Electrochemically deposited Pd nanorod array/sol–gel silica thin film for the fabrication of electrochemical sensors

2012 ◽  
Vol 166-167 ◽  
pp. 837-841 ◽  
Author(s):  
Fengli Qu ◽  
Haiyi Sun ◽  
Yi Zhang ◽  
Hongmei Lu ◽  
Minghui Yang
Keyword(s):  
Thin Film ◽  
Electrochemical Sensors ◽  
Sol Gel ◽  
Nanorod Array ◽  
Electrochemically Deposited ◽  
Silica Thin Film

scholarly journals Preparation of Hydrophobic Optical Silica Thin Film with Sol-gel Method

2001 ◽  
Vol 17 (12) ◽  
pp. 1112-1116
Author(s):  
Ma Jian-Hua ◽  
◽  
Wu Guang-Ming ◽  
Cheng Yin-Bing ◽  
Sun Qi ◽  
...  
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Silica Thin Film

scholarly journals Affinity of Electrochemically Deposited Sol–Gel Silica Films towards Catecholamine Neurotransmitters

Sensors ◽  
2019 ◽  
Vol 19 (4) ◽  
pp. 868
Author(s):  
María Porcel-Valenzuela ◽  
Francisco Huerta ◽  
Emilia Morallón ◽  
Francisco Montilla
Keyword(s):  
Electrochemical Sensors ◽  
Sol Gel ◽  
Silica Films ◽  
Glassy Carbon Electrodes ◽  
Similar Chemical ◽  
Electrochemically Deposited ◽  
Amine Groups ◽  
Silica Layers ◽  
Electroassisted Deposition ◽  
Selective Analysis

Dopamine, norepinephrine, and epinephrine neurotransmitters can be detected by electrochemical oxidation in conventional electrodes. However, their similar chemical structure and electrochemical behavior makes a difficult selective analysis. In the present work, glassy carbon electrodes have been modified with silica layers, which were prepared by electroassisted deposition of sol–gel precursors. These layers were morphologically and compositionally characterized using different techniques, such as field emission scanning electron microscopy (FESEM), TEM, FTIR, or thermogravimetric analysis–mass spectrometry (TG-MS). The affinity of silica for neurotransmitters was evaluated, exclusively, by means of electrochemical methods. It was demonstrated that silica adsorbs dopamine, norepinephrine, and epinephrine, showing different interaction with silica pores. The adsorption process is dominated by a hydrogen bond between silanol groups located at the silica surface and the amine groups of neurotransmitters. Because of the different interaction with neurotransmitters, electrodes modified with silica films could be used in electrochemical sensors for the selective detection of such molecules.

Sol–gel synthesis and characterization of Ag2S nanocrystallites in silica thin film glasses

1999 ◽  
Vol 9 (11) ◽  
pp. 2893-2898 ◽  
Author(s):  
Lidia Armelao ◽  
Paolo Colombo ◽  
Monica Fabrizio ◽  
Silvia Gross ◽  
Eugenio Tondello
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Silica Thin Film ◽  
Sol Gel Synthesis

Sol–Gel-Based Titania–Silica Thin Film Overlay for Long Period Fiber Grating-Based Biosensors

2015 ◽  
Vol 87 (24) ◽  
pp. 12024-12031 ◽  
Author(s):  
Francesco Chiavaioli ◽  
Palas Biswas ◽  
Cosimo Trono ◽  
Sunirmal Jana ◽  
Somnath Bandyopadhyay ◽  
...  
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Silica Thin Film ◽  
Period Fiber Grating

Electrochemically Deposited Sol−Gel-Derived Silicate Films as a Viable Alternative in Thin-Film Design

2003 ◽  
Vol 75 (20) ◽  
pp. 5399-5405 ◽  
Author(s):  
P. N. Deepa ◽  
Mandakini Kanungo ◽  
Greg Claycomb ◽  
Peter M. A. Sherwood ◽  
Maryanne M. Collinson
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Viable Alternative ◽  
Electrochemically Deposited

Effect of Different Dip-Coating Techniques on TiO2 Thin Film Properties

2016 ◽  
Vol 721 ◽  
pp. 128-132 ◽  
Author(s):  
Kaspars Malnieks ◽  
Gundars Mezinskis ◽  
Ilona Pavlovska
Keyword(s):  
Thin Film ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Soda Lime ◽  
Nanorod Array ◽  
Dip Coating ◽  
Film Structure ◽  
Glass Slides ◽  
Soda Lime Silicate Glass ◽  
Sol Gel Films

TiO2 three-layer sol-gel films have been deposited on soda-lime silicate glass slides and dried in two different ways to study the effect of drying on thin film structure. The structural properties, surface topography and photocatalytic activity of the films were studied by X-ray diffraction, atomic force microscopy, and by analysing photocatalytic degradation of methyl orange, respectively. The titanium oxide sol-gel layers on glass slides dried at 20 °C before the deposition of next layers after final calcination at 500 °C resulted in a nanorod array film with good photocatalytic activity.

scholarly journals DESALINASI AIR LIMBAH PABRIK TAHU MENGGUNAKAN MEMBRAN SILIKA DENGAN PREKURSOR TEOS (Tetraethyl orthosilicate)

Konversi ◽  
2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Muthia Elma ◽  
Nur Riskawati ◽  
Marhamah Marhamah
Keyword(s):  
Thin Film ◽  
Thermal Process ◽  
Potable Water ◽  
Sol Gel ◽  
Water Flux ◽  
Tetraethyl Orthosilicate ◽  
Rapid Thermal Process ◽  
Base Catalysts ◽  
Acid And Base ◽  
Silica Thin Film

Abstrak: Air limbah pabrik tahu jika dibuang langsung ke lingkungan menyebabkan pencemaran lingkungan yang akan merusak kualitas air, terutama air limbah tersebut dialirkan ke badan sungai. Oleh sebab itu, sangatlah diperlukan suatu teknologi yang efisien untuk pengolahan air limbah tahu ini. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh performansi membran silika pada proses desalinasi via pervaporasi. Penelitian ini dilakukan dengan menyiapkan silika sol yang dipersiapkan dari proses sol-gel menggunakan prekursor TEOS dalam larutan etanol. Selanjutnya adalah dengan menggunakan metode “2 step acid and base catalysts” dengan menggunakan HNO3 dan NH3 sebagai katalis. Silica thin film yang dihasilkan berupa sol di-dipcoating dan kemudian dilakukan proses kalsinasi pada suhu 600oC selama 1 jam menggunakan metode RTP (Rapid Thermal Process). Jumlah lapisan/layer dari membran silika tersebut adalah berdasarkan pengulangan proses dipcoating dan kalsinasi yang mana pada penelitian ini menggunakan variasi 3 layer. Performansi membran ini dilakukan dengan proses desalinasi via pervaporasi dengan menggunakan air limbah tahu yang bertujuan untuk memperoleh air bersih. Adapun nilai water flux membrane ini berkisar antara 1,74 – 1,48 kg m-2 h-1 dengan rejection berkisar antara 93,63 – 89.27 %. Hasil ini membuktikan bahwa membrane silika bisa mengolah air limbah tahu menjadi potable water walaupun nilai water flux perlu ditingkatkan. Sebagai tambahan analisis, uji karakteristik membran seperti uji FTIR dilakukan untuk mengetahui gugus fungsi dari membran silika dan uji morfologi menggunakan SEM untuk mengetahui ketebalan lapisan membran yang dihasilkan.       Keywords: limbah tahu, water flux, rejection, membran silika dan pervaporasi.      

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