Organic-Inorganic Hybrid Supermicroporous Iron(III) Phosphonate Nanoparticles as an Efficient Catalyst for the Synthesis of Biofuels
作者:Malay Pramanik、Asim Bhaumik
DOI:10.1002/chem.201300128
日期:2013.6.24
and FTIR spectroscopic tools were used to characterize the materials. The triclinic crystal phase [P(2) space group] of the hybrid iron phosphonate was established by a Rietveld refinement of the PXRD analysis of HFeP‐1‐3 by using the MAUD program. The unit cell parameters are a=8.749(1), b=8.578(1), c=17.725(3) Å; α=104.47(3), β=97.64(1), γ=113.56(3)°; and V=1013.41 Å3. With these crystal parameters
Self-assembled titanium phosphonate nanomaterial having a mesoscopic void space and its optoelectronic application
作者:Malay Pramanik、Astam K. Patra、Asim Bhaumik
DOI:10.1039/c3dt32744b
日期:——
Here we report the synthesis of a new crystalline titanium phosphonate material (HTiP-7) having a self-assembled nanostructure and a mesoscopic void space without the aid of any surfactant or templating agent. The material has been synthesized hydrothermally through the reaction between benzene-1,3,5-triphosphonic acid (BTPA) and titanium(IV) isopropoxide at neutral pH at 453 K for 24 h. This hybrid phosphonate material has been thoroughly characterized by powder X-ray diffraction, N2 sorption, HR TEM, FE SEM, TG-DTA, FT IR and UV-Vis diffuse reflectance spectroscopic studies. Two very well-known software packages, REFLEX and CELSIZ unit cell refinement programs, are employed to establish the triclinic crystal phase of this hybrid material (HTiP-7). Very tiny nanocrystals of HTiP-7 self-aggregated to form spherical nanoparticles of dimension ca. 25 nm together with a mesoscopic void space and good BET surface area (255 m2 g−1). The framework is thermally stable up to 650 K. The material showed excellent carrier mobility for photocurrent generation in the presence of a photosensitizer molecule (Rose Bengal). To the best of our knowledge this is the first report of a photon-to-electron energy transfer process over a dye doped titanium phosphonate nanomaterial.
在这里,我们报告了一种新型结晶磷酸钛材料(HTiP-7)的合成,该材料具有自组装纳米结构和介观空隙空间,无需任何表面活性剂或模板剂的帮助。该材料是通过苯-1,3,5-三膦酸 (BTPA) 和异丙醇钛 (IV) 在中性 pH 值、453 K 下反应 24 小时水热合成的。这种杂化膦酸盐材料已通过粉末 X 射线衍射、N2 吸附、HR TEM、FE SEM、TG-DTA、FT IR 和 UV-Vis 漫反射光谱研究进行了彻底表征。采用两个非常知名的软件包 REFLEX 和 CELSIZ 晶胞细化程序来建立这种杂化材料 (HTiP-7) 的三斜晶相。非常微小的 HTiP-7 纳米晶体自聚集形成尺寸约为 10 微米的球形纳米颗粒。 25 nm 以及介观空隙空间和良好的 BET 表面积 (255 m2 g−1)。该框架在高达 650 K 的温度下具有热稳定性。该材料在光敏剂分子(玫瑰红)存在的情况下表现出优异的光电流产生载流子迁移率。据我们所知,这是第一份关于染料掺杂的膦酸钛纳米材料上的光子到电子能量转移过程的报告。
Template-free synthesis of nanoporous gadolinium phosphonate as a magnetic resonance imaging (MRI) agent
作者:Malay Pramanik、Fa-Kuen Shieh、Saad M. Alshehri、Zeid Abdullah Alothman、Kevin C.-W. Wu、Yusuke Yamauchi
DOI:10.1039/c5ra02004b
日期:——
Organic–inorganic hybrid porous gadolinium phosphonate materials are synthesized using benzene-1,3,5-triphosphonic acid as phosphonic acid linker.