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Synthesis and characterization of a mesoporous Al-MCM-41 Molecular Sieve Material and its Moisture Regulation Performance in Water Molecule Adsorption/Desorption
Microporous and Mesoporous Materials ( IF 4.8 ) Pub Date : 2020-09-21 , DOI: 10.1016/j.micromeso.2020.110643
Ya-Wen Lin , Ta-Wui Cheng , Kang-Wei Lo , Chiao-Ying Chen , Kae-Long Lin

In this study, liquid crystal display waste glass (LCDwg) and chemical mechanical polishing sludge (CMPs) were investigated as alternative sources of SiO2 and Al2O3 for the preparation of the mesoporous moisture regulation material Al-MCM-41 (MRMCM). The aluminosilicate supernatant from the alkali fusion of LCDwg and CMPs and the surfactant cationic cetyltrimethylammonium bromide (CTAB) were used as structure-directing agents. Synthesis was carried out by alkali fusion and hydrothermal methods, and the factor affecting the synthesis was the alkali fusion liquid-solid ratio. Reliable instruments and methods, including XRD, TEM, XRF, BET and BJH, were employed for characterization of the fabricated MRMCM. The results show that the pore size of these materials was between 3.0 and 4.5 nm, and with an increase in the liquid-solid ratio, the specific surface area of MRMCM increased to a maximum value of 1260 m2/g and exhibited a mesoporous structure. In addition, the hydrothermal temperature and the specific surface area also had a significant positive correlation as the temperature increased such that the surface area increased from 370 m2/g to 601 m2/g, which is a significant increase of 1.62 times. MRMCM exhibited a positive linear correlation between pore volume and specific surface area during 48 h of moisture absorption and desorption, and the amount of moisture absorbed by mesoporous MRMCM was determined. Thus, the mesoporous molecular sieves met Japan Industrial Standard JIS A 1470–1 2002, which regulates moisture regulation building materials (response to humidity variation > 29 g/m2). Therefore, the materials can be utilized in multiple applications, particularly as moisture regulation materials in building engineering.



中文翻译:

介孔Al-MCM-41分子筛材料的合成,表征及其在水分子吸附/解吸中的水分调节性能

在这项研究中,研究了液晶显示器废玻璃(LCD wg)和化学机械抛光污泥(CMP s)作为SiO 2和Al 2 O 3的替代来源,用于制备介孔水分调节材料Al-MCM-41( MRMCM)。LCD wg和CMP s的碱熔铝硅酸盐上清液用表面活性剂阳离子十六烷基三甲基溴化铵(CTAB)作为结构导向剂。通过碱熔融和水热法进行合成,影响合成的因素是碱熔融液固比。可靠的仪器和方法,包括XRD,TEM,XRF,BET和BJH,被用于表征所制造的MRMCM。结果表明,这些材料的孔径在3.0至4.5 nm之间,并且随着液固比的增加,MRMCM的比表面积增加到最大值1260 m 2/ g,并显示出中孔结构。另外,随着温度升高,水热温度与比表面积也具有显着的正相关性,使得表面积从370m 2 / g增加至601m 2 / g,这是1.62倍的显着增加。在48 h的水分吸收和解吸过程中,MRMCM表现出孔体积与比表面积之间的正线性关系,并测定了中孔MRMCM的吸收量。因此,介孔分子筛符合日本工业标准JIS A 1470-1 2002,该标准对湿度调节建筑材料进行调节(对湿度变化> 29 g / m 2的响应))。因此,该材料可用于多种应用中,特别是在建筑工程中用作湿度调节材料。

更新日期:2020-10-05
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