Ag3PO4/In(OH)(3) Composite Photocatalysts with Adjustable Surface-Electric Property for Efficient Photodegradation of Organic Dyes under Simulated Solar-Light Irradiation

作者：Guo Jianjun; Ouyang Shuxin^*; Zhou Han; Kako Tetsuya; Ye Jinhua

来源：Journal of Physical Chemistry C, 2013, 117(34): 17716-17724.

DOI：10.1021/jp4062972

A new composite photocatalyst Ag3PO4/In(OH)(3) was successfully synthesized via in-situ precipitation method and applied to eliminate Rhodamine B under the irradiation of solar simulator. The composite photocatalysts exhibited higher activities than that of individual Ag3PO4 and In(OH)(3), and the highest activity (the rate constant k(app) = 1.75 min(-1)) was observed over the Ag3PO4/In(OH)(3) with a molar ratio of 1.65:1.00. The further mechanism study and material characterizations indicated that the photocatalytic activity is closely related to the surface-electric property of the composite photocatalyst. Moreover, the surface-electric property could be continually adjusted by changing the content of In(OH)(3). The photo-sensitization and the intrinsic photocatalytic degradation of Rh B were investigated under 540 +/- 12 and 420 +/- 12 nm monochromatic irradiation, respectively. The results indicated that the intrinsic photocatalytic degradation of Rh B dominated the overall degradation under the solar light irradiation. The energy-band structure of the composite photocatalyst was also investigated and considered as a reason for the enhanced multielectron reactions. Here, the composite photocatalysts with adjustable surface-electric property and suitable energy-band structure reveal a material design concept of exploiting a new photocatalyst based on the reaction kinetics and thermodynamics.

• 出版日期2013-8-29
• 单位天津大学