Nanoparticles （NPs） with flower-like and frame morphologies were synthesized from CuS, a remarkable transition-metal sulfide. We introduced two kinds of CuS NPs into a nematic liquid crystal （LC） 4-cyano-4＇-n-pen...Nanoparticles （NPs） with flower-like and frame morphologies were synthesized from CuS, a remarkable transition-metal sulfide. We introduced two kinds of CuS NPs into a nematic liquid crystal （LC） 4-cyano-4＇-n-pentylbiphenyl （5CB） and investigated the morphology- and concentration-dependent alignment and electro-optic （E-O） effects of CuS NPs on 5CB. A trace amount of flower-like CuS NPs induced a uniform homeotropic orientation of LC molecules; this is attributable to the obtained desirable compact nanosheet structure. Moreover, both flower-like and frame CuS NPs induced a remarkable improvement in the E-O properties of 5CB, and the flower-like CuS/5CB system exhibited a better performance. The doped CuS NPs in the LC host suppressed the shielding effect and strengthened the electric field, resulting in outstanding E-O properties. At a doping concentration of 0.05 wt.%, CuS NPs were well-dispersed and achieved the optimum E-O performance. This study provides a novel method for inducing a uniform orientation and enhanced E-O properties of LC molecules by doping with extraordinary CuS NPs, leading to potential applications in establishing flexible LC displays.展开更多
To drive photoelectrochemical water splitting on porous BiVO4 photoanode,we herein prepared a carnationlike CuS powder by hydrothermal method and then loaded it onto BiVO4 photoelectrode.Expectedly,the CuS/BiVO4 compo...To drive photoelectrochemical water splitting on porous BiVO4 photoanode,we herein prepared a carnationlike CuS powder by hydrothermal method and then loaded it onto BiVO4 photoelectrode.Expectedly,the CuS/BiVO4 composite not only presents a higher photocurrent response value at 1.23 V versus RHE(reversible hydrogen electrode)than pure BiVO4 electrode under visible light irradiation,but also exhibits an excellent photoelectrochemical hydrogen production activity in comparison with either the BiVO4 or the CuS.The high ameliorated performance of CuS/BiVO4 composite may be due to the strong absorption of visible light and an effective abatement in combination of carriers.These results demonstrate an effective potential approach to design and construct efficient photoelectrochemical(PEC)systems.展开更多
文摘Nanoparticles （NPs） with flower-like and frame morphologies were synthesized from CuS, a remarkable transition-metal sulfide. We introduced two kinds of CuS NPs into a nematic liquid crystal （LC） 4-cyano-4＇-n-pentylbiphenyl （5CB） and investigated the morphology- and concentration-dependent alignment and electro-optic （E-O） effects of CuS NPs on 5CB. A trace amount of flower-like CuS NPs induced a uniform homeotropic orientation of LC molecules; this is attributable to the obtained desirable compact nanosheet structure. Moreover, both flower-like and frame CuS NPs induced a remarkable improvement in the E-O properties of 5CB, and the flower-like CuS/5CB system exhibited a better performance. The doped CuS NPs in the LC host suppressed the shielding effect and strengthened the electric field, resulting in outstanding E-O properties. At a doping concentration of 0.05 wt.%, CuS NPs were well-dispersed and achieved the optimum E-O performance. This study provides a novel method for inducing a uniform orientation and enhanced E-O properties of LC molecules by doping with extraordinary CuS NPs, leading to potential applications in establishing flexible LC displays.
基金financially supported by the National Natural Science Foundation of China (Nos. 21663027 and 21808189)the Natural Science Foundation of Gansu Province (No. 18JR3RA090)the Opening Project of Key Laboratory of Green Catalysis of Sichuan Institutes of High Education (No. LYJ18205)
文摘To drive photoelectrochemical water splitting on porous BiVO4 photoanode,we herein prepared a carnationlike CuS powder by hydrothermal method and then loaded it onto BiVO4 photoelectrode.Expectedly,the CuS/BiVO4 composite not only presents a higher photocurrent response value at 1.23 V versus RHE(reversible hydrogen electrode)than pure BiVO4 electrode under visible light irradiation,but also exhibits an excellent photoelectrochemical hydrogen production activity in comparison with either the BiVO4 or the CuS.The high ameliorated performance of CuS/BiVO4 composite may be due to the strong absorption of visible light and an effective abatement in combination of carriers.These results demonstrate an effective potential approach to design and construct efficient photoelectrochemical(PEC)systems.
