Yan Li,Xue Li,Xiao-Tian Wang,Li-Juan Jian,Nihad Ibrahim Mohammed Abdallah,Xiao-Fei Dong,Cheng-Wei Wang
Constructing high efficient nanostructured photocatalysts is meaningful for dyeing wastewater treatment . Herein, a new p-n heterostructured photocatalyst of NiS/BiVO 4 (NiS/BVO) was well designed, synthesized and applied to photodegrade anion organic dye. Coupling p-type NiS nanoparticles on n-type decahedral nanostructured BVO cannot obviously increase the specific surface area , but can effectively increase the light harvesting, enhance the photocurrent response, and promote the separation and transfer of the photo-generated electron-holes. As a result, 0.7 molar ratio of NiS/BVO exhibited the best photocatalytic capability of 95.6 % within 90 min irradiation, possessing the highest degradation rate of 1.7970 h −1 , which is almost 16 and 33 times higher than pure BVO (15.8 %, 0.1134 h −1 ) and NiS (7.9 %, 0.0543 h −1 ). Meanwhile, NiS/BVO has well photocatalytic stability in at least five cycling tests.
Houde She,Man Jiang,Pengfei Yue,Jingwei Huang,Lei Wang,Jianzhang Li,Gangqiang Zhu,Qizhao Wang
The performance of BiVO 4 for photoelectrocatalytic (PEC) water decomposition is commonly limited by reaction kinetics. In this work, NiS and CoS nanospheres were respectively loaded on BiVO 4 thin films (NiS/BiVO 4 and CoS/BiVO 4 composites) to improve its reaction kinetics for PEC water decomposition. Both physical and chemical properties of these composites were characterized by XRD , SEM, TEM, PL and UV-DRS. The photoelectric properties of the samples were verified by testing LSV , i-t, EIS and IPCE. The formation of the composites can effectively prevent the recombination of carriers and consequently accelerate the separation of electrons and holes. NiS/BiVO 4 and CoS/BiVO 4 can reach photocurrent of 2.1 mA cm −2 and 2.7 mA cm −2 under light respectively, at 1.23 V vs. RHE, which are 1.75 times and 2.25 times that of BiVO 4 (1.2 mA cm −2 ). The hydrogen production of the NiS/BiVO 4 and CoS/BiVO 4 photoanodes was 4.7 and 7.3 times higher than that of BiVO 4 photoanode, respectively.
危险品化学品经营许可证（带存储）