fields. Photocatalytic CO 2 reduction over photocatalysts is a promising approach to overcome these two crises. [1][2][3][4][5][6][7] This approach can recycle CO 2 back to rene wable fuels by using solar energy which is green and inexhaustible. [8][9][10][11][12][13][14] TiO 2 has widely been utilized for photocata lytic CO 2 reduction owing to its stability, nontoxicity, and earth abundance, [15][16][17][18][19][20] but suffers from rapid recombination of electronhole pairs [21][22][23] and large bandgap. [24][25][26] Some strategies were developed to improve the photocata lytic performance including noble metal deposition, [27][28][29][30] doping, [31,32] surface photosensitization, [33,34] and constructing heterojunctions. [35][36][37][38][39] Among them, coupling TiO 2 with narrowband semi conductors is regarded as an efficient way to enhance separation of electron-hole pairs and promote light absorption, such as CdSe, [40,41] CdTe, [42,43] MoS 2 , [44][45][46][47] and CdS. [48][49][50] As a family member of the 2D materials family, transition metal dichal cogenides (TMDs) have recently attracted much attention owing to their remark able optical and electronic properties. As a typical TMD material, MoS 2 has been the subject of a large amount of research in electronic devices, electrochemistry and photocatalysis. [51][52][53][54] MoS 2 has a narrow bandgap around 1.2 eV and its conduction band (CB) level can be facilely adjusted by altering its number of layers due to quantum confinement, [55,56] which makes MoS 2 a highly promising sensitizer for photocatalysis processes, such as hydrogen evolution and CO 2 reduction. Recently, TiO 2 /MoS 2 has been reported for photocatalytic oxidation, photocatalytic H 2 pro duction, and photovoltaics, however, photocatalytic CO 2 con version to solar fuels over fibrous TiO 2 /MoS 2 has barely been reported.Herein, 1D/2D TiO 2 /MoS 2 hybrid nanofibers have been prepared by in situ growing MoS 2 nanosheets onto TiO 2 nanofibers. Such hybrid nanofibers exhibit abundantly porous structure, improved light absorption, and enhanced charge separation over photoexcitation. Therefore, the 1D/2D hybrid shows a superior photocatalytic activity for photoreducing CO 2 into hydrocarbons under UV-visible light irradiation. The synergistic effect of MoS 2 deposition onto TiO 2 fiber is analyzed and discussed in detail to understand the photocatalytic mechanism.Photocatalytic reduction of CO 2 into solar fuels is recognized an attractive approach to solve the environmental and energy crisis. MoS 2 , a type of 2D transition metal dichalcogenides, has attracted significant attention in photoelectronics, sensors and photo/electrocatalytic water splitting owing to its remarkable properties. Nevertheless, to date, MoS 2 is barely used as (co)catalyst for CO 2 photoreduction. Herein, novel 1D/2D TiO 2 /MoS 2 nanostructured hybrid with TiO 2 fibers covered by MoS 2 nanosheets by hydrothermal transformation method is fabricated. The MoS 2 sheet arrays show a lateral size of ≈80 nm and a thickness...
