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Porous thin films of Bi 2 O 3 /Bi 2 S 3 nanocomposite semiconductors were prepared rapidly at gas/liquid interface for the first time by contacting an acidic Bi(NO 3 ) 3 solution with vapors from ammonia water and ammonium sulfide solution. Hydrolysis of Bi 3+ into Bi 2 O 3 nanoparticles (NPs) and their partial sulfurization into...
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