《Table 1Pore structure parameters of the samples.》

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《双助剂促进g-C_3N_4光解水制氢性能（英文）》

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In order to further investigate the separation and migration of charge carriers during photocatalytic water splitting，we performed Brunauer-Emmett-Teller（BET），PL，and PEC analyses.The N2 adsorption-desorption isotherms of the catalysts were obtained in order to evaluate the surface area and porous structures of the materials.As depicted in Fig.9，it is quite clear that all the composites exhibit classical type-IV curves with H3adsorption hysteresis loops，demonstrating the presence of mesopores in the composites.Table 1 shows the corresponding surface area and porous structure parameters.Compared with g-C3N4，the 1.0-Ag/CN and 10-NiS/CN composites have larger specific surface areas（SBET）[3].This may be caused by Ag and Ni S decorating the g-C3N4，resulting in nanolayer and porous structures[69].However，the 10-NiS/1.0-Ag/CN composite has a smaller surface area and pore volume than the binary composites.It is evident that the surface area，total pore volume，and pore size decrease because NiS may partially fill the pores in1.0-Ag/CN[42，43，60].These data clearly demonstrate that surface area does not play a key role in the improved photocatalytic activity observed in this study.