AI Chat Paper
Discover the SciOpen Platform and Achieve Your Research Goals with Ease.
Search articles, authors, keywords, DOl and etc.
{{expandStatus?'Exit ':''}}Advanced Search
Electron-hole separation is a critical step to achieving efficient photocatalysis, towards which use of co-catalysts has become a widely used strategy. Despite the tremendous efforts and demonstrated functions of noble metal co-catalysts, seeking noble metal-free co-catalysts will always be the goal when designing cost-effective, high-performance hybrid photocatalysts. In this work, we demonstrate that MoS2 nanosheets with 1T phase (i.e., octahedral phase) can function as a co-catalyst with multiple merits: (1) Noble-metal-free; (2) high mobility for charge transport; (3) high density of active sites for H2 evolution on basal planes; (4) good performance stability; (5) high light transparency. As demonstrated in both photocatalytic hydrogen production and Rhodamine B degradation, the developed hybrid structure with TiO2 exhibits excellent performance, in sharp contrast to bare TiO2 and the hybrid counterpart with 2H-MoS2.
Linsebigler, A. L.; Lu, G. Q.; Yates, J. T., Jr. Photocatalysis on TiO2 surfaces: Principles, mechanisms, and selected results. Chem. Rev. 1995, 95, 735-758.
Qu, Y. Q.; Duan, X. F. Progress, challenge and perspective of heterogeneous photocatalysts. Chem. Soc. Rev. 2013, 42, 2568-2580.
Yang, J. H.; Wang, D. E.; Han, H. X.; Li, C. Roles of cocatalysts in photocatalysis and photoelectrocatalysis. Acc. Chem. Res. 2013, 46, 1900-1909.
Trasatti, S. Work function, electronegativity, and electrochemical behaviour of metals. 3. Electrolytic hydrogen evolution in acid solutions. J. Electroanal. Chem. 1972, 39, 163-184.
Bao, N. Z.; Shen, L. M.; Takata, T.; Domen, K. Self-templated synthesis of nanoporous CdS nanostructures for highly efficient photocatalytic hydrogen production under visible light. Chem. Mater. 2008, 20, 110-117.
Xie, G. C.; Zhang, K.; Guo, B. D.; Liu, Q.; Fang, L.; Gong, J. R. Graphene-based materials for hydrogen generation from light-driven water splitting. Adv. Mater. 2013, 25, 3820-3839.
Zong. X.; Yan, H. J.; Wu, G. P.; Ma, G. J.; Wen, F. Y.; Wang, L.; Li, C. Enhancement of photocatalytic H2 evolution on CdS by loading MoS2 as cocatalyst under visible light irradiation. J. Am. Chem. Soc. 2008, 130, 7176-7177.
Bai, S.; Ge, J.; Wang, L. L.; Gong, M.; Deng, M. S.; Kong, Q.; Song, L.; Jiang. J.; Zhang, Q.; Luo, Y. et al. A unique semiconductor-metal-graphene stack design to harness charge flow for photocatalysis. Adv. Mater. 2014, 26, 5689-5695.
Li, Y. G.; Wang, H. L.; Xie, L. M.; Liang, Y. Y.; Hong, G. S.; Dai, H. J. MoS2 nanoparticles grown on graphene: An advanced catalyst for the hydrogen evolution reaction. J. Am. Chem. Soc. 2011, 133, 7296-7299.
Laursen, A. B.; Kegnæs, S.; Dahl, S.; Chorkendorff, I. Molybdenum sulfides-efficient and viable materials for electro- and photoelectrocatalytic hydrogen evolution. Energy Environ. Sci. 2012, 5, 5577-5591.
Jaramillo, T. F.; Jorgensen, K. P.; Bonde, J.; Nielsen, J. H.; Horch, S.; Chorkendorff, I. Identification of active edge sites for electrochemical H2 evolution from MoS2 nanocatalysts. Science 2007, 317, 100-102.
Meng, F. K.; Li, J. T.; Cushing, S. K.; Zhi, M. J.; Wu, N. Q. Solar hydrogen generation by nanoscale p-n junction of p-type molybdenum disulfide/n-type nitrogen-doped reduced graphene oxide. J. Am. Chem. Soc. 2013, 135, 10286-10289.
Xie, J. F.; Zhang, J. J.; Li, S.; Grote, F.; Zhang, X. D.; Zhang, H.; Wang, R. X.; Lei, Y.; Pan. B. C.; Xie, Y. Controllable disorder engineering in oxygen-incorporated MoS2 ultrathin nanosheets for efficient hydrogen evolution. J. Am. Chem. Soc. 2013, 135, 17881-17888.
Xiang, Q. J.; Yu, J. G.; Jaroniec, M. Synergetic effect of MoS2 and graphene as cocatalysts for enhanced photocatalytic H2 production activity of TiO2 nanoparticles. J. Am. Chem. Soc. 2012, 134, 6575-6578.
Chang, K.; Mei. Z. W.; Wang, T.; Kang, Q.; Ouyang, S. X.; Ye, J. H. MoS2/graphene cocatalyst for efficient photocatalytic H2 evolution under visible light irradiation. ACS Nano 2014, 8, 7078-7087.
Eda, G.; Yamaguchi, H.; Voriy, D.; Fujita, T.; Chen, M. W.; Chhowalla, M. Photoluminescence from chemically exfoliated MoS2. Nano Lett. 2011, 11, 5111-5116.
Voriy, D.; Salehi, M.; Silva, R.; Fujita, T.; Cheng, M. W.; Asefa, T.; Shenoy, V. B.; Eda, G.; Chhowalla, M. Conducting MoS2 nanosheets as catalysts for hydrogen evolution reaction. Nano Lett. 2013, 13, 6222-6227.
Lukowski, M. A.; Daniel, A. S.; Meng, F.; Forticaux, A.; Li, L. S.; Jin, S. Enhanced hydrogen evolution catalysis from chemically exfoliated metallic MoS2 nanosheets. J. Am. Chem. Soc. 2013, 135, 10274-10277.
Liang, Y. Y.; Wang, H. L.; Casalongue, H. S.; Chen, Z.; Dai, H. J. TiO2 nanocrystals grown on graphene as advanced photocatalytic hybrid materials. Nano Res. 2010, 3, 701-705.
Lin, Y. C.; Dumcenco, D. O.; Huang, Y. S.; Suenaga, K. Atomic mechanism of the semiconducting-to-metallic phase transition in single-layered MoS2. Nat. Nanotechnol. 2014, 9, 391-396.
Yuwen, L. H.; Xu, F.; Xue, B.; Luo, Z. M.; Zhang, Q.; Bao, B. Q.; Su. S.; Weng, L. X.; Huang, W.; Wang, L. H. General synthesis of noble metal (Au, Ag, Pd, Pt) nanocrystals modified MoS2 nanosheets and enhanced catalytic activity of Pd-MoS2 for methanol oxidation. Nanoscale 2014, 6, 5762-5769.
Wang, H. T.; Lu, Z. Y.; Xu, S. C.; Kong, D. S.; Cha, J. J.; Zheng, G. Y.; Hsu, P. C.; Yan, K.; Bradshaw, D.; Prinz, F. B. et al. Electrochemical tuning of vertically aligned MoS2 nanofilms and its application in improving hydrogen evolution reaction. Proc. Natl. Acad. Sci. USA 2013, 110, 19701-19706.
Yan, J. Q.; Wu, G. J.; Guan, N. J.; Li, L. D.; Li, Z. X.; Cao, X. Z. Understanding the effect of surface/bulk defects on the photocatalytic activity of TiO2: Anatase versus rutile. Phys. Chem. Chem. Phys. 2013, 15, 10978-10988.
King, L. A.; Zhao, W. J.; Chhowalla, M.; Riley, D. J.; Eda, G. Photoelectrochemical properties of chemically exfoliated MoS2. J. Mater. Chem. A 2013, 1, 8935-8941.
京公网安备11010802044758号