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Ji T, Wu D, Zhang X, Zhao Y, Xu K. The TiO 2 films with sandwich-type polyoxometalates in dye sensitized solar cells with electron recombination decreasing and dye adsorption increasing. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2057848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Tuo Ji
- Department of Vascular Surgery, China-Japan Union Hospital Jilin University, Changchun, Jilin, China
| | - Di Wu
- Department of Vascular Surgery, China-Japan Union Hospital Jilin University, Changchun, Jilin, China
| | - Xiaowen Zhang
- Department of Vascular Surgery, China-Japan Union Hospital Jilin University, Changchun, Jilin, China
| | - Yue Zhao
- Department of Vascular Surgery, China-Japan Union Hospital Jilin University, Changchun, Jilin, China
| | - Kaicheng Xu
- Department of Anesthesiology, China-Japan Union Hospital Jilin University, Changchun, Jilin, China
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2
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Chen L, Hong J, Butt HJ, Wooh S. Liquid-Repellent Metal Oxide Photocatalysts. Chemistry 2019; 25:4535-4542. [PMID: 30381860 DOI: 10.1002/chem.201804411] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/28/2018] [Indexed: 12/21/2022]
Abstract
Metal oxide photocatalysts (MOPCs) decompose organic molecules under illumination. However, the application of MOPCs in industry and research is currently limited by their intrinsic hydrophilicity because MOPCs can be wetted by most liquids. To achieve liquid repellency, the surface needs to possess a low surface energy, but most organic molecules with low surface energy are degraded by photocatalytic activity. Herein, current methods to achieve liquid repellency on MOPCs, while preventing degradation of hydrophobic coatings, are reviewed. Classically, composite materials containing MOPCs and hydrophobic organic compounds possess good liquid repellency. However, composites normally form irregular coatings and are hard to prepare on surfaces such as those that are mesoporous or nanostructured. In addition, the adhesion of composites to substrates is often weak, resulting in delamination. Recent studies have shown that the direct grafting reaction of polydimethylsiloxane (PDMS) from silicone oil (methyl-terminated PDMS) under illumination results in a stable polymer brush. This easy and simple grafting method allows us to create stable liquid-repellent surfaces on MOPCs of various types, structures, and sizes. In particular, super-liquid-repellent drops with an underlying air layer can be created on PDMS-grafted nano-/microstructured MOPCs. Potential applications of surfaces combining liquid repellency and photocatalytic activity are also discussed; thus offering new ways of using MOPCs in a wider range of applications.
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Affiliation(s)
- Liwei Chen
- School of Chemical Engineering & Materials Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Jinkee Hong
- Department of Chemical & Biomolecular Engineering, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea
| | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Sanghyuk Wooh
- School of Chemical Engineering & Materials Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
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3
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Ren B, Wang T, Qu G, Deng F, Liang D, Yang W, Liu M. In situ synthesis of g-C 3N 4/TiO 2 heterojunction nanocomposites as a highly active photocatalyst for the degradation of Orange II under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:19122-19133. [PMID: 29725923 DOI: 10.1007/s11356-018-2114-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
As a highly active photocatalyst, g-C3N4/TiO2 heterojunction nanocomposites were in situ synthesized by simple ultrasonic mixing and calcination by using TiO2 and melamine as precursors. The morphology and structure of the prepared photocatalysts were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, UV-Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The photocatalytic activities of g-C3N4/TiO2 nanocomposites to degrade Orange II (AO7) under visible light irradiation were evaluated. Results showed that the photocatalytic rate of the prepared g-C3N4/TiO2 photocatalyst to degrade AO7 was about three times than that of pristine TiO2 and g-C3N4. The g-C3N4/TiO2 composite with a ratio of 1:4 had the highest degradation efficiency for AO7 solution. Its degradation efficiency under acidic conditions was significantly higher than that under alkaline conditions. The enhancement of photocatalytic activity can be attributed to the formation of heterojunctions between g-C3N4 and TiO2, which leads to rapid charge transfer and the efficient separation of photogenerated electron-hole pairs. The recycling experiment indicated that the photocatalyst of g-C3N4/TiO2 nanocomposites still maintained good photochemical stability and recyclability after five cycles; this finding was important for its practical applications. A series of free radical trapping experiments showed that •O2- played a crucial role in the degradation of AO7. Graphical Abstract ᅟ.
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Affiliation(s)
- Bin Ren
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Tiecheng Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, People's Republic of China
| | - Guangzhou Qu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, People's Republic of China.
| | - Fang Deng
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, Jiangxi, People's Republic of China
| | - Dongli Liang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, People's Republic of China
| | - Wenli Yang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Meishan Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
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Imae I, Tsukimori M, Fujimoto T, Tsukiyama K, Harima Y. Orientation control of anchored molecules on metal-oxide substrates. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Three-dimensional flower-like rutile TiO2 microsphere composed of nanorods: a potential material as light scattering layer for DSSCs. Chem Res Chin Univ 2017. [DOI: 10.1007/s40242-017-6363-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Cheema H, Delcamp JH. Harnessing Photovoltage: Effects of Film Thickness, TiO 2 Nanoparticle Size, MgO and Surface Capping with DSCs. ACS APPLIED MATERIALS & INTERFACES 2017; 9:3050-3059. [PMID: 28026928 DOI: 10.1021/acsami.6b11456] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
High photovoltage dye-sensitized solar cells (DSCs) offer an exceptional opportunity to power electrocatalysts for the production of hydrogen from water and the reduction of CO2 to usable fuels with a relatively cost-effective, low-toxicity solar cell. Competitive recombination pathways such as electron transfer from TiO2 films to the redox shuttle or oxidized dye must be minimized to achieve the maximum possible photovoltage (Voc) from DSC devices. A high Voc of 882 mV was achieved with the iodide/triiodide redox shuttle and a ruthenium NCS-ligated dye, HD-2-mono, by utilizing a combined approach of (1) modulating the TiO2 surface area through film thickness and nanoparticle size selection, (2) addition of a MgO insulating layer, and (3) capping available TiO2 film surface sites post film sensitization with an F-SAM (fluorinated self-assembled monolayer) treatment. The exceptional Voc of 882 mV observed is the highest achieved for the popular NCS containing ruthenium sensitizers with >5% PCE and compares favorably to the 769 mV value observed under common device preparation conditions.
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Affiliation(s)
- Hammad Cheema
- Chemistry Department, University of Mississippi , 481 Coulter Hall, University, Mississippi 38677, United States
| | - Jared H Delcamp
- Chemistry Department, University of Mississippi , 481 Coulter Hall, University, Mississippi 38677, United States
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Preparing hydrophobic nanocellulose-silica film by a facile one-pot method. Carbohydr Polym 2016; 153:266-274. [DOI: 10.1016/j.carbpol.2016.07.112] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 07/24/2016] [Accepted: 07/26/2016] [Indexed: 11/18/2022]
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Kim HJ, Kim JH, Durga IK, Punnoose D, Kundakarla N, Reddy AE, Rao SS. Densely packed zinc sulfide nanoparticles on TiO2 for hindering electron recombination in dye-sensitized solar cells. NEW J CHEM 2016. [DOI: 10.1039/c6nj02493a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A graphical diagram of DSSCs without and with ZnS as a compact layer on a TiO2 film.
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Affiliation(s)
- Hee-Je Kim
- School of Electrical Engineering
- Pusan National University
- Geumjeong-gu
- Republic of Korea
| | - Jeong-Hoon Kim
- School of Electrical Engineering
- Pusan National University
- Geumjeong-gu
- Republic of Korea
| | - Ikkurthi Kanaka Durga
- School of Electrical Engineering
- Pusan National University
- Geumjeong-gu
- Republic of Korea
| | - Dinah Punnoose
- School of Electrical Engineering
- Pusan National University
- Geumjeong-gu
- Republic of Korea
| | | | - Araveeti Eswar Reddy
- School of Electrical Engineering
- Pusan National University
- Geumjeong-gu
- Republic of Korea
| | - S. Srinivasa Rao
- School of Electrical Engineering
- Pusan National University
- Geumjeong-gu
- Republic of Korea
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