Controllable Crystal Growth and Improved Photocatalytic Activity of Porous Bi₂O₃–Bi₂S₃ Composite Sheets

Porous Bi2O3–Bi2S3 composite sheets were constructed through a combinational methodology of chemical bath deposition and hydrothermal reaction. The Na2S precursor concentration in the solution was varied to understand correlation between vulcanization degree structure evolution porous sheets. control etching rate Bi2O3 sheet template regrowth Bi2S3 crystallites via suitable sulfide during reaction utilizes formation Due presence composites, improved visible-light absorption ability separation efficiency photogenerated charge carriers are achieved. Furthermore, as-synthesized obtained from with 0.01M display highly enhanced photocatalytic degradation toward methyl orange (MO) dyes compared pristine Bi2S3. system shows high surface active sites, fast transfer, high-efficiency photoinduced carriers, redox capacity concerning their constituent counterparts. This study affords promising approach constructing Bi2O3-based Z-scheme composites microstructure Bi2O3/Bi2S3 phase ratio for photoactive device applications.