Interaction between molybdena and silica: FT-IR/PA studies of surface hydroxyl groups and pore structure assessment

1995 ◽  
Vol 94 (2-3) ◽  
pp. 267-277 ◽  
Author(s):  
Gamal M.S. El Shafei ◽  
M. M. Mokhtar
Keyword(s):  
Pore Structure ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups ◽  
Ft Ir ◽  
Structure Assessment

Synchronous pore structure and surface hydroxyl groups amelioration as an efficient route for promoting HCHO oxidation over Pt/ZSM-5

2018 ◽  
Vol 316 ◽  
pp. 107-113 ◽  
Author(s):  
Junjie Ding ◽  
Jiashu Chen ◽  
Zebao Rui ◽  
Yilang Liu ◽  
Pintian Lv ◽  
...  
Keyword(s):  
Pore Structure ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups ◽  
Efficient Route

Synthesis and Characterization of TiO2/ PSt/PVP Multilayer Core-Shell Hybrid Microspheres

2012 ◽  
Vol 512-515 ◽  
pp. 2443-2447 ◽  
Author(s):  
Li Ying Guo
Keyword(s):  
Decomposition Temperature ◽  
Tetrabutyl Titanate ◽  
Core Shell ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups ◽  
Ft Ir ◽  
Hydrolysis Of ◽  
Thermal Stability Of

Multiplayer core-shell TiO2/PSt/PVP hybrid microspheres were successfully synthesized by the copolymerization of vinylpyrrolidone in the solution of ethyl acetate with TiO2/PSt core-shell hybrid microspheres which were formed through the encapsulation of KH570-g-TiO2 sol particles with styrene, while the active KH570-g-TiO2 sol particles were prepared by the hydrolysis condensation of KH-570 with tetrabutyl titanate. Characterization technologies of FT-IR and TGA were applied to investigate the structure and the thermal stability of the product. The results showed that the hydroxyl groups from the hydrolysis of KH-570 condensed with the surface hydroxyl groups of TiO2, as well as PSt and PVP were grafted successively onto the surface of KH570-g-TiO2 sol particles. The thermal decomposition temperature of TiO2/PSt/PVP was higher than TiO2/PSt, which also indicated that the obtained product was the final objective product.

FT-IR and solid-state NMR investigation of surface hydroxyl groups on dealuminated ZSM-5

1994 ◽  
Vol 75 (1-4) ◽  
pp. 204-212 ◽  
Author(s):  
Aila Maijanen ◽  
Eric G. Derouane ◽  
Janos B. Nagy
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups ◽  
Ft Ir

The synthesis and structure of silica-supported bis(h5-cyclopentadienyl)dichlorotitanium(IV) complexes

1986 ◽  
Vol 51 (7) ◽  
pp. 1430-1438 ◽  
Author(s):  
Alena Reissová ◽  
Zdeněk Bastl ◽  
Martin Čapka
Keyword(s):  
Free Surface ◽  
Hydroxyl Groups ◽  
Titanium Complex ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups ◽  
Free Hydroxyl ◽  
Cyclopentadienyl Anion

The title complexes have been obtained by functionalization of silica with cyclopentadienylsilanes of the type Rx(CH3)3 - xSi(CH2)nC5H5 (x = 1-3, n = 0, 1, 3), trimethylsilylation of free surface hydroxyl groups, transformation of the bonded cyclopentadienyl group to the cyclopentadienyl anion, followed by coordination of (h5-cyclopentadienyl)trichlorotitanium. The effects of single steps of the above immobilization on texture of the support, the number of free hydroxyl groups, the coverage of the surface by cyclopentadienyl groups and the degree of their utilization in anchoring the titanium complex have been investigated. ESCA study has shown that the above anchoring leads to formation of the silica-supported bis(h5-cyclopentadienyl)dichlorotitanium(IV) complex.

Controllable synthesis of phosphate-modified BiPO4 nanorods with high photocatalytic activity: surface hydroxyl groups concentrations effects

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 99712-99721 ◽  
Author(s):  
Yan Li ◽  
Yawen Wang ◽  
Yu Huang ◽  
Junji Cao ◽  
Wingkei Ho ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Surface Modification ◽  
Photocatalytic Performance ◽  
High Photocatalytic Activity ◽  
Hydroxyl Groups ◽  
Controllable Synthesis ◽  
Surface Hydroxyl ◽  
Methylene Orange ◽  
Surface Hydroxyl Groups

Surface modification by phosphate efficiently improves the photocatalytic performance of BiPO4 for the degradation of methylene orange (MO), by enhancing the concentration of surface hydroxyl groups and improving its hydrophilicity.

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