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The exploration of novel photocatalyst is one of the important directions of developing efficient photocatalysis technology. Delafossite CuCoO2 has unique crystal structure, suitable band gap and energy band edge, and excellent catalytic activity, which is a new photocatalyst well worth developing. However, the as-prepared CuCoO2 samples in literature often have the problems of containing impurity or secondary phases, non-stoichiometry, leading to some controversies about its fundamental physicochemical properties. Moreover, there is also insufficient understanding of the use of CuCoO2 as a novel photocatalyst. Herein, one-pot hydrothermal method was used to prepare stoichiometric delafossite CuCoO2 microcrystals (~ 3.65 μm) with high purity and single-phase. Then, its detailed fundamental physicochemical properties as photocatalyst are further provided by a series of experimental characterization and density functional theory calculations. The results show that delafossite CuCoO2 exhibit outstanding semi-metallic ferromagnetism, multiple electron transitions caused by various band gap types, multi band absorption and full spectrum absorption, and has appropriate band edge position, which can be applied to HER and OER of water splitting. The photocatalytic performance of CuCoO2 was systematically tested for the first time by photocatalytic degradation of tetracycline hydrochloride, photocatalytic water-splitting, and photocurrent measurement in PEC cell. Under visible light irradiation, the as-prepared CuCoO2 can degrade more than 90% of tetracycline hydrochloride within 4 h. Without sacrificial agent and cocatalyst, the shows the hydrogen and oxygen evolution rates from photocatalytic water-splitting of as-prepared CuCoO2 reached to 2.60 and 128.53 μmol/h g, respectively. In the three-electrode electrochemical cell with 1 M Na2SO4 electrolyte and zero-bias, the photocurrent density of CuCoO2 based photocathode reached to 20 μA/cm2. These findings prove that CuCoO2 has obvious advantages and great potential as a visible-light-driven photocatalyst. [ABSTRACT FROM AUTHOR]

The current low conversion efficiency of Cu2ZnSnS4 (CZTS)‐based thin film solar cells is mainly blamed on the high carrier recombination via interface states at the absorber‐buffer. In this work, ZnO1−xSx solid solution is exploited as the potential buffer layer materials to solve this issue by using density functional theory calculations. With the varying of solid solubility, the lattice constant of ZnO1−xSx solid solution follows the first‐order Vegard's Law, while its bandgap follows the second‐order Vegard's Law. Based on the systematical analysis of crystal structure and electronic properties of ZnO1−xSx solid solution, ZnO0.375S0.625 is screened as the optimal buffer layer material for CZTS‐based thin film solar cells, owing to the suitable bandgap (2.33 eV) and the smallest lattice mismatch (<7%). The CZTS/ZnO0.375S0.625 interface has less harmful interface state, small conduction band offset (−0.02 eV) and band bending (−0.23 eV). Moreover, its band alignment belongs to the staggered Type‐II heterojunction, and its built‐in electric field is in the same direction as the carrier migration, which is very favorable for the efficient separation and fast transfer of photogenerated carriers. Therefore, these interface features and effects of CZTS/ZnO0.375S0.625 heterojunction can significantly boost the photovoltaic performance of CZTS‐based thin film solar cells. [ABSTRACT FROM AUTHOR]

Aim: The pharmacokinetics and biodistribution of cisplatin encapsulated in polyphase liposome (KM-1) were compared with those of free drug in rats., Methods: The platinum levels in serum and normal organs, after a single dose of iv injection of free or encapsulated cisplatin to rats, were determined by induced coupled plasma atomic emission spectrometry., Results: Serum platinum concentration-time curve after a single iv dose of KM-1 4.5 mg/kg in rats was fitted with an open three-compartment model. The pharmacokinetic parameters were as follows: Vc=0.10 L/kg, T1/2pai=0.3 h, T1/2alpha=3.5 h, T1/2beta=2.7 h, AUC=265 mg.h.L(-1), and CL(s) =0.02 g.L.h(-1). KM-1 was cleared from the circulation much more slowly than free cisplatin. Liver and spleen had the highest concentration of platinum after KM-1 treatment., Conclusion: KM-1 remained in the bloodstream longer than its free drug, and was taken mainly by the reticuloendothelial system.