Interlayer-free Silica-carbon Template Membranes from Pectin and P123 for Water Desalination

Syauqiyah, None Isna; Elma, Muthia; Putra, Meilana Dharma; Rahma, Aulia; Pratiwi, Amalia Enggar; Rampun, Erdina Lulu Atika

doi:10.1051/matecconf/201928003017

Cited by 12 publications

(8 citation statements)

References 19 publications

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“…For other method, hybrid organic-inorganic silica structure was investigated that silica-pectin as carbon templates promised excellent membrane due to its excellent performance indicated by 5 times water flux higher than using templeting carbon sourced from P123 triblock copolymer. Therefore, pectin as natural source of carbon and easy obtained from fruit peel or industries waste can reduce one step process of templating and high production cost [13].…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Si-C Using TEOS (Tetra Ethyl Ortho Silica) as Precursor and Organic Catalyst

et al. 2020

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Silica network was tailored configuring siloxane (Si-O-Si) and silanol (Si-OH) groups which are essential to produce porous-structured materials. As silanols are hydrophilic, react with water to form fouling. This research address to actualize strategy for synthesizing highly functionalized silica carbon (Si-C) using hybrid organic-inorganic structures as the primary method for improving hydro-stability by employing precursor TEOS and organic catalyst through a sol-gel process. Catalysis employs citric acid or citric acid-ammonia whereas carbon templated into silica network. The synthesis scheme involves: a) sol-gel process at 0°C and b) calcination. Silica sol dried into xerogels were prepared and calcined at 200°C and 250°C. Characterization of xerogels showed the infrared band areas of the organic groups to evaluate the thermal stability. For xerogel employed single (pH 5.5) and dual (pH 7.65) catalyst, infrared spectra showed mostly look similar Si-C area at similar wavelength. Silica xerogel is more effectively prepared from TEOS with one-step single acid catalyst including calcination.

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Section: Introductionmentioning

confidence: 99%

Functionalization of Si-C Using TEOS (Tetra Ethyl Ortho Silica) as Precursor and Organic Catalyst

et al. 2020

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“…brane with great performance (Elma Muthia & Setyawan, 2018;Mujiyanti et al, 2019;Pratiwi et al, 2019a;Rampun Erdina Lulu Atika et al, 2019;Syauqiyah et al, 2019). Instead of the air, the vacuum condition in this research successfully preventing a high lost mass of organic carbon.…”

Section: Characteristic Of Organo-silica Membranementioning

confidence: 83%

“…Pervaporation is a desalination technology to produce a clean water with relatively low energy consumption compared to reverse osmosis membranes but still produces relatively a high flux (Kaminski et al, 2018;Rahma et al, 2019). Pervaporation has offered several advantages such as high selectivity, low operating costs, can be operated at low pressure and high temperature, and offers a higher molecular sieving compared to zeolite and organic membranes (Mahmud et al, 2020;Syauqiyah et al, 2019). The pervaporation process generally uses an-organic membrane made from silica (Rahma et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Organo-Silica Membrane Prepared from TEOS-TEVS Modified with Organic-Acid Catalyst for Brackish Water Desalination

Elma

Lestari

Sumardi³

et al. 2021

J. Rekayasa Kim. Lingkung.

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The sol gel process is one of the processes used in the manufacture of thin films on membranes because it can control the pore size in the resulting silica matrix. In addition, another way to build membrane size can be done by adding catalysts and precursors to be used. In this study, using a combination of tetraethyl ortho silicate (TEOS) and triethoxy vinyl silane (TEVS) precursors and citric acid as a catalyst to produce a silica matrix with mesoporous size so that it is suitable for application in the desalination process. The organo silica membrane was calcined at 350 ° C for 1 hour using the RTP calcination technique under vacuum, thus preventing the decomposition of carbon in the silica matrix. The membrane was dipcoated 4 times to obtain 4 layers. The FTIR (Fourier-transform Infrared Spectroscopy) test was carried out to see the functional groups on xerogel, namely silanol, siloxane and carbon. In addition, the performance of this membrane is carried out by desalination through pervaporation using 0.3% NaCl feed water with variations in feed air temperature, namely 25 ℃, 40 ℃ and 60 ℃. The resulting flux of air value increased with increasing feed water temperature, namely 6.1; 11.2; and 12.1 kg.m-2h-1 while the resulting salt rejection was 99.72; 99.64 and 99.23%. So that the organo silica membrane is suitable when applied to the desalination process through pervaporation.

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“…The silica sol was synthesized by a simple sol–gel technique, of which the following detail procedure refers to our previous work [ 22 , 23 ]. Firstly, silica sol via two-step catalyst was prepared by mixing TEOS and ethanol for 5 min in an ice bath at 0 °C with 250 rpm; subsequently, the diluted citric acid with demineralized water was dropwise, and the reagent bottle was moved from an ice bath into a water bath and subsequently reflux for an hour at 50 °C with mixing speed 2500 rpm.…”

Section: Methodsmentioning

confidence: 99%

Physicochemical Properties of Mesoporous Organo-Silica Xerogels Fabricated through Organo Catalyst

et al. 2021

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The physicochemical properties of organo-silica xerogels derived from organo catalyst were pervasively investigated, including the effect of one-step catalyst (citric acid) and two-step catalyst (acid-base), and also to observe the effect of sol pH of organo-silica xerogel toward the structure and deconvolution characteristic. The organo-silica xerogels were characterized by FTIR, TGA and nitrogen sorption to obtain the physicochemical properties. The silica sol–gel method was applied to processed materials by employing TEOS (tetraethyl orthosilicate) as the main precursor. The final molar ratio of organo-silica was 1:38:x:y:5 (TEOS:ethanol: citric acid: NH3:H2O) where x is citric acid concentration (0.1–10 × 10−2 M) and y is ammonia concentration (0 to 3 × 10−3 M). FTIR spectra shows that the one-step catalyst xerogel using citric acid was handing over the higher Si-O-Si concentration as well as Si-C bonding than the dual catalyst xerogels with the presence of a base catalyst. The results exhibited that the highest relative area ratio of silanol/siloxane were 0.2972 and 0.1262 for organo catalyst loading at pH 6 and 6.5 of organo-silica sols, respectively. On the other hand, the organo-silica matrices in this work showed high surface area 546 m2 g−1 pH 6.5 (0.07 × 10−2 N citric acid) with pore size ~2.9 nm. It is concluded that the xerogels have mesoporous structures, which are effective for further application to separate NaCl in water desalination.

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Interlayer-free Silica-carbon Template Membranes from Pectin and P123 for Water Desalination

Cited by 12 publications

References 19 publications

Functionalization of Si-C Using TEOS (Tetra Ethyl Ortho Silica) as Precursor and Organic Catalyst

Functionalization of Si-C Using TEOS (Tetra Ethyl Ortho Silica) as Precursor and Organic Catalyst

Organo-Silica Membrane Prepared from TEOS-TEVS Modified with Organic-Acid Catalyst for Brackish Water Desalination

Physicochemical Properties of Mesoporous Organo-Silica Xerogels Fabricated through Organo Catalyst

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