锌镁铝类水滑石的制备与表征研究  

Preparation and Characterization of ZnMgAl Hydrotaicite-like Compounds

作　　者：袁东[1] 周良芹[2] 

机构地区：[1]四川理工学院材料与化学工程学院,自贡643000 [2]四川理工学院分析测试中心,自贡643000

出　　处：《硅酸盐通报》2016年第3期748-752,757,共6页Bulletin of the Chinese Ceramic Society

基　　金：四川省科技厅(2013JY0081);绿色催化四川省高校重点实验室开放基金项目(LYJ1405);四川理工学院校级培育项目(2012PY02)

摘　　要：以锌、镁、铝的水合硝酸盐及尿素等为主要原料,通过水热合成法制备具有层状结构的锌镁铝类水滑石(ZnMgAl-HTLCs)。采用XRD、SEM、FT-IR及MP-AES等对样品的晶体结构、微观形貌、元素组成及材料表面性质等进行了表征分析。考察了锌的掺杂量、尿素浓度、二价三价金属离子比和溶剂等因素对水滑石结构及形貌的影响。结果表明,M^(2+)/M^(3+)为4.5∶1~6∶1,锌的掺入比例在10%~30%之间,尿素的浓度为0.54~0.61 mol/L,时间为24 h,可以得到结构单一和形貌较好的锌镁铝类水滑石。Using Zn（NO3）2·6H2O,Mg（ NO3）2·6H2O,Al（ NO3）3·9H2O and urea as raw materials,a sorbent Zn Mg Al Hydrotalcite-like Compounds（ Zn Mg Al-HTLCs） with layered structure were prepared by hydrothermal synthesis method. The structure, morphology, thermal decomposition behavior,elementary composition and surface properties of Zn Mg Al-HTLCs were characterized by XRD,SEM,FTIR,MP-AES and IGC. The effects such as the metal molar content of M2＋to M3＋,concentration of Zn,urea dosage and solvent were studied. The results show that Zn Mg Al-HTLCs with single hydrotalcite phase and perfect layered structure can be obtained at M2＋to M3＋molar ratios in range of 4. 5 and 6along with Zn molar content of 10%-30%,urea concentration in range of 0. 46-0. 61 mol / L,continuing temperature of 110 ℃ for 24 h.

关 键 词：类水滑石 水热合成法 锌镁铝复合物 层状双氢氧化物 

分 类 号：O611[理学—无机化学]