivatives, hexagonal boron nitride (h-BN), graphitic carbon nitride (g-C3N4), black phosphorus (BP) and emerging 2D covalent organic frameworks (COFs). Their unique 2D structure and key photocatalytic properties are firstly briefly introduced. Then a critical discussion on their multiple roles in the activity enhancement of composite photocatalysts is emphasized, which in turn points out the direction of maximizing their functions and guides our efficient construction of hybrid photocatalysts based on above 2D nanomaterials. On this basis, a summary about the hybridization of above 2D metal-free materials is presented, and the merits of 2D/2D hybrid systems are elaborated. Last, we wrap up this review with some summative remarks, covering understanding their own unique strengths and weaknesses by comparison and proposing the major challenges and perspectives in this emerging field.
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Affiliation(s)
- Mengdie Yu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Xingzhong Yuan
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Jiayin Guo
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Ning Tang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Shujing Ye
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Jie Liang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
| | - Longbo Jiang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
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7
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Enhanced performance of lanthanum orthoferrite/chitosan nanocomposites for adsorptive photocatalytic removal of Reactive Black 5. KOREAN J CHEM ENG 2021. [DOI: 10.1007/s11814-021-0835-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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8
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Yang Y, Tan H, Cheng B, Fan J, Yu J, Ho W. Near-Infrared-Responsive Photocatalysts. SMALL METHODS 2021; 5:e2001042. [PMID: 34927853 DOI: 10.1002/smtd.202001042] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/22/2020] [Indexed: 06/14/2023]
Abstract
Broadening the absorption of light to the near-infrared (NIR) region is important in photocatalysis to achieve efficient solar-to-fuel conversion. NIR-responsive photocatalysts that can utilize diffusive solar energy are attractive for alleviating the energy crisis and environmental pollution. Over the past few years, considerable progress on the component and structural design of NIR-responsive photocatalysts have been reported. This study aims to systematically summarize recent progress toward the material design and mechanism optimization of NIR-responsive photocatalysts in this area. Depending on the main strategies for harvesting NIR photons, NIR-responsive photocatalysts can be categorized as direct NIR-light photocatalysts, indirect NIR-light photocatalysts, and photothermal photocatalysts. Furthermore, the construction and application of different NIR-responsive photocatalytic systems are summarized. Conclusions and perspectives are presented to further explore the potential of NIR-responsive photocatalysts in this field.
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Affiliation(s)
- Yi Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan, 528200, P. R. China
| | - Haiyan Tan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Bei Cheng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Jiajie Fan
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Jiaguo Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan, 528200, P. R. China
| | - Wingkei Ho
- Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories, Hong Kong, 999077, P. R. China
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9
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Neelgund GM, Oki A, Bandara S, Carson L. Photothermal effect and cytotoxicity of CuS nanoflowers deposited over folic acid conjugated nanographene oxide. J Mater Chem B 2021; 9:1792-1803. [PMID: 33393530 DOI: 10.1039/d0tb02366c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Herein, we present the rational synthesis of a multimode photothermal agent, NGO-FA-CuS, for the advancement of photothermal therapy of cancer. The hierarchical architecture created in NGO-FA-CuS was attained by the covalent conjugation of folic acid (FA) to nanographene oxide (NGO) through amide bonding, followed by the hydrothermal deposition of CuS nanoflowers. In this approach, instead of mere mixing or deposition, FA was covalently bonded to NGO, which helped in retaining their intrinsic properties after binding and allowed to access them in the resulting hybrid nanostructure. In this specifically designed photothermal agent, NGO-FA-CuS, each component has an explicit task, i.e., NGO, FA and CuS act as the quencher, cancer cell-targeting moiety and photothermal transduction agent, respectively. Prior to the grafting of FA molecules and the deposition of CuS nanoflowers, sulfonic acid groups were introduced into NGO to provide stability under physiological conditions. Under irradiation using a 980 nm laser, NGO-FA-CuS was able to attain a temperature of 63.1 °C within 5 min, which is far beyond the survival temperature for cancer cells. Therefore, the resulting temperature recorded for NGO-FA-CuS was sufficient to induce hyperthermia in cancer cells to cause their death. When coming into contact with cancer cells, NGO-FA-CuS can cause a rapid increase in the temperature of their nucleus, destroy the genetic substances, and ultimately lead to exhaustive apoptosis under illumination using a near-infrared (NIR) laser. An excellent photothermal efficiency of 46.2% under illumination using a 980 nm laser and outstanding cytotoxicity against HeLa, SKOV3 and KB cells were attained with NGO-FA-CuS. Moreover, NGO-FA-CuS displays exceptional persistent photo-stability without photo-corrosiveness. The photothermal effect of NGO-FA-CuS was found to be dependent on its concentration and the power density of the laser source. It was found that its cytotoxicity toward cancer cells was enhanced with an increase in the concentration of NGO-FA-CuS and the incubation period.
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Affiliation(s)
- Gururaj M Neelgund
- Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA.
| | - Aderemi Oki
- Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA.
| | - Subhani Bandara
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Laura Carson
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, TX 77446, USA
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10
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Getiren B, Çıplak Z, Gökalp C, Yıldız N. Novel approach in synthesizing ternary GO‐Fe
3
O
4
‐PPy nanocomposites for high Photothermal performance. J Appl Polym Sci 2020. [DOI: 10.1002/app.48837] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Bengü Getiren
- Department of Chemical EngineeringAnkara University, Faculty of Engineering 06100 Tandoğan Ankara Turkey
| | - Zafer Çıplak
- Department of Chemical EngineeringAnkara University, Faculty of Engineering 06100 Tandoğan Ankara Turkey
| | - Ceren Gökalp
- Department of Chemical EngineeringAnkara University, Faculty of Engineering 06100 Tandoğan Ankara Turkey
| | - Nuray Yıldız
- Department of Chemical EngineeringAnkara University, Faculty of Engineering 06100 Tandoğan Ankara Turkey
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11
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Pethsangave DA, Khose RV, Wadekar PH, Kulal DK, Some S. One‐Pot Synthetic Approach for Magnetically Separable Graphene Nanocomposite for Dye Degradation. ChemistrySelect 2020. [DOI: 10.1002/slct.201903966] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | - Rahul V. Khose
- Department of Dyestuff TechnologyInstitute of Chemical Technology Matunga, Mumbai 400 019 India
| | - Pravin H. Wadekar
- Department of Dyestuff TechnologyInstitute of Chemical Technology Matunga, Mumbai 400 019 India
| | - Dnyaneshwar K. Kulal
- Department of Dyestuff TechnologyInstitute of Chemical Technology Matunga, Mumbai 400 019 India
| | - Surajit Some
- Department of Dyestuff TechnologyInstitute of Chemical Technology Matunga, Mumbai 400 019 India
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12
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Jilani A, Rehman GU, Ansari MO, Othman MHD, Hussain SZ, Dustgeer MR, Darwesh R. Sulfonated polyaniline-encapsulated graphene@graphitic carbon nitride nanocomposites for significantly enhanced photocatalytic degradation of phenol: a mechanistic study. NEW J CHEM 2020. [DOI: 10.1039/d0nj03684f] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The photocatalytic degradation of phenol through -s-PANI@g-C3N4 and its nanocomposites with graphene.
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Affiliation(s)
- Asim Jilani
- Center of Nanotechnology
- King Abdulaziz University
- Jeddah
- Saudi Arabia
- Advanced Membrane Technology Research Centre
| | - Ghani Ur Rehman
- Advanced Membrane Technology Research Centre
- Universiti Teknologi Malaysia
- 81310 UTM Johor Bahru
- Malaysia
- School of Chemical and Energy Engineering
| | - Mohammad Omaish Ansari
- Center of Nanotechnology
- King Abdulaziz University
- Jeddah
- Saudi Arabia
- School of Chemical Engineering
| | - Mohd Hafiz Dzarfan Othman
- Advanced Membrane Technology Research Centre
- Universiti Teknologi Malaysia
- 81310 UTM Johor Bahru
- Malaysia
- School of Chemical and Energy Engineering
| | - Syed Zajif Hussain
- Department of Chemistry and Chemical engineering
- SBA School of Science & Engineering (SBASSE)
- Lahore University of Management Sciences (LUMS)
- Lahore 54792
- Pakistan
| | - Mohsin Raza Dustgeer
- Department of Environmental Sciences and Engineering
- Government College University Faisalabad
- Faisalabad
- Pakistan
| | - Reem Darwesh
- Physics Department
- Faculty of Science
- King Abdulaziz University
- Jeddah
- Saudi Arabia
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13
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Graphene Oxide Based Magnetic Nanocomposites with Polymers as Effective Bisphenol-A Nanoadsorbents. MATERIALS 2019; 12:ma12121987. [PMID: 31226816 PMCID: PMC6630715 DOI: 10.3390/ma12121987] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/12/2019] [Accepted: 06/17/2019] [Indexed: 12/21/2022]
Abstract
Magnetic graphene oxide was impregnated with polymers for the preparation of nanocomposite adsorbents to be examined for the adsorptive removal of a typical endocrine disruptor, bisphenol–A (BPA) from aqueous solutions. The polymers used were polystyrene, chitosan and polyaniline. The nanocomposites prepared were characterized for their structure, morphology and surface chemistry. The nanocomposites presented an increase adsorptive activity for BPA at ambient conditions, compared to pure magnetic oxide, attributed to the synergistic effect of the polymers and the magnetic graphene oxide. The increased adsorption of BPA exhibited by the nanocomposites with chitosan and polyaniline could be attributed to the contribution of amine groups.
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14
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Neelgund G, Oki A. Cobalt Phthalocyanine-Sensitized Graphene-ZnO Composite: An Efficient Near-Infrared-Active Photothermal Agent. ACS OMEGA 2019; 4:5696-5704. [PMID: 30949619 PMCID: PMC6441945 DOI: 10.1021/acsomega.8b03222] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 03/05/2019] [Indexed: 05/07/2023]
Abstract
Herein, a promising near-infrared-responsive photothermal agent was designed by anchoring of rice grain-shaped ZnO particles over graphene (GR) nanosheets and subsequent sensitization with cobalt phthalocyanine (CoPc). Thus, produced GR-ZnO-CoPc was able to attain the temperature of 68 °C by irradiating to 980 nm laser for 7 min, which is extremely higher than the endurance temperature of cancer cells. The linear fashioned progression in the photothermal effect of GR nanosheets was conquered by immobilization of ZnO particles and successive sensitization with CoPc. The excellence found in the photothermal effect of GR-ZnO-CoPc was verified by estimation of its photothermal conversion efficiency. The photothermal conversion efficiency assessed for GR-ZnO-CoPc was higher than those for the popular gold- and CuS-based photothermal agents. In addition, it possessed significant stability against photobleaching and structural rupture. It was found that the photothermal effect of GR-ZnO-CoPc is proportional to its concentration. However, by replacement of a 980 nm laser system with 808 nm, the photothermal effect of GR-ZnO-CoPc was reduced, which could be due to lower absorption of GR-ZnO-CoPc at 808 nm compared to 980 nm. On account of its significance and important properties, GR-ZnO-CoPc could be an interesting photothermal agent to employ in future photothermal therapy for cancer.
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Affiliation(s)
- Gururaj
M. Neelgund
- Department of Chemistry, Prairie View A&M University, Prairie View, Texas 77446, United States
| | - Aderemi Oki
- Department of Chemistry, Prairie View A&M University, Prairie View, Texas 77446, United States
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15
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Mitra M, Ahamed ST, Ghosh A, Mondal A, Kargupta K, Ganguly S, Banerjee D. Polyaniline/Reduced Graphene Oxide Composite-Enhanced Visible-Light-Driven Photocatalytic Activity for the Degradation of Organic Dyes. ACS OMEGA 2019; 4:1623-1635. [PMID: 31459420 PMCID: PMC6649179 DOI: 10.1021/acsomega.8b02941] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 01/09/2019] [Indexed: 05/10/2023]
Abstract
Creation of an innovative composite photocatalyst, to advance its performance, has attracted researchers to the field of photocatalysis. In this article, a new photocatalyst based on polyaniline/reduced graphene oxide (PANI/RGO) composites has been prepared via the in situ oxidative polymerization method employing RGO as a template. For thermoelectric applications, though a higher percentage (50 wt %) of RGO has been used, for photocatalytic activity, lesser percentages (2, 5, and 8 wt %) of RGO in the composite have given a significant outcome. Furthermore, photoluminescence (PL) spectra, time-resolved fluorescence spectra, and Brunauer-Emmett-Teller surface area analyses confirmed the improved photocatalytic mechanism. PANI/RGO composites under visible light irradiation exhibit amazingly improved activity toward the degradation of cationic and anionic dyes in comparison with pristine PANI or RGO. Here, a PANI/RGO composite, with 5 wt % RGO(PG2), has emerged as the best combination with the degradation percentages of 99.68, 99.35, and 98.73 for malachite green, rhodamine B, and congo red within 15, 30, and 40 min, respectively. Experimental findings show that the introduction of RGO can relieve the agglomeration of PANI nanoparticles and enhance the light absorption of the materials due to an increased surface area. Moreover, the PG2 composite also showed excellent photocatalytic activity to reduce noxious Cr(VI). The effective removal of Cr(VI) up to 94.7% at pH 2 was observed within only 15 min. With the help of the active species trapping experiment, a plausible mechanism for the photocatalytic degradation has been proposed. The heightened activity of the as-synthesized composite compared to that of neat PANI or RGO was generally because of high concentrations of •OH radicals and partly of •O2 - and holes (h+) as concluded from the nitroblue tetrazolium probe test and photoluminescence experiment. It is hoped that the exceptional photocatalytic performance of our work makes the conducting polymer-based composite an effective alternative in wastewater treatment for industrial applications.
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Affiliation(s)
- Mousumi Mitra
- Department
of Physics and Department of Chemistry, Indian Institute
of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India
| | - Sk. Taheruddin Ahamed
- Department
of Physics and Department of Chemistry, Indian Institute
of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India
| | - Amrita Ghosh
- Department
of Physics and Department of Chemistry, Indian Institute
of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India
| | - Anup Mondal
- Department
of Physics and Department of Chemistry, Indian Institute
of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India
- E-mail: . Phone: +91 7044369052 (A.M.)
| | - Kajari Kargupta
- Department
of Chemical Engineering, Jadavpur University, Kolkata 700032, India
| | - Saibal Ganguly
- Department
of Chemical Engineering, BITS Pilani, K K Birla Goa Campus, Zuarinagar, Sancoale 403726, Goa, India
| | - Dipali Banerjee
- Department
of Physics and Department of Chemistry, Indian Institute
of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India
- E-mail: . Phone: +91 9830299253 (D.B.)
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Kong P, Liu P, Ge Z, Tan H, Pei L, Wang J, Zhu P, Gu X, Zheng Z, Li Z. Conjugated HCl-doped polyaniline for photocatalytic oxidative coupling of amines under visible light. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02280a] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conjugated HCl-doped polyaniline acted as an efficient visible light-responsive nonmetal photocatalyst for imine green synthesis.
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Zhao X, Huang S, Liu Y, Liu Q, Zhang Y. In situ preparation of highly stable polyaniline/W 18O 49 hybrid nanocomposite as efficient visible light photocatalyst for aqueous Cr(VI) reduction. JOURNAL OF HAZARDOUS MATERIALS 2018; 353:466-475. [PMID: 29705660 DOI: 10.1016/j.jhazmat.2018.04.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 03/22/2018] [Accepted: 04/02/2018] [Indexed: 06/08/2023]
Abstract
In the present study, we prepared novel polyaniline supported W18O49 (PANI/W18O49) nanocomposite by in situ oxidative polymerisation method. We herein focused on enhancing the stability and the photocatalytic performance of W18O49. The prepared PANI/W18O49 was thoroughly characterized by FTIR, TEM, XRD, BET, UV-vis DRS and PL. The PANI support presented a great effect on the light harvesting and photo-charge transfer of the W18O49, and the optimum percentage of was found to be 10 wt%. As for treating Cr(VI), the effect of important water quality parameters (such as pH, ions, NOM, DO, temperature and SOAs) on photocatalytic performance was investigated under the visible light irradiation (λ > 420 nm). SOAs were shown to exert a dramatic accelerating influence on Cr(VI) reduction in the system. The obtained 10%-PANI/W18O49 can completely catalytically reduce 1 mM Cr(VI) in the presence of tartaric acid (1:3) within 50 min. Meanwhile, it can be recycled at ten times without any loss of photocatalytic efficiency, indicating the high stability of the as-prepared photocatalyst. The results of the study demonstrate the potential of the new obtained photocatalyst in efficient utilization of solar energy for treating aqueous Cr(VI).
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Affiliation(s)
- Xuesong Zhao
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China; Guangdong Ecological Environment Control Engineering Technology Research Center, PR China
| | - Shaobin Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China; Guangdong Ecological Environment Control Engineering Technology Research Center, PR China.
| | - Ying Liu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China; Guangdong Ecological Environment Control Engineering Technology Research Center, PR China
| | - Qianyu Liu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China; Guangdong Ecological Environment Control Engineering Technology Research Center, PR China
| | - Yongqing Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China; Guangdong Ecological Environment Control Engineering Technology Research Center, PR China
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Gonçalves RV, Zanini ML, Malmonge JA, Bonnaud L, Basso NRDS. Cashew nut shell liquid, a valuable raw material for generating semiconductive polyaniline nanofibers. POLIMEROS 2018. [DOI: 10.1590/0104-1428.01417] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Neelgund GM, Oki A. Photothermal effect: an important aspect for the enhancement of photocatalytic activity under illumination by NIR radiation. MATERIALS CHEMISTRY FRONTIERS 2018; 2:64-75. [PMID: 31263562 PMCID: PMC6601625 DOI: 10.1039/c7qm00337d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
A key auxiliary role of photothermal effect (PTE) in the enhancement of photocatalytic activity under illumination to near-infrared (NIR) radiations has been experimentally revealed. It was found that the photoexcitation of electrons, required for the process of photocatalysis does not occur in presence of NIR radiations alone without the support of both UV and visible radiations. Herein, a binary heterogeneous nanophotocatalyst, GR-ZnO was fabricated by a novel approach using hydrothermal process. In which ZnO nanotrapezoids were deposited over the surfaces of graphene nanosheets. In the reported unique approach, reduction of graphene oxide to graphene has been accomplished using water by an entirely alternative mechanism compared to traditional reduction processes those employ the hazardous reducing agents. Thus produced GR-ZnO photocatalyst has exhibited the excellence in rapid degradation of industrially voluntarily employing perilous dye, methyl orange. It is explored that PTE is mainly responsible for the rapid degradation of methyl orange transpired under illumination to NIR laser. Further, it has been established that PTE could not emerge with NIR radiations alone without the support of both UV and visible radiations. In consideration of its importance, PTE of GR-ZnO nanocatalyst has been revealed and compared with its individual components, viz., graphene and ZnO. Moreover, the photothermal conversion efficiency of GR-ZnO nanocatalyst was evaluated. Overall, the excellent catalytic activity found in GR-ZnO nanocatalyst was accounted for its decreased band gap, transpired by hybridization of ZnO with graphene could efficiently prevent the recombination of photo-generated charge carriers. In addition, admired catalytic activity of GR-ZnO nanocatalyst was attributed to improved optical absorption and enhancement in the adsorption affinity to methyl orange molecules.
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Affiliation(s)
- Gururaj M. Neelgund
- Department of Chemistry, Prairie View A&M University, Prairie View,
TX 77446, USA
| | - Aderemi Oki
- Department of Chemistry, Prairie View A&M University, Prairie View,
TX 77446, USA
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Neelgund G, Oki A. Graphene-Coupled ZnO: A Robust NIR-Induced Catalyst for Rapid Photo-Oxidation of Cyanide. ACS OMEGA 2017; 2:9095-9102. [PMID: 29302633 PMCID: PMC5748272 DOI: 10.1021/acsomega.7b01398] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 11/24/2017] [Indexed: 05/03/2023]
Abstract
Herein, we report the modulation of ZnO for enhancement of its ability toward plasmonic absorption of near-infrared (NIR) photons through coupling of graphene (GR). The reported modification led GR-ZnO to be a promising photocatalyst by the complete removal of poisonous and nonvolatile potassium cyanide from water. The photocatalytic degradation of cyanide was revealed by exposing it to NIR laser and comparing with the rate of UV, visible, and sunlight using their apparent reaction rate constants derived from the Langmuir-Hinshelwood model. The heteronanostructured GR-ZnO promoted rapid photo-oxidation of cyanide under illumination with NIR laser rather than UV, visible, and sunlight. It was assessed that the photothermal effect (PTE) is the main cause for higher catalytic efficiency of GR-ZnO in the presence of NIR radiations. Except for the NIR radiations, GR-ZnO does not show any indication of PTE by irradiating with UV, visible, or sunlight. On account of its significance, the PTE of GR-ZnO in KCN solution was evaluated and compared with its individual components viz., GR and ZnO upon exposure to a 980 nm laser system. Furthermore, it has been revealed that the PTE of GR-ZnO was proportional to its concentration. In addition to its effectiveness in the degradation of cyanide, GR-ZnO retained its special structure and exhibited an outstanding photostability after its repeated use in three successive cycles.
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Affiliation(s)
- Gururaj
M. Neelgund
- Department of Chemistry, Prairie
View A&M University, Prairie
View, Texas 77446, United States
| | - Aderemi Oki
- Department of Chemistry, Prairie
View A&M University, Prairie
View, Texas 77446, United States
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21
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Park J. Visible and near infrared light active photocatalysis based on conjugated polymers. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2017.03.022] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Neelgund GM, Oki AR. Influence of carbon nanotubes and graphene nanosheets on photothermal effect of hydroxyapatite. J Colloid Interface Sci 2016; 484:135-145. [PMID: 27599382 DOI: 10.1016/j.jcis.2016.07.078] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/26/2016] [Accepted: 07/28/2016] [Indexed: 01/14/2023]
Abstract
Herein we present a successful strategy for enhancement of photothermal efficiency of hydroxyapatite (HAP) by its conjugation with carbon nanotubes (CNTs) and graphene nanosheets (GR). Owing to excellent biocompatibility with human body and its non-toxicity, implementation of HAP based nanomaterials in photothermal therapy (PTT) provides non-replaceable benefits over PTE agents. Therefore, in this report, it has been experimentally exploited that the photothermal effect (PTE) of HAP has significantly improved by its assembly with CNTs and GR. It is found that the type of carbon nanomaterial used to conjugate with HAP has influence on its PTE in such a way that the photothermal efficiency of GR-HAP was higher than CNTs-COOH-HAP under exposure to 980nm near-infrared (NIR) laser. The temperature attained by aqueous dispersions of both CNTs-COOH-HAP and GR-HAP after illuminating to NIR radiations for 7min was found to be above 50°C, which is beyond the temperature tolerance of cancer cells. So that the rise in temperature shown by both CNTs-COOH-HAP and GR-HAP is enough to induce the death of tumoral or cancerous cells. Overall, this approach in modality of HAP with CNTs and GR provide a great potential for development of future nontoxic PTE agents.
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Affiliation(s)
- Gururaj M Neelgund
- Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA
| | - Aderemi R Oki
- Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA.
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Carbon-based H2-production photocatalytic materials. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2016. [DOI: 10.1016/j.jphotochemrev.2016.04.002] [Citation(s) in RCA: 209] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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