Improved method for preparation of anhydrous silica by microwave irradiation with spectroscopic characterization and toxicity assay

被引：9

作者：

Ashfaq, Muhammad ^{[1
]}

Tabassum, Rukhsana ^{[1
]}

Ahmed, Muhammad Mahboob ^{[1
]}

Mehmood, Karamat ^{[1
]}

Asghar, M. ^{[2
]}

Hussain, Tanveer ^{[3
]}

机构：

[1] Islamia Univ Bahawalpur, Dept Chem, Bahawalpur, Pakistan

[2] Islamia Univ Bahawalpur, Dept Phys, Bahawalpur, Pakistan

[3] Islamia Univ Bahawalpur, Cholistan Inst Desert Studies, Bahawalpur, Pakistan

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2012年 / 358卷 / 04期

关键词：

SiO2 (mw) = SiO2 prepared through microwave technique; SiO2 (mwc) = SiO2 prepared through microwave followed by calcination; SiO2 ((R)) = SiO2 prepared by reported method; MESOPOROUS SILICA; DIATOMACEOUS-EARTH; RATS; NANOPARTICLES; BONE; PARTICLES; AMMONIA; DUSTS; SIZE;

D O I：

10.1016/j.jnoncrysol.2011.12.078

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Amorphous anhydrous silica SiO2 (mw) (99.99%) is successfully synthesized through microwave irradiation technique and time of reaction is reduced up to 1 h. The dehydration phase study of Si-water, Si-OH, Si-O-Si networking, elemental analysis and surface morphology was carried out by FTIR, FTNIR, SEM and EDAX spectroscopic techniques. The broad absorption stretching and bending of Si-OH and H2O at 3695.38-2832.96 cm(-1), 1638 cm(-1) and 1191.20-1017.14 cm(-1) completely disappeared and appearance of new bands at 946.93 and 797.63 cm(-1) confirmed the amorphous anhydrous silica with Si-O-Si networking. The SEM images of SiO2 ((mwc)) described the smooth and fine particle texture and confirmed 99.99% Si-O-Si networking of anhydrous silica. The 99.99% purity was verified by EDAX spectra which exhibited sharp signals only for oxygen and silicon. Toxicity against Monomorium minimum and Tribolium castaneum with 100% mortality and LT(50)91 min and 7.5 h respectively is being reported. It can be used for long storage of grains in the future. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：847 / 853

页数：7

共 45 条

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