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Noble metal-based bimetallic alloy nanostructures became popular for methanol oxidation reaction (MOR) in order to lower the high cost of the Pt catalyst and improve the catalyst activity as well as their CO tolerance. Fabrication of the secondary structures of bimetallic alloy nanocrystal clusters is desired due to their abundant accessible active sites and enhanced stability. Herein, for the first time, we prepared novel Pt-Cu bimetallic alloy nanocrystal clusters (Pt-Cu BANCs) in the presence of poly(diallyldimethylammonium chloride) (PDDA). The selective use of PDDA and control of the amount of PDDA are critical to the controlled fabrication of secondary structures with nanograins assembled together. The Pt-Cu BANCs offered abundant active sites available and enhanced durable stability, and are investigated to be high-performance electrocatalysts for MOR (i.e. the ECSAs of Pt-Cu BANCs and the specific current density of methanol oxidation on Pt-Cu BANCs are 73.9 m2/g and 3.36 mA·cm-2, respectively), which are far better than those of commercial Pt/C and Pt black. Our results reported herein developed an effective strategy of polyelectrolyte-assisted soft reduced process for the creation of the secondary structures of bimetallic alloy nanocrystal clusters, which would be used as enhanced catalysts in the field of clean energy.
Rui Li; Shengnan Li; Yong Liu; Tsuyoshi Ochiai; Sanjay S. Latthe; Kazuya Nakata; Ruimin Xing; Shanhu Liu. Polyelectrolyte-assisted soft reduced process for Pt-Cu nanoclusters with enhanced electrocatalytic activity for the methanol oxidation reaction. Journal of Physics and Chemistry of Solids 2018, 124, 361 -366.
AMA StyleRui Li, Shengnan Li, Yong Liu, Tsuyoshi Ochiai, Sanjay S. Latthe, Kazuya Nakata, Ruimin Xing, Shanhu Liu. Polyelectrolyte-assisted soft reduced process for Pt-Cu nanoclusters with enhanced electrocatalytic activity for the methanol oxidation reaction. Journal of Physics and Chemistry of Solids. 2018; 124 ():361-366.
Chicago/Turabian StyleRui Li; Shengnan Li; Yong Liu; Tsuyoshi Ochiai; Sanjay S. Latthe; Kazuya Nakata; Ruimin Xing; Shanhu Liu. 2018. "Polyelectrolyte-assisted soft reduced process for Pt-Cu nanoclusters with enhanced electrocatalytic activity for the methanol oxidation reaction." Journal of Physics and Chemistry of Solids 124, no. : 361-366.
Ruimin Xing; Sanjay S. Latthe; A.K. Bhosale; Rui Li; A. Madhan Kumar; Shanhu Liu. A novel and facile approach to prepare self-cleaning yellow superhydrophobic polycarbonates. Journal of Molecular Liquids 2017, 247, 366 -373.
AMA StyleRuimin Xing, Sanjay S. Latthe, A.K. Bhosale, Rui Li, A. Madhan Kumar, Shanhu Liu. A novel and facile approach to prepare self-cleaning yellow superhydrophobic polycarbonates. Journal of Molecular Liquids. 2017; 247 ():366-373.
Chicago/Turabian StyleRuimin Xing; Sanjay S. Latthe; A.K. Bhosale; Rui Li; A. Madhan Kumar; Shanhu Liu. 2017. "A novel and facile approach to prepare self-cleaning yellow superhydrophobic polycarbonates." Journal of Molecular Liquids 247, no. : 366-373.
Popat G. Pawar; Ruimin Xing; Rahul C. Kambale; A. Madhan Kumar; Shanhu Liu; Sanjay S. Latthe. Polystyrene assisted superhydrophobic silica coatings with surface protection and self-cleaning approach. Progress in Organic Coatings 2017, 105, 235 -244.
AMA StylePopat G. Pawar, Ruimin Xing, Rahul C. Kambale, A. Madhan Kumar, Shanhu Liu, Sanjay S. Latthe. Polystyrene assisted superhydrophobic silica coatings with surface protection and self-cleaning approach. Progress in Organic Coatings. 2017; 105 ():235-244.
Chicago/Turabian StylePopat G. Pawar; Ruimin Xing; Rahul C. Kambale; A. Madhan Kumar; Shanhu Liu; Sanjay S. Latthe. 2017. "Polystyrene assisted superhydrophobic silica coatings with surface protection and self-cleaning approach." Progress in Organic Coatings 105, no. : 235-244.
Shanhu Liu; Sanjay S. Latthe; Haitang Yang; Baoshun Liu; Ruimin Xing. Raspberry-like superhydrophobic silica coatings with self-cleaning properties. Ceramics International 2015, 41, 11719 -11725.
AMA StyleShanhu Liu, Sanjay S. Latthe, Haitang Yang, Baoshun Liu, Ruimin Xing. Raspberry-like superhydrophobic silica coatings with self-cleaning properties. Ceramics International. 2015; 41 (9):11719-11725.
Chicago/Turabian StyleShanhu Liu; Sanjay S. Latthe; Haitang Yang; Baoshun Liu; Ruimin Xing. 2015. "Raspberry-like superhydrophobic silica coatings with self-cleaning properties." Ceramics International 41, no. 9: 11719-11725.
A magnetic PU sponge displays superhydrophobicity/superoleophilicity, and more favorably possesses magnetic responsiveness and superior stability against corrosive solutions, showing great potential in practical oily wastewater treatment.
Shanhu Liu; Qingfeng Xu; Sanjay S. Latthe; Annaso Gurav; Ruimin Xing. Superhydrophobic/superoleophilic magnetic polyurethane sponge for oil/water separation. RSC Advances 2015, 5, 68293 -68298.
AMA StyleShanhu Liu, Qingfeng Xu, Sanjay S. Latthe, Annaso Gurav, Ruimin Xing. Superhydrophobic/superoleophilic magnetic polyurethane sponge for oil/water separation. RSC Advances. 2015; 5 (84):68293-68298.
Chicago/Turabian StyleShanhu Liu; Qingfeng Xu; Sanjay S. Latthe; Annaso Gurav; Ruimin Xing. 2015. "Superhydrophobic/superoleophilic magnetic polyurethane sponge for oil/water separation." RSC Advances 5, no. 84: 68293-68298.
The pocket-sized nebulizer equipped jet-spray coating of a monoclinic CuO crystallite surface showed excellent superhydrophobic self-cleaning properties owing to its compact crystallite texture and high surface roughness.
Sanjay Subhash Latthe; P. Sudhagar; C. Ravi Dhas; A. Jennifer Christy; D. David Kirubakaran; R. Venkatesh; Anitha Devadoss; Chiaki Terashima; Kazuya Nakata; Akira Fujishima. Self-cleaning and superhydrophobic CuO coating by jet-nebulizer spray pyrolysis technique. CrystEngComm 2015, 17, 2624 -2628.
AMA StyleSanjay Subhash Latthe, P. Sudhagar, C. Ravi Dhas, A. Jennifer Christy, D. David Kirubakaran, R. Venkatesh, Anitha Devadoss, Chiaki Terashima, Kazuya Nakata, Akira Fujishima. Self-cleaning and superhydrophobic CuO coating by jet-nebulizer spray pyrolysis technique. CrystEngComm. 2015; 17 (13):2624-2628.
Chicago/Turabian StyleSanjay Subhash Latthe; P. Sudhagar; C. Ravi Dhas; A. Jennifer Christy; D. David Kirubakaran; R. Venkatesh; Anitha Devadoss; Chiaki Terashima; Kazuya Nakata; Akira Fujishima. 2015. "Self-cleaning and superhydrophobic CuO coating by jet-nebulizer spray pyrolysis technique." CrystEngComm 17, no. 13: 2624-2628.
Photocatalytic TiO2 coatings are famously known for their excellent self-cleaning behavior, where very thin water layer formed on the superhydrophilic surface can easily wash-off the dirt particles while flowing. Here we report the preparation of the optically transparent, adherent, highly wettable towards water and photocatalytic SiO2-TiO2 coatings on polycarbonate (PC) substrate for self-cleaning applications. The silica barrier layer was applied on UV-treated PC substrate before spin coating the SiO2-TiO2 coatings. The effect of different vol% of SiO2 in TiO2 and its influence on the surface morphology, mechanical stability, wettability, and photocatalytic properties of the coatings were studied in detail. The coatings prepared from 7 vol% of SiO2 in TiO2 showed smooth, crack-free surface morphology and low surface roughness compared to the coatings prepared from the higher vol% of SiO2 in TiO2. The water drops on this coating acquires a contact angle less than 10° after UV irradiation for 30 min. All the coatings prepared from different vol% (7 to 20) of SiO2 in TiO2 showed high transparency in the visible range.
Sanjay S. Latthe; Shanhu Liu; Chiaki Terashima; Kazuya Nakata; Akira Fujishima. Transparent, Adherent, and Photocatalytic SiO2-TiO2 Coatings on Polycarbonate for Self-Cleaning Applications. Coatings 2014, 4, 497 -507.
AMA StyleSanjay S. Latthe, Shanhu Liu, Chiaki Terashima, Kazuya Nakata, Akira Fujishima. Transparent, Adherent, and Photocatalytic SiO2-TiO2 Coatings on Polycarbonate for Self-Cleaning Applications. Coatings. 2014; 4 (3):497-507.
Chicago/Turabian StyleSanjay S. Latthe; Shanhu Liu; Chiaki Terashima; Kazuya Nakata; Akira Fujishima. 2014. "Transparent, Adherent, and Photocatalytic SiO2-TiO2 Coatings on Polycarbonate for Self-Cleaning Applications." Coatings 4, no. 3: 497-507.
The formation of an air-column on a superhydrophobic surface: the superhydrophobic coating is surrounded by blue colored water forming an air column, and water acquires a height of nearly 5 mm around the boundaries of the superhydrophobic coating. This confirms that the superhydrophobic surface strongly repels water and always remains dry.
Sanjay S. Latthe; Chiaki Terashima; Kazuya Nakata; Munetoshi Sakai; Akira Fujishima. Development of sol–gel processed semi-transparent and self-cleaning superhydrophobic coatings. Journal of Materials Chemistry A 2014, 2, 5548 -5553.
AMA StyleSanjay S. Latthe, Chiaki Terashima, Kazuya Nakata, Munetoshi Sakai, Akira Fujishima. Development of sol–gel processed semi-transparent and self-cleaning superhydrophobic coatings. Journal of Materials Chemistry A. 2014; 2 (15):5548-5553.
Chicago/Turabian StyleSanjay S. Latthe; Chiaki Terashima; Kazuya Nakata; Munetoshi Sakai; Akira Fujishima. 2014. "Development of sol–gel processed semi-transparent and self-cleaning superhydrophobic coatings." Journal of Materials Chemistry A 2, no. 15: 5548-5553.
In nature, numerous biological surfaces depict hierarchical micro- and nano-structures with low energy surfaces that offer the superhydrophobic properties with low water adhesion. The superhydrophobic coatings were prepared using sol–gel derived SiO2 micro-particles by spray method. A methyltrimethoxysilane (MTMS) was used as a sol–gel precursor to prepare a coating sol. The entire spray coating process is a single-step and takes place at 70 °C temperatures. The surface morphological studies showed that the size of SiO2 particles were between 8 and 14 μm in diameter. These different diameter SiO2 micro-particles form hierarchical micro-structure which facilitates to reduce solid/water interface. The prepared superhydrophobic coatings showed static water contact angle (θ) of 162° ± 2° and roll-off angle of 6° ± 1°. The wetting properties and surface morphology of the coatings were investigated by static and dynamic water contact angle measurements and scanning electron microscopy, respectively. The characterization of the coatings by Atomic Force Microscopy and Fourier transformation infrared spectroscopy was also made. The resulting hierarchical surface morphology can be easily tuned over large areas by simple spray method.
Sanjay S. Latthe; A. Venkateswara Rao. Superhydrophobic SiO2 micro-particle coatings by spray method. Surface and Coatings Technology 2012, 207, 489 -492.
AMA StyleSanjay S. Latthe, A. Venkateswara Rao. Superhydrophobic SiO2 micro-particle coatings by spray method. Surface and Coatings Technology. 2012; 207 ():489-492.
Chicago/Turabian StyleSanjay S. Latthe; A. Venkateswara Rao. 2012. "Superhydrophobic SiO2 micro-particle coatings by spray method." Surface and Coatings Technology 207, no. : 489-492.
A. Venkateswara Rao; Sanjay S. Latthe; Satish Mahadik; Charles Kappenstein. Mechanically stable and corrosion resistant superhydrophobic sol–gel coatings on copper substrate. Applied Surface Science 2011, 257, 5772 -5776.
AMA StyleA. Venkateswara Rao, Sanjay S. Latthe, Satish Mahadik, Charles Kappenstein. Mechanically stable and corrosion resistant superhydrophobic sol–gel coatings on copper substrate. Applied Surface Science. 2011; 257 (13):5772-5776.
Chicago/Turabian StyleA. Venkateswara Rao; Sanjay S. Latthe; Satish Mahadik; Charles Kappenstein. 2011. "Mechanically stable and corrosion resistant superhydrophobic sol–gel coatings on copper substrate." Applied Surface Science 257, no. 13: 5772-5776.
Sunetra L. Dhere; Uzma K.H. Bangi; Sanjay S. Latthe; A. Venkateswara Rao. Enhancement in hydrophobicity of silica films using metal acetylacetonate and heat treatment. Journal of Physics and Chemistry of Solids 2010, 72, 45 -49.
AMA StyleSunetra L. Dhere, Uzma K.H. Bangi, Sanjay S. Latthe, A. Venkateswara Rao. Enhancement in hydrophobicity of silica films using metal acetylacetonate and heat treatment. Journal of Physics and Chemistry of Solids. 2010; 72 (1):45-49.
Chicago/Turabian StyleSunetra L. Dhere; Uzma K.H. Bangi; Sanjay S. Latthe; A. Venkateswara Rao. 2010. "Enhancement in hydrophobicity of silica films using metal acetylacetonate and heat treatment." Journal of Physics and Chemistry of Solids 72, no. 1: 45-49.
Wettability of solid surfaces is a crucial concern in our daily life as well as in engineering and science. The present research work describes the room temperature (27 °C) synthesis of adherent and water repellent silica films on glass substrates using vinyltrimethoxysilane (VTMS) as a hydrophobic reagent by a single step sol–gel process. The silica sol was prepared by keeping the molar ratio of tetraethoxysilane (TEOS), methanol (MeOH), water (H2O) constant at 1:14.69:5, respectively, with 0.01 M NH4F throughout the experiments and the VTMS/TEOS molar ratio (M) was varied from 0 to 0.97. The effects of M on the surface structure and hydrophobicity have been researched. The static water contact angle as high as 144° and water sliding angle as low as 14° was obtained for silica film prepared from M = 0.97. The hydrophobic silica films retained their hydrophobicity up to a temperature of 255 °C and above this temperature the films became superhydrophilic. The prepared silica films were characterized by Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Fourier Transform Infrared (FT-IR) spectroscopy, humidity test and static and dynamic water contact angle measurements.
Sanjay S. Latthe; Hiroaki Imai; V. Ganesan; A. Venkateswara Rao. Ultrahydrophobic silica films by sol–gel process. Journal of Porous Materials 2009, 17, 565 -571.
AMA StyleSanjay S. Latthe, Hiroaki Imai, V. Ganesan, A. Venkateswara Rao. Ultrahydrophobic silica films by sol–gel process. Journal of Porous Materials. 2009; 17 (5):565-571.
Chicago/Turabian StyleSanjay S. Latthe; Hiroaki Imai; V. Ganesan; A. Venkateswara Rao. 2009. "Ultrahydrophobic silica films by sol–gel process." Journal of Porous Materials 17, no. 5: 565-571.