Visible Light-Driven Chemistry of Oxalic Acid in Solid Argon, Probed by Raman Spectroscopy

2013 ◽  
Vol 117 (7) ◽  
pp. 1492-1502 ◽  
Author(s):  
Adriana Olbert-Majkut ◽  
Jussi Ahokas ◽  
Mika Pettersson ◽  
Jan Lundell
Keyword(s):  
Raman Spectroscopy ◽  
Oxalic Acid ◽  
Visible Light ◽  
Visible Light Driven ◽  
Solid Argon

scholarly journals Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO4Photocatalyst

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Kanlaya Pingmuang ◽  
Natda Wetchakun ◽  
Wiyong Kangwansupamonkon ◽  
Kontad Ounnunkad ◽  
Burapat Inceesungvorn ◽  
...  
Keyword(s):  
Oxalic Acid ◽  
Visible Light ◽  
Malonic Acid ◽  
Area Measurement ◽  
Spherical Particles ◽  
X Ray ◽  
First Order ◽  
Order Rate ◽  
Visible Light Driven ◽  
Pseudo First Order

Au/BiVO4visible-light-driven photocatalysts were synthesized by coprecipitation method in the presence of sodium dodecyl benzene sulfonate (SDBS) as a dispersant. Physical characterization of the obtained materials was carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), UV-Vis diffuse reflectance spectroscopy (DRS) and Brunauer, and Emmett and Teller (BET) specific surface area measurement. Photocatalytic performances of the as-prepared Au/BiVO4have also been evaluated via mineralizations of oxalic acid and malonic acid under visible light irradiation. XRD and SEM results indicated that Au/BiVO4photocatalysts were of almost spherical particles with scheelite-monoclinic phase. Photocatalytic results showed that all Au/BiVO4samples exhibited higher oxalic acid mineralization rate than that of pure BiVO4, probably due to a decrease of BiVO4band gap energy and the presence of surface plasmon absorption upon loading BiVO4with Au as evidenced from UV-Vis DRS results. The nominal Au loading amount of 0.25 mol% provided the highest pseudo-first-order rate constant of 0.0487 min−1and 0.0082 min−1for degradations of oxalic acid (C2) and malonic acid (C3), respectively. By considering structures of the two acids, lower pseudo-first-order rate constantly obtained in the case of malonic acid degradation was likely due to an increased complexity of the degradation mechanism of the longer chain acid.

scholarly journals Rodlike AgI/Ag2Mo2O7 Heterojunctions with Enhanced Visible-Light-Driven Photocatalytic Activity

ACS Omega ◽  
2019 ◽  
Vol 4 (5) ◽  
pp. 7919-7930 ◽  
Author(s):  
Zhongyi Jiao ◽  
Zhendong Liu ◽  
Zhen Ma
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Driven
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