1 research outputs found
Highly Efficient Visible-Light-Driven Photocatalytic Hydrogen Production on CdS/Cu<sub>7</sub>S<sub>4</sub>/g‑C<sub>3</sub>N<sub>4</sub> Ternary Heterostructures
Hydrogen
production through photocatalytic water splitting has attracted much
attention because of its potential to solve the issues of environmental
pollution and energy shortage. In this work, CdS/Cu<sub>7</sub>S<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> ternary heterostructures are
fabricated by ion exchange between CdS and Cu<sup>+</sup> and subsequent
ultrasonication-assisted self-assembly of CdS/Cu<sub>7</sub>S<sub>4</sub> and g-C<sub>3</sub>N<sub>4</sub>, which provide excellent
visible-light photocatalytic activity for hydrogen evolution without
any noble metal cocatalyst. With the presence of p–n junction,
tuned band gap alignments, and higher charge carrier density in the
CdS/Cu<sub>7</sub>S<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> ternary
heterostructures that can effectively promote the spatial separation
and prolong the lifetime of photogenerated electrons, a high hydrogen
evolution rate of 3570 μmol g<sup>–1</sup> h<sup>–1</sup>, an apparent quantum yield of 4.4% at 420 nm, and remarkable recycling
stability are achieved. We believe that the as-synthesized CdS/Cu<sub>7</sub>S<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> ternary heterostructures
can be promising noble metal-free catalysts for enhanced hydrogen
production from photocatalytic water splitting