Doping effect of phosphate in Bi 2 WO 6 and universal improved photocatalytic activity for removing various pollutants in water

Bimetallic Manganese Cobalt Phosphide Nanodots–Modified Graphitic Carbon Nitride for High‐Performance Hydrogen Production

“…After the modification of phosphide, the absorption edge of Mn 0.67 Co 1.33 P/g‐C 3 N 4 ‐5 sample exhibits a slight blue shift from 425.6 to 417.6 nm, but the visible light absorption is increased distinctly between 460 and 700 nm, which is beneficial for enhancing the photocatalytic performance. In addition, based on the Tauc formula, the band gap value of g‐C 3 N 4 and Mn 0.67 Co 1.33 P/g‐C 3 N 4 ‐5 samples are calculated to be 2.99 and 3.04 eV via plots of ( αhν ) 2 vs ( hν ), respectively (Figure b) . Furthermore, the valence band (VB) and the conduction band (CB) positions of g‐C 3 N 4 and Mn 0.67 Co 1.33 P/g‐C 3 N 4 ‐5 samples can be calculated by E VB = X − E e + 0.5 E g and E CB = E VB − E g , where E VB , E CB , X , E e , and E g are the VB potential, CB potential, the geometric average of the absolute electronegativity of the constituent atoms ( X value of g‐C 3 N 4 is 4.73 eV), the energy of free electrons on the hydrogen scale (4.5 eV vs normal hydrogen electrode [NHE]), and the band gap, respectively .…”

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

“…Bismuth tungstate Bi2WO6 (BWO) is the simplest member of the Aurivilius family and it is a very promising material due its potential applications in different areas such as photocatalysis [15,16], luminescence, chemical inertness, photo-stability, and environmentally friendly features [17][18][19][20]. The PANi with an extended π-conjugated electron, has recently showed great promises [21] as it is supporter for the large specific surface area and the excellent electronic conductivity due to its important intrinsically conducting polymers.…”

Self-Propagating Combustion Synthesis, Luminescent Properties and Photocatalytic Activities of Pure Ca12Al14O33: Tb3+(Sm3+)

“…After running 15 min, two samples all show the high degradation rates is more than 98% for removing dye MB, respectively, whose photocatalytic activities are obviously higher than that of bare Ca 12 Al 14 O 33 . Moreover, the kinetic curves of dye MB degradation can be approximated as the pseudo-first-order process (Dong et al, 2013, 2014a,b,c; Li et al, 2014, 2016). By plotting the ln( c 0 / c ) vs. time and making linear fitting for dynamic curves in Figures 8B, 9B the removal rate constants ( k ) of dye MB are estimated to be 0.186 and 0.167 min −1 , respectively, which is distinctly higher than that of bare Ca 12 Al 14 O 33 (0.131 min −1 ).…”

“…Moreover, according to the absorbance variations of dye MB solutions in Figures 8C, 9C in the photocatalytic reaction process, there are no shifting of the maximum absorption position of dye MB solution at 664 nm. In addition, the absorption peak at 293 nm in the ultraviolet range also vanishes, which implies that the benzene/heterocyclic rings of dye MB molecule may be completely decomposed, leading to the thorough mineralization of dye MB (Dong et al, 2013, 2014a,b,c; Li et al, 2014, 2016). Meanwhile, in order to investigate the reusability of the Ca 12 Al 14 O 33 : Tb 3+ and Ca 12 Al 14 O 33 : Sm 3+ samples, the circle degradation experiments of dye MB solution over the Ca 12 Al 14 O 33 : Tb 3+ and Ca 12 Al 14 O 33 : Sm 3+ samples are all performed.…”