Application of SrRuO3 Nanoparticles Supported with Reduced Graphene Oxide for Degradation of Thiophene Under Visible Light Irradiation

Journal of Inorganic and Organometallic Polymers and Materials - The existence of thiophene (TP) in fuel processing technology is considered a real threat to the environment. So the development of...     

Bi2O3-sensitized hierarchically mesoporous ZnO nanoparticles for Hg(II) reduction

Herein, an affordable and novel approach to design Bi₂O₃-sensitized hierarchically mesoporous ZnO nanoparticles (NPs) with a variety of Bi₂O₃ contents is achieved for Hg(II) reduction upon visible light exposure. TEM images of both ZnO and 3% Bi₂O₃/ZnO samples exhibit nanoscale spherical-like structures with a regular shape and a particle size of ~30 nm. The incorporation of Bi₂O₃ on hierarchically mesoporous ZnO networks allows visible light to be harvested in a broad range, and the mesoporous 3% Bi₂O₃/ZnO heterostructure demonstrates the best photocatalytic efficiency for Hg(II) reduction with a value of ~100% after 60 min. The photoreduction rate over the 3% Bi₂O₃/ZnO heterostructure is enhanced 10 and 20 times more than that of TiO₂-P25 and ZnO NPs. The rate constant of the 3% Bi₂O₃/ZnO heterostructure is 16.8 and 33.6 fold larger than that of TiO₂-P25 and ZnO NPs. The superior Hg(II) photoreduction performance could be ascribed to the synergistic effect, excellent visible-light harvest, large surface area, and pore volume provided by incorporating Bi₂O₃ and the heterojunction design between p-type Bi₂O₃ and n-type ZnO. This alignment of the electronic bands provides charge carrier separation, thereby decreasing the recombination rate. Finally, the mechanisms and kinetics for the photocatalytic reduction of Hg(II) are proposed.     

Pregnancy-induced severe left ventricular systolic dysfunction in a patient with hypertrophic cardiomyopathy

This paper reports the first case of hypertrophic cardiomyopathy (HCM) that developed postpartum congestive heart failure (CHF) and severe left ventricular (LV) systolic dysfunction. Review of the literature and clinical implications are discussed.     

Adaptive Motion Control of a Mobile Wheeled Robot Taking into Account the Nonideality of the Drives

Journal of Computer and Systems Sciences International - A method of mathematical modeling is used to study the controlled motion of a wheeled mobile robot in the presence of parametric...     

Z-scheme g-C3N4 nanosheet photocatalyst decorated with mesoporous CdS for the photoreduction of carbon dioxide

Herein, novel mesoporous CdS nanoparticle (NP)-incorporated porous g-C₃N₄ nanosheets with large surface areas and varying CdS NP percentages were constructed for the first time. The synergistic effect of mesoporous CdS NPs and porous g-C₃N₄ nanosheets indicated effective charge carrier separation and promoted CO₂ photoreduction to form CH₃OH upon illumination. The highest yield of CH₃OH over 3% CdS-g-C₃N₄ heterostructures was determined to be approximately 1735 μmol g^?1, which was 3.8- and 5.50 times greater than those of mesoporous CdS NPs and pristine g-C₃N₄ nanosheets, respectively. In addition, the mesoporous 3%CdS-g-C₃N₄ heterostructure showed an outstandingly enhanced CO₂ photoreduction rate of 192.7 μmol g^?1 h^?1, which was estimated to be ~4.1 and 5.9- times better than CdS (47.1 μmol g^?1 h^?1) and pristine g-C₃N₄ (32.6 μmol g^?1 h^?1), respectively. The photoreduction performance was retained at approximately 94.7% after five cycles of illumination for 45 h. The remarkable synthesized mesoporous CdS-g-C₃N₄ heterostructure played an essential role, with its narrow bandgap and high surface area enabling improved photoinduced carrier separation and a widened range of light absorption. A plausible mechanism for CO₂ photoreduction by the mesoporous CdS-g-C₃N₄ heterostructure was proposed and verified by photoelectrochemical and photoluminescence measurements.