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Kaushik R, Singh PK, Halder A. Modulation strategies in titania photocatalyst for energy recovery and environmental remediation. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.07.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Chen Y, Wang Q, Kou J, Lu C, Xu Z. Efficient photocatalytic H 2production realized by Mn xCd 1-xSe In situheterojunction. NANOTECHNOLOGY 2021; 32:365602. [PMID: 34087815 DOI: 10.1088/1361-6528/ac084e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/03/2021] [Indexed: 05/19/2023]
Abstract
Fast recombination of photoinduced carriers inhibits the performance of photocatalysts. By constructing heterojunctions, built-in electric fields can be formed to separate electrons and holes and finally enhance the photocatalytic efficiency. Herein, a MnxCd1-xSein situheterojunction was fabricated by a facile solvothermal method to draw upon this advantage. Absorption spectra show that the light absorption of CdSe raises up obviously after the doping of Mn2+. Best performance was achieved when the doping percent of Mn2+was 50%. This Mn0.5Cd0.5Se sample exhibits a 7.2 folds increase in hydrogen evolution against pure CdSe owing to the fast electron transportation. Moreover, it proves well stability in an 18 h cycling test and gains a 6.7% apparent quantum yield under 420 nm light. In summary, this work constructs anin situheterojunction to enhance the photocatalytic hydrogen evolution efficiency and sheds light on a feasible way for the application of photocatalysis.
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Affiliation(s)
- Yukai Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Qian Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Jiahui Kou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Chunhua Lu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Zhongzi Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, People's Republic of China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, People's Republic of China
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Deimling M, Kousik SR, Abitaev K, Frey W, Sottmann T, Koynov K, Laschat S, Atanasova P. Hierarchical Silica Inverse Opals as a Catalyst Support for Asymmetric Molecular Heterogeneous Catalysis with Chiral Rh‐diene Complexes. ChemCatChem 2021. [DOI: 10.1002/cctc.202001997] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Max Deimling
- Institute of Organic Chemistry University of Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Shravan R. Kousik
- Institute for Materials Science University of Stuttgart Heisenbergstraße 3 70569 Stuttgart Germany
| | - Karina Abitaev
- Institute of Physical Chemistry University of Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Institute of Organic Chemistry University of Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Thomas Sottmann
- Institute of Physical Chemistry University of Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Kaloian Koynov
- Max-Planck-Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
| | - Sabine Laschat
- Institute of Organic Chemistry University of Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Petia Atanasova
- Institute for Materials Science University of Stuttgart Heisenbergstraße 3 70569 Stuttgart Germany
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Enhanced Photodegradation of p-Nitrobenzoic Acid by Binary Mixtures with Ba 2+/TiO 2 and MCM-41. MATERIALS 2021; 14:ma14092404. [PMID: 34063100 PMCID: PMC8125084 DOI: 10.3390/ma14092404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/22/2021] [Accepted: 04/29/2021] [Indexed: 11/16/2022]
Abstract
A novel Ba(II)/TiO2-MCM-41 composite was synthesized using binary mixtures with Ba2+/TiO2 and MCM-41, and Ba2+ as a doping ion of TiO2. The specific surface area and pore structure characterizations confirm that a mesoporous structure with a surface area of 341.2 m2/g and a narrow pore size distribution ranging from 2 to 4 nm was achieved using Ba(II)/TiO2-MCM-41. Ba(II)/TiO2 particles were synthesized into 10-15 nm particles and were well dispersed onto MCM-41. The diffraction peaks in the XRD patterns of TiO2-MCM-41 and Ba(II)/TiO2-MCM-41 were all attributed to anatase TiO2. By taking advantage of MCM-41 and Ba2+, the photocatalytic performance of Ba(II)/TiO2-MCM-41 was remarkably enhanced by suppressing its rutile phase, by lowering the band gap energy, and by facilitating the dispersion of TiO2. Therefore, the photodegradation efficiencies of p-nitrobenzoic acid (4 × 10-4 mol/L) by various photocatalysts (60 min) under UV light irradiation are arranged in the following order: Ba(II)/TiO2-MCM-41 (91.7%) > P25 (86.3%) > TiO2-MCM-41 (80.6%) > Ba(II)/TiO2 (55.7%) > TiO2 (53.9%). The Ba(II)/TiO2-MCM-41 composite was reused for five cycles and maintained a high catalytic activity (73%).
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Kousik SR, Sipp D, Abitaev K, Li Y, Sottmann T, Koynov K, Atanasova P. From Macro to Mesoporous ZnO Inverse Opals: Synthesis, Characterization and Tracer Diffusion Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:196. [PMID: 33466679 PMCID: PMC7828802 DOI: 10.3390/nano11010196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 11/16/2022]
Abstract
Oxide inverse opals (IOs) with their high surface area and open porosity are promising candidates for catalyst support applications. Supports with confined mesoporous domains are of added value to heterogeneous catalysis. However, the fabrication of IOs with mesoporous or sub-macroporous voids (<100 nm) continues to be a challenge, and the diffusion of tracers in quasi-mesoporous IOs is yet to be adequately studied. In order to address these two problems, we synthesized ZnO IOs films with tunable pore sizes using chemical bath deposition and template-based approach. By decreasing the size of polystyrene (PS) template particles towards the mesoporous range, ZnO IOs with 50 nm-sized pores and open porosity were synthesized. The effect of the template-removal method on the pore geometry (spherical vs. gyroidal) was studied. The infiltration depth in the template was determined, and the factors influencing infiltration were assessed. The crystallinity and photonic stop-band of the IOs were studied using X-Ray diffraction and UV-Vis, respectively. The infiltration of tracer molecules (Alexa Fluor 488) in multilayered quasi-mesoporous ZnO IOs was confirmed via confocal laser scanning microscopy, while fluorescence correlation spectroscopy analysis revealed two distinct diffusion times in IOs assigned to diffusion through the pores (fast) and adsorption on the pore walls (slow).
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Affiliation(s)
- Shravan R. Kousik
- Institute for Materials Science, University of Stuttgart, 70569 Stuttgart, Germany; (S.R.K.); (D.S.); (Y.L.)
| | - Diane Sipp
- Institute for Materials Science, University of Stuttgart, 70569 Stuttgart, Germany; (S.R.K.); (D.S.); (Y.L.)
| | - Karina Abitaev
- Institute of Physical Chemistry, University of Stuttgart, 70569 Stuttgart, Germany; (K.A.); (T.S.)
| | - Yawen Li
- Institute for Materials Science, University of Stuttgart, 70569 Stuttgart, Germany; (S.R.K.); (D.S.); (Y.L.)
| | - Thomas Sottmann
- Institute of Physical Chemistry, University of Stuttgart, 70569 Stuttgart, Germany; (K.A.); (T.S.)
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Petia Atanasova
- Institute for Materials Science, University of Stuttgart, 70569 Stuttgart, Germany; (S.R.K.); (D.S.); (Y.L.)
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Lv C, Lan X, Wang L, Wang C, Liu X, Shi J. Hierarchical Pores Structured Inverse Opal‐TiO
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for Photocatalytic Tetracycline Elimination‐Testing by Real‐Time Monitor of Germination Rate and Growth Rate of Chinese Cabbage. ChemistrySelect 2020. [DOI: 10.1002/slct.202003183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Chao Lv
- Qingdao Agricultural University Department of Chemistry and Pharmacy Chengyang District, Qingdao China
| | - Xuefang Lan
- Qingdao Agricultural University Department of Chemistry and Pharmacy Chengyang District, Qingdao China
| | - Lili Wang
- Qingdao Agricultural University Department of Chemistry and Pharmacy Chengyang District, Qingdao China
| | - Cheng Wang
- Qingdao Agricultural University Department of Chemistry and Pharmacy Chengyang District, Qingdao China
| | - Xiaogang Liu
- Qingdao Agricultural University Department of Chemistry and Pharmacy Chengyang District, Qingdao China
| | - Jinsheng Shi
- Qingdao Agricultural University Department of Chemistry and Pharmacy Chengyang District, Qingdao China
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