Removal of cadmium from aqueous solution by organic-inorganic hybrid sorbent combining sol-gel processing and imprinting technique

2013 ◽  
Vol 30 (5) ◽  
pp. 1111-1118 ◽  
Author(s):  
Jin-Bao Wu ◽  
Yan-Li Yi
Keyword(s):  
Aqueous Solution ◽  
Sol Gel ◽  
Inorganic Hybrid ◽  
Hybrid Sorbent ◽  
Gel Processing

Sol–gel derived organic–inorganic hybrid sorbent for removal of Pb2+, Cd2+ and Cu2+ from aqueous solution

2012 ◽  
Vol 64 (2) ◽  
pp. 418-426 ◽  
Author(s):  
Hong-Tao Fan ◽  
Zi-Jie Su ◽  
Xue-Lei Fan ◽  
Meng-Meng Guo ◽  
Juan Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sol Gel ◽  
Inorganic Hybrid ◽  
Hybrid Sorbent

Highly effective removal of Cu(II) in aqueous solution by using mesoporous TiO2

2019 ◽  
Vol 80 (5) ◽  
pp. 884-891
Author(s):  
Daying Chen ◽  
Nasi Tu ◽  
Changkun Si ◽  
Meilin Yin ◽  
Xiaohui Wang
Keyword(s):  
Aqueous Solution ◽  
Low Cost ◽  
Sol Gel ◽  
Mesoporous Tio2 ◽  
Adsorption Efficiency ◽  
Batch Experiments ◽  
Order Model ◽  
Effective Removal ◽  
Pseudo Second Order ◽  
Gel Processing

Abstract Mesoporous TiO2 has been prepared by a brief and simple sol–gel processing and applied for the removal of Cu(II) from aqueous solution. The adsorption behavior of mesoporous TiO2 for Cu(II) was investigated using batch experiments. Results showed that the pseudo-second-order model and Langmuir isotherm were more accurate to describe the kinetics process and adsorption isotherm. Mesoporous TiO2 adsorbent displayed excellent Cu(II) adsorption efficiency (195.52mg g−1). The thermodynamic parameters showed that the adsorption was spontaneous and endothermic. It was also found that mesoporous TiO2 could be used at least seven times without obvious loss of its original adsorption efficiency. Therefore, the obtained mesoporous TiO2 could be employed as an effective and low-cost adsorbent for removal of Cu(II) from contaminated effluents.

Non-Hydrolyzed Resins for Organic-Inorganic Hybrid Coatings

2017 ◽  
pp. 771-801 ◽  
Author(s):  
Stefan Holberg
Keyword(s):  
Protective Coatings ◽  
Sol Gel ◽  
Hybrid Coatings ◽  
Industrial Scale ◽  
Atmospheric Moisture ◽  
Inorganic Hybrid ◽  
Chemical Structures ◽  
Hydrolysis And Condensation ◽  
Gel Processing ◽  
Area Of Application

This chapter focuses on resins based on non-hydrolyzed, monomeric and polymeric alkoxysilanes. As alternative to classical sol-gel processing, the resins are applied to a surface without a preceding hydrolysis step. Only after application, hydrolysis and condensation of the alkoxysilyl groups occur by means of atmospheric moisture to result cross-linked organic-inorganic hybrid coatings. While the use of non-hydrolyzed silanes is well established, for example by applying polyethyl silicate as binder for zinc-rich anti-corrosive primers, this chapter describes the chemical structures of various novel organic-inorganic hybrid precursors that have significantly extended the area of application to adhesives and scratch-resistant, repellent, or anti-fouling coatings. At present, individual resins are produced and applied at industrial scale in the fields of protective coatings and automotive topcoats.

Organic–Inorganic Hybrid Sol–Gel Materials For Optical Waveguide Application

2012 ◽  
Author(s):  
Ahmad Sharmi Abdullah ◽  
Amirjan Nawabjan ◽  
Norazan Mohd Kassim ◽  
Mohd Haniff Ibrahim ◽  
Mohamad Zahid Abdul Malek
Keyword(s):  
Optical Waveguide ◽  
Spin Coating ◽  
Optical Waveguides ◽  
Quartz Substrate ◽  
Sol Gel ◽  
Single Mode ◽  
Processing Technique ◽  
Inorganic Hybrid ◽  
Gel Processing ◽  
Butt Coupling

Pandu gelombang optik jalur berasaskan bahan–bahan sol–gel organik–bukan organic (hybrid) direka, disimulasi dan dibentuk. Bahan–bahan sol–gel hybrid tersebut disediakan daripada vinyltriethoxysilane (VTES), tetraethoxysilane (TEOS) dan tetrabutoxytitanate (TTBu) malalui kaedah pemprosesan sol–gel. Pandu gelombang optik tersebut telah dibentuk di atas lapisan quartz menggunakan kaedah penyalutan berputar, lithografi langsung, dan goresan kimia basah. Beberapa lapisan sol telah dibentuk demi mendapatkan struktur pandu gelombang dengan ketebalan yang sesuai untuk laluan mod cahaya sebagaimana diperolehi daripada simulasi. Kebolehan pandu gelombang untuk memandu cahaya pada panjang gelombang 1550 nm telah dicirikan mengunakan kaedah direct end–face fiber butt–coupling. Struktur fizikal pandu gelombang tersebut telah diperhatikan melalui mikroskop berkuasa tinggi. Keputusan yang diperolehi menunjukkan bahawa bahan yang dicadangkan boleh digunakan dalam aplikasi pemanduan gelombang optik pada panjang gelombang 1550 nm. Simulasi menunjukkan bahawa pandu gelombang jalur satu mod dapat direalisasikan jika ketebalan dan kelebaran pandu gelombang tersebut berada pada suatu julat nilai tertentu. Julat nilai tersebut dapat diperolehi melalui pengawalan parameter–parameter penyalutan berputar dan pembentukan mikro. Kualiti keratan rentas yang baik juga diperhatikan telah diperolehi melalui kaedah pembelahan semulajadi. Kata kunci: Pemprosesan sol–gel; bahan organik–bukan organic; pandu gelombang jalur Ridge optical waveguides based on organic–inorganic (hybrid) sol–gel materials were designed, simulated and fabricated. The hybrid sol–gel materials were synthesized from vinyltriethoxysilane (VTES), tetraethoxysilane (TEOS) and tetrabutoxytitanate (TTBu) precursors by means of sol–gel processing technique. The optical waveguides were fabricated on quartz substrate using spin coating, direct photolithography, and wet chemical etching techniques. Multiple layers of sol were deposited so as to obtain waveguide structure with suitable thickness for mode propagation such as acquired from the simulation. Waveguiding ability of the ridge optical waveguides at 1550 nm wavelength was characterized using direct end–face fiber butt–coupling method. Physical structure of the waveguides was observed through high power microscope. Observation showed that the proposed material possesses the ability for waveguiding application at the wavelength of 1550 nm. Simulation showed that a single mode ridge optical waveguide could be realized provided that the structure thickness and width are within certain range. The range is attainable through proper control of spin coating and micropatterning parameters. Acceptable end–face quality resulted from natural cleaving process was also discovered. Key words: Sol–gel processing; organic–inorganic material; ridge optical waveguide

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