Precursor-Derived Rare Earth Metal Pyrochlores: Nd<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> Nanofibers and Thin Films As Efficient Photoabsorbers
作者:Aida Jamil、Johannes Schläfer、Yakup Gönüllü、Ashish Lepcha、Sanjay Mathur
DOI:10.1021/acs.cgd.6b00815
日期:2016.9.7
Single phase rare earth pyrochlores, Ln2M2O7, were produced as nanofibers and thin films by electrospinning and spin-coating of chemical sols obtained from bimetallic metal–organic precursors, LnIIIMII(OtBu)5Py (LnIII = La, Pr, Nd, Sm, Er, Yb; MII = Ge, Sn, Pb; Py = pyridine). Compatibility of the metal ratio in the single-source compounds was confirmed by single crystal X-ray diffraction analyses
单相稀土烧绿石Ln 2 M 2 O 7,是通过对从双金属金属有机前体Ln III M II(O t Bu)5 Py(Ln )获得的化学溶胶进行静电纺丝和旋涂而制成的纳米纤维和薄膜。III = La,Pr,Nd,Sm,Er,Yb; M II= Ge,Sn,Pb; Py =吡啶)。通过单晶X射线衍射分析证实了单源化合物中金属比例的相容性,并且在加工过程中保留了该比例,因为粉末状XRD和TEM研究证实,晶状烧绿石材料源自无定形陶瓷骨料。发现Nd 2 Sn 2 O 7纳米纤维的光催化活性明显高于TiO 2。以双层Nd 2 Sn 2 O 7 // Fe 2 O 3的形式沉积在F:SnO 2上的Nd 2 Sn 2 O 7薄膜光阳极对水分解反应显示出优异的光电化学(PEC)效率,其光电流密度比裸Fe 2 O 3光阳极高3倍以上。