“…Construction of heterostructured semiconductor systems with well-matched band energies offers new opportunities to enhance spatial charge separations and ultimately boost photoelectrochemical properties. [8] Recently, various narrow bandgap semiconductors capable of absorbing visible light of solar spectrum have been composited with TiO 2 and ZnO to form heterojunctions for improving PCP performances, such as In 2 S 3 , [4] CdS, [9] Bi 2 S 3, [10] Sb 2 S 3 , [11] ZnIn 2 S 4 , [12] AgInSe 2 , [13] BiVO 4 , [14] TpBD-COF, [15] MoS 2 , [16] FeS 2 , [17] etc. In the meanwhile, geometric advantages of nanowire arrays over planar films have been demonstrated in the photoelectrochemical fields.…”