Carbon nano-layer coated TiO2 nanoparticles for efficient photocatalytic CO2 reduction into CH4 and CO

Visible light responsive metalloporphyrin-sensitized TiO2 nanotube arrays for artificial photosynthesis of methane

“…[10][11][12][13][14] However, it exhibits poor performance in CO 2 reduction, because the sensitivity of TiO 2 was limited to only the UV light region. [15][16][17] To use the complete solar spectrum, various strategies have been applied, such as metal doping, [18][19][20] non-metal doping, [21][22][23][24][25][26] sensitization [27][28][29][30] and semiconductor coupling. 31,32 However, the combination of organic sensitizers and TiO 2 is the best choice for the preparation of high-efficiency photocatalysts.…”

Ni(II) Tetra(4-carboxylphenyl)porphyrin-Sensitized TiO2 Nanotube Array Composite for Efficient Photocatalytic Reduction of CO2

“…Various photocatalysts such as semiconductor photocatalysts, , molecular sieve photocatalysts, nanobelt photocatalysts, organic photocatalysts, and biological enzyme catalysts have been developed into catalysts for effective reduction of CO 2 . Among many photocatalysts, the TiO 2 photocatalyst has become the most widely studied photocatalytic material due to its high photocatalytic activity, safety and nontoxicity, strong corrosion resistance, high stability, and low cost. , However, TiO 2 exhibits photocatalytic activity only under ultraviolet light and has disadvantages such as rapid electron–hole recombination. , To improve the performance of TiO 2 -based photocatalysts, the most commonly used modification methods include semiconductor coupling, , metal , and nonmetal doping, , and photosensitization. , Among them, the photosensitizer can efficiently increase the performance of TiO 2 , making it highly sensitive to visible light. For the photoreduction of CO 2 , porphyrin and its derivatives have inherent advantages in plant photosynthesis and can also enhance the fixation and transformation of CO 2 . − Gao et al prepared a TiO 2 nanosheet/tetra (4-carboxyphenyl) porphyrin (TiO 2 NSs/TCPP) hybrid for CO 2 photoreduction.…”

“…18,19 People's interest in this field of research began with the work of Fujishima and Honda in 1972. 20 Various photocatalysts such as semiconductor photocatalysts, 21,22 molecular sieve photocatalysts, 23 nanobelt photocatalysts, 24 organic photocatalysts, 25 and biological enzyme catalysts 26 have been developed into catalysts for effective reduction of CO 2 . Among many photocatalysts, the TiO 2 photocatalyst has become the most widely studied photocatalytic material due to its high photocatalytic activity, safety and nontoxicity, strong corrosion resistance, high stability, and low cost.…”

“…27,28 However, TiO 2 exhibits photocatalytic activity only under ultraviolet light and has disadvantages such as rapid electron−hole recombination. 21,29 To improve the performance of TiO 2based photocatalysts, the most commonly used modification methods include semiconductor coupling, 30,31 nonmetal doping, 34,35 and photosensitization. 36,37 Among them, the photosensitizer can efficiently increase the performance of TiO 2 , making it highly sensitive to visible light.…”

Construction of the Sn-doped defect pyrochlore oxide KNbMoO6·H2O/g-C3N4 composite and its photocatalytic reduction of CO2

“…[3][4][5] Among them, photocatalytic CO 2 conversion is considered to be a typical low-energy consumption technology. 6,7 In recent years, a variety of semiconductor materials have been reported for the photocatalytic conversion of CO 2 , such as TiO 2 , ZrO 2 , Bi 2 WO 6 and Zn 2 GeO 4 . [8][9][10][11] Unfortunately, the quantum efficiency of many traditional semiconductor photocatalysts is still very low, which limits their practical application.…”