Supporting information
Construction of Inorganic Nanoparticles by Micro-nano-porous Structure of Cellulose Matrix
Shilin Liu, Dingning Ke, Jian Zeng, Jinping Zhou, Tianyou Peng and Lina Zhang*
Department of Chemistry, Wuhan University, Wuhan 430072, China
Figure S1. FT-IR spectra of the cellulose films and the composite films ( a ), and powder X-ray diffraction pattern of the RC and CdS/cellulose composite films ( b ).
Figure S2. Weight loss ( in percentage of the initial weight ) and differential thermogravimetry analysis ( DTG ) curves as a function of temperature for the composite films ( a ), and X-ray diffraction patterns of the resulting inorganic nanoparticles after removal of cellulose matrix by calcinations at 450 and 600 oC ( b ).
As shown in Figure S1a, there are two peaks that correspond to the decomposition temperature of the amorphous ( 300 - 350 oC ) and crystalline regions ( 450 - 520 oC ) of cellulose in the DTG curves. Figure S1b shows the composite films sintered in muffle furnace at air atmosphere at 450 and 600 oC. When the calcination temperature was 450 oC, the obtained materials was amorphous carbon coated CdS with trace CdO. While the composite films were sintered at 600 oC, the materials changed to CdO. It has been indicated that the decomposing temperature of bulk CdS at air atmosphere was about 500 oC, and the decrease particle size often results in a decrease in the thermal stability. Therefore, the content of CdS in the cellulose films can be calculated by using the following equation:
where WCdS is the content of CdS, WCdO is the content of the CdO obtained from TG at 600 oC, MCdS and MCdO are the molar mass of the corresponding CdS and CdO.
Figure S3. Effect of the Pt-loading content on H2 evolution rate of CD-005 ( 3 cm × 1 cm ) in an aqueous solution containing 0.35 M Na2S/0.25 M Na2SO3 for 2 h irradiation.
Figure S4. Time course of hydrogen yield over Pt-loaded composite films. All reactions were performed on a piece of composite films ( 3 cm × 1 cm with 5 % Pt loading ) in an aqueous solution containing 0.25 M Na2SO3 and 0.35 M Na2S under visible light irradiation.
1