Remarkably Stabilized Charge Separations in Inorganic Nanospace

Abstract

A remarkably stable and continuous photoinduced charge separation with a half lifetime longer than 2.5 h in ambient atmosphere was observed at the interface of mesoporous silica and titania nanosheets involving porphyrins and viologen in their nanospaces, respectively.

Photochemical Reduction of CO2 Using TiO2: Effects of Organic Adsorbates on TiO2 and Deposition of Pd onto TiO2

“…Ever since photocatalysis by semiconductors was reported by Honda and Fujishima’s group, its application in converting solar light to chemical energy has been an attractive research field. − In particular, photocatalysts for stoichiometric water splitting to make hydrogen have been the subject of a lot of attention − because of the serious problem of the shortage of fossil fuels. Although the reduction of CO 2 using semiconductors such as TiO 2 as a photocatalyst was also reported by Fujishima and his co-workers in 1979, the progress achieved in this field had not been as dramatic as that in hydrogen evolution for a few decades because of the low reaction efficiencies. ,− Recently, however, photocatalytic reduction of CO 2 has attracted considerable attention again because this is a potentially applicable technology to utilization of CO 2 using solar light. − …”

Photocatalytic reduction of CO2 over exposed-crystal-face-controlled TiO2 nanorod having a brookite phase with co-catalyst loading

“…Practical application of photocatalysts in converting solar light to chemical energy has been an attractive research field [1][2][3][4][5][6][7][8][9][10][11]. Water splitting over photoirradiated semiconductor photocatalysts has become an important issue world wide [12][13][14][15][16][17][18][19][20] because hydrogen is a promising alternative fuel when fossil fuels become depleted.…”

<em>In Situ</em> Synthesis of Gold Nanoparticles without Aggregation in the Interlayer Space of Layered Titanate Transparent Films

“…On the other hand, layered metal oxide semiconductors (LMOSs) exhibit photocatalytic properties and have a large surface area, typically several hundred square meters per unit g of an LMOS [15][16][17] . In addition, various LMOSs have intercalation properties (i.e., various chemical species can be accommodated within their expandable and large interlayer spaces) [15][16][17][18][19][20] . Thus, with a combination of MNPs and LMOSs, it is expected that relatively large amounts of MNPs are hybridized with the semiconductor photocatalysts.…”

“…We have reported the first in situ synthesis of copper nanoparticles (CuNPs) 21 within the interlayer space of LMOS (titania nanosheet; TNS [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] ) transparent films through very simple steps. However, the details of the synthetic procedures and the characterization of the other noble MNPs and TNS hybrids have not yet been reported.…”