ABSTRACT
In this study, the complete mitochondrial genome of Hippopus porcellanus was reported. The whole mitochondrial genome was 21,565bp in length with a typical mitochondrial genomic structure including 13 protein-coding genes, 23 transfer RNA genes, 2 ribosomal RNA genes and 1 control region (D-loop). Mitogenome base composition was biased toward A + T content, at 60.3%. A phylogenetic tree based on complete mitogenome sequences revealed that, H. porcellanus is closely related to H. hippopus, both of which belong to the genus Hippopus.
ABSTRACT
A series of TiO(2)-Cu(2)O mixed oxides were prepared by the hydrolysis of titanium butoxide and reduction of copper acetate with hydrazine. These composite oxides were characterized by X-ray diffraction (XRD), inductively coupled plasma spectrometry (ICP), high-resolution transmission electron microscopy (HRTEM), N(2) adsorption and UV-vis techniques. Photocatalytic degradation of dodecyl-benzenesulfonate (DBS) under visible irradiation was performed, and effects of composition of catalysts and reaction conditions were studied. It was observed that TiO(2)-Cu(2)O composite oxides exhibited better photocatalytic activity than Cu(2)O or TiO(2) alone. Among these composite oxides, the 5%TiO(2)-Cu(2)O displayed the highest activity, and the degradation percentage of DBS and COD reached 97.3% and 65%, respectively. In addition, it was found that the decomposition of DBS followed the first-order kinetics and the adsorption of DBS followed the Langmuir model. Oxygen in solution played a vital role in the elimination of COD.
