A New Photocatalyst of RuO2-loaded PbWO4 for Overall Splitting of Water

Abstract

Lead tungstate, PbWO4, with a tetragonal structure was found to make a stable photocatalyst for the decomposition of water to produce H2 and O2 when combined with RuO2. This is the first example of tungsten oxide that is photocatalytically active for the reaction. The structural feature of PbWO4 is the presence of tetrahedral WO4. The DFT calculation showed that Pb2+ with d10s2 electronic configuration had significant influences on both valence and conduction band structures.

Hydrothermal preparation and photocatalytic water splitting properties of ZrW2O8

“…By far, a lot of Ti 4＋ , Nb 5＋ and Ta 5＋ based metal oxides with suitable band structure have been developed for photocatalytic water splitting [2][3][4][5][6] . However, the reports on Zr 4＋ or W 6＋ based metal oxides for water splitting are still limited [7][8][9][10][11][12][13] . ZrW 2 O 8 was a binary oxide in the ZrO 2 -WO 3 system [14] .…”

Effects of Distortion of Metal–Oxygen Octahedra on Photocatalytic Water‐Splitting Performance of RuO2‐Loaded Niobium and Tantalum Phosphate Bronzes

“…One group consists of transition metal oxides, including various titanates [TiO 2 , [1] SrTiO 3 , [2] A 2 Ti 6 O 13 (A = Na, K, Rb), [3,4] BaTi 4 O 9 , [5,6] A 2 La 2 Ti 3 O 10 (A = K, Rb, Cs), [7,8] Na 2 Ti 3 O 7 , [9] K 2 Ti 4 O 9 [10] ], zirconium oxide (ZrO 2 [11] ) niobates [A 4 Nb 6 O 17 (A = K, Rb), [12] Sr 2 Nb 2 O 7 , [13] Cs 2 Nb 4 O 11 , [14] Ba 5 Nb 4 O 15 [15] ], tantalates [ATaO 3 (A = Na, K), [16,17] MTa 2 O 6 (M = Ca, Sr, Ba], [18,19] Sr 2 Ta 2 O 7 , [13] ACa 2 Ta 3 O 10 (A=H, Na, Ca), [20] A 2 SrTa 2 O 7 ·n H 2 O (A= H, K, Rb), [21] ALnTa 2 O 7 (A = H, Na, Rb, Cs; Ln = La, Pr, Nd, Sm), [22] K 3 Ta 3 B 2 O 12 , [23] Ba 5 Ta 4 O 15 [24] ], and tungstates (PbWO 4 , [25,26] Pb x WO 4 [27] ). The other group is made up of typical metal oxides that consist of various indates [MIn 2 O 4 (M = Ca, Sr), [28][29][30] AInO 2 (A = Li, Na), [31] LaInO 3 [30] ], gallates [Ga 2 O 3 , [32] ZnGa 2 O 4 , [33] MGa 2 O 4 (M = Ca,Sr)], germanate (Zn 2 GeO 4 [34] ), stannates [M 2 SnO 4 (M = Ca, Sr) [28] ], and antimonates [NaSbO 3 , [28,…”

An overview on water splitting photocatalysts

“…Ti 4+ , Zr 4+ , Nb 5+ , Ta 5+ or W 6+ ) [21][22][23][24][25][26][27], metal oxides containing d 10 electronic configuration metal ions (i.e. Ga 3+ , In 3+ , Ge 4+ , Sn 4+ or Sb 5+ ) [28][29][30][31][32][33][34][35] as well as metal nitrides with d 10 electronic configuration [36][37][38][39] have been prepared as active ultraviolet (UV)-light-induced photocatalysts for water splitting. Doping [40][41][42][43][44] or dye-sensitization [45][46][47][48] on the photocatalysts is revealed beneficial for the occurrence of visible-light-induced photocatalytic processes.…”