scholarly journals Silica-Rice Husk as Adsorbent of Cr (VI) Ions Prepared through Sol-Gel Method

2021 ◽  
Vol 4 (1) ◽  
pp. 65-73
Author(s):  
Siti Rodiah ◽  
Mifta Huljana ◽  
Jauharuddin Luthfi Al Jabbar ◽  
Chairul Ichsan ◽  
Hasan Marzuki
Keyword(s):  
Textile Industry ◽  
Sol Gel ◽  
Freundlich Isotherm ◽  
Textile Wastewater ◽  
Adsorption Efficiency ◽  
Optimum Conditions ◽  
Bending Vibration ◽  
Gel Method ◽  
Sol Gel Method ◽  
Negative Impacts

One of the heavy metals contained in the textile industry wastewater is chromium (Cr). Chromium hexavalent ions (Cr6+) are highly toxic and its accumulation in the human body will cause various negative impacts. This study aimed to determine the characteristics of silica synthesized by the sol-gel method to gain homogeneity and high purity. Synthesized silica was calcined at 700°C for 4 hours and its performance to adsorb Cr(VI) ions  in textile wastewater was investigated. The presence of -OH group from silanol (–Si-OH) was appeared at wavenumber 3367.70 cm-1, meanwhile siloxane functional groups were recorded at 1056.99 cm-1 and 784.38 cm-1 due to the O-Si-O asymmetric stretching and Si-O bending vibration. Optimum conditions of silica to adsorb Cr(VI) ions took place at pH 2 and contact time of 90 minutes by adsorption efficiency of 75,65% and followed the Freundlich isotherm.

OPTIMIZING PARAMETERS IN SYNTHESIS OF LiF NANOPOWDERS VIA SOL–GEL METHOD

NANO ◽  
2011 ◽  
Vol 06 (06) ◽  
pp. 575-581 ◽  
Author(s):  
FAEZEH NIKANJAM ◽  
RASOUL SARRAF-MAMOORY ◽  
NASTARAN RIAHI-NOORI
Keyword(s):  
Lithium Fluoride ◽  
Sol Gel ◽  
Decomposition Temperature ◽  
Organic Additive ◽  
Ion Concentration ◽  
Optimum Conditions ◽  
Gel Method ◽  
Sol Gel Method ◽  
Li Ion ◽  
Gel Processing

Lithium fluoride (LiF) nanopowders were prepared by trifluoroacetate-based sol–gel processing. In this work, lithium acetate dehydrate ( LiAc ⋅ 2H2O ) and trifluoroacetic acid (TFA) was used as lithium and fluorine sources. The thermal behavior of initial gel was examined using differential thermal analysis (DTA). Effects of solvent (glacial acetic acid, absolute ethanol, and ethylene glycol), Li+ concentration (0.5, 1, and 2 mol/l) and decomposition temperature (200, 250, and 300°C) on synthesis of LiF nanopowders by sol–gel method were investigated. The results of LPSA, FE-SEM, and XRD showed that the growth of particles and aggregation can be controlled by changing above parameters. However, it is indicated that optimum conditions are; solvent as ethanol, Li ion concentration (0.5 mol/l), and decomposition temperature (300°C), respectively. Also, the addition of oleic acid as an organic additive made the final LiF particles finer and about 70–90 nm.

Synthesis and Photocatalytic Property of N-doped BiVO$lt;inf$gt;4$lt;/inf$gt; via Sol-Gel Method Using Corn Stem as Template

2014 ◽  
Vol 29 (8) ◽  
pp. 807
Author(s):  
WANG Min ◽  
NIU Chao ◽  
DONG Zhan-Jun ◽  
CHE Yin-Sheng ◽  
DONG Duo ◽  
...  
Keyword(s):  
Sol Gel ◽  
Photocatalytic Property ◽  
Gel Method ◽  
Sol Gel Method

Fe2O3 - TiO2 THIN FILMS PREPARED BY SOL-GEL METHOD

2011 ◽  
Vol 10 (2) ◽  
pp. 187-192 ◽  
Author(s):  
Ramona-Crina Suciu ◽  
Marcela Corina Rosu ◽  
Teofil Danut Silipas ◽  
Emil Indrea ◽  
Violeta Popescu ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Gel Method ◽  
Sol Gel Method

NiO-doped CaCu3Ti4O12 Thin Film by Sol-Gel Method

2013 ◽  
Author(s):  
Dong XU ◽  
Qi SONG ◽  
Ke ZHANG ◽  
Hong-Xing XU ◽  
Yong-Tao YANG ◽  
...  
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Polycrystalline Mullite Fibers Prepared by Sol-Gel Method

2009 ◽  
Vol 24 (4) ◽  
pp. 848-852 ◽  
Author(s):  
Cheng-Shun LI ◽  
Yu-Jun ZHANG ◽  
Jing-De ZHANG
Keyword(s):  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Mullite Fibers
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