Search

CdS microspheres with hierarchical structures were prepared with sodium dodecylbenzenesulfonate (SDBS) as structure directing reagent. SEM analysis indicated that the CdS microspheres were constructed with CdS nanosheets, which were further built up with assembled CdS nanoparticles. Optical investigation showed that the obtained CdS microspheres have an UV–vis absorption at 445 nm and photoluminescence (PL) emissions at 498 and 573 nm. The CdS hierarchical microspheres were immobilized on a glassy carbon electrode and the electrochemiluminescence (ECL) properties were investigated. The first application to sensing H 2 O 2 was studied based on ECL from CdS hierarchical microspheres. A linear relation between the ECL intensity and H 2 O 2 concentration, I = 2.4212 + 2.1713 c , was obtained with a detection limit of 1 × 10 −8 mol·L − 1 .

This paper describes a one-pot surfactant-assisted hydrothermal method for the synthesis of Ag-TiO 2 composite hollow structures with high photocatalytic activity. TEM measurement reveals that the sample is composed of hollow spheres and their tube-like aggregates. The surfactant cetyltrimethylammonium bromide (CTAB) plays a key role in the construction of the Ag-TiO 2 hollow structures. The Ag-TiO 2 hollow structures showed effective photocatalytic activity for the decomposition of methyl orange.

A new compound in the system K2OCeO2P2O5H2O (K2Ce(PO4)2 · H2O) has been hydrothermally synthesized and characterized by X-ray powder diffraction, differential thermal analysis, thermogravimetric analysis, composition analysis, IR, Raman and impedance spectra. The product crystallized as an orthorhombic phase with a = 12.79(3) A , b = 14.01(5) A , c = 15.94(3) A and v = 2854 A 3 . The compound is a proton conductor at temperatures below 180 °C, an insulator between 180 °C and 320 °C, and a potassium-ion conductor above 340 °C. The proton conductivities of the compound were 1.70 × 108 S cm−1 at 40 °C and 1.95 × 10−7 S cm−1 at 160 °C, and the K-ion conductivity 1.62 × 10−9 S cm−1 at 340 °C.

β-Na 3 Ce(PO 4 ) 2 has been hydrothermally synthesized in the system Na 2 OCe 2 O 3 P 2 O 5 H 2 O (CePO 4 Na 3 PO 4 ). The product was characterized by X-ray powder diffraction, differential thermal and thermogravimetric analyses, Raman and IR spectroscopy.