摘要
以硅酸钠为主要原料,用硫酸调节pH,通过液相沉淀法在凹土单晶表面原位生成纳米粒状二氧化硅,制备纳米二氧化硅/凹土复合粉体。利用XRD、TEM、TG-DTG、氮气吸附脱附曲线等方法对复合粉体进行表征。XRD表明,二氧化硅以非晶态的形式包覆在凹土表面,防止了凹土的团聚。TEM照片显示,包覆后的纳米二氧化硅粒径减小,粒度分布均匀,表面光滑。
Nanoparticles coated with silica were successfully synthesized via the liquid deposition method in which nanoparticles silica was produced on single crystal surface of attapulgite, using Na2 SiO3 as the main raw material and sulfuric acid as the neutralization agent. The structures and properties of the prepared samples were studied by X-ray diffraction （ XRD ） , Fourier transform infrared spectrometer （ FTIR ） , transmission electron microscopy （ TEM ） , Thermogravimetry-Dispiay transmission gererator （TG-DTG） and nitrogen adsorption-desorption isotherm. The XRD results show that there is non-crystal silica on the surface of nanoparticles, which prevents the nanoparticles from agglomerating. TEM images demonstrate that attapulgite coated with silica has smaller particle size, uniform size distribution and polished surface.
出处
《现代化工》
CAS
CSCD
北大核心
2012年第1期46-49,共4页
Modern Chemical Industry
基金
山东省优秀中青年科学家奖励基金计划(BS2010CL013)
江苏省高校自然科学研究重大项目(09KJA430002)
江苏省自然科学基金资助项目(BK2009748)
江苏省科技支撑计划项目(BE2009099)
2010年度高校科研成果产业化推进工程(JH10-53)
江苏省产学研前瞻性联合研究项目(BY2010123)
关键词
凹土
比表面
吸附-脱附曲线
孔径分布
表征
attapulgite
specific surface area
adsorption-desorption isotherm
pore size distribution
characterization
