Hong Liu

Bio: Hong Liu is an academic researcher from Shandong University. The author has contributed to research in topics: Medicine & Materials science. The author has an hindex of 100, co-authored 1905 publications receiving 57561 citations. Previous affiliations of Hong Liu include Shanghai University & Guangzhou University.

Highly efficient photocatalytic H2 evolution from water over CdLa2S4/mesoporous g-C3N4 hybrids under visible light irradiation

Abstract: In this study, mesoporous graphitic carbon nitride (mpg-C 3 N 4 ) nanosheets with high surface area (317 m 2 g −1 ) were obtained by using SBA-15 as a hard-template, and CdLa 2 S 4 nanoparticles were successfully grown on these mpg-C 3 N 4 nanosheets via a facile hydrothermal method. The as-synthesized CdLa 2 S 4 /mpg-C 3 N 4 hybrids were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microcopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), N 2 adsorption-desorption, ultraviolet–visible diffuse reflection spectroscopy (DRS). Compared with pure CdLa 2 S 4 , the CdLa 2 S 4 /mpg-C 3 N 4 hybrid materials displayed higher photocatalytic H 2 evolution performance under the visible light (λ > 420 nm) using Na 2 S and Na 2 SO 3 as the sacrificial agent. The optimal content of mpg-C 3 N 4 was about 20 wt% and the corresponding photocatalytic H 2 evolution was 5984.8 μmol h −1 g −1 (with an apparent quantum efficiency of 7.1% at 420 nm), which was 7.7 times higher than that of pure CdLa 2 S 4 . The results of photoluminescence (PL) and photocurrent response demonstrated that the recombination of photo-generated electron-hole pairs was effectively inhibited due to the well-matched band structure and intimate contact interfaces of CdLa 2 S 4 and mpg-C 3 N 4 . Based on the results and analysis, a possible enhanced photocatalytic activity mechanism of CdLa 2 S 4 /mpg-C 3 N 4 composites was also proposed.

Microwave-assisted solvothermal synthesis of 3D carnation-like SnS2 nanostructures with high visible light photocatalytic activity

Abstract: Novel 3D carnation-flowerlike hexagonal SnS2 hierarchical structures have been successfully synthesized through a simple microwave-assisted solvothermal process. The as-prepared products were characterized by power X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), high-resolution transmission electron micrographs (HRTEM), selected area electron diffraction (SAED), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectra (DRS). The photocatalytic activity of the sample under visible-light irradiation (λ > 420 nm) was evaluated by the degradation of two different organic pollutants, rhodamine B (RhB) and phenol. The results reveal that the carnation-flowerlike SnS2 architectures show much higher photocatalytic activity than the SnS2 nanoparticles. The high catalytic performance of the SnS2 architectures comes from their hierarchical mesoporous structures, high BET surface area, high surface-to-volume ratios, and increased light absorbance. In addition, the SnS2 hierarchical architectures are stable during the photocatalytic reaction and can be used repeatedly.

I and i

Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A

Abstract: 抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。

The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets

Abstract: Ultrathin two-dimensional nanosheets of layered transition metal dichalcogenides (TMDs) are fundamentally and technologically intriguing. In contrast to the graphene sheet, they are chemically versatile. Mono- or few-layered TMDs - obtained either through exfoliation of bulk materials or bottom-up syntheses - are direct-gap semiconductors whose bandgap energy, as well as carrier type (n- or p-type), varies between compounds depending on their composition, structure and dimensionality. In this Review, we describe how the tunable electronic structure of TMDs makes them attractive for a variety of applications. They have been investigated as chemically active electrocatalysts for hydrogen evolution and hydrosulfurization, as well as electrically active materials in opto-electronics. Their morphologies and properties are also useful for energy storage applications such as electrodes for Li-ion batteries and supercapacitors.