Quaternary CZTS nanoparticle decorated CeO₂ as a noble metal free p–n heterojunction photocatalyst for efficient hydrogen evolution

Abstract

Practical implementation of photocatalytic hydrogen production has been required for the invention of efficient visible light absorption and low cost photocatalyst materials.

Kesterite Cu 2 ZnSnS 4 thin films synthesized utilizing electrodeposition: Influence of metal doping on the properties

“…The XPS analysis detected the existence of S, Zn, Cu, and Sn elements in the CZTS‐Na sample. As shown in the detailed XPS images in Figure 7A‐D, the Cu 2p core spectra had two peaks appear at 953.37 and 933.67 eV with a splitting of 19.7 eV, implying that Cu exists in its Cu + oxidation state 37 . The Zn2p peaks detected at 1042.81 and 1020.31 eV had an orbit of 22.49 EV indicative of the oxidation states of Zn 2+.…”

“…The XPS peaks demonstrated an XPS line of C1 s 7A-D, the Cu 2p core spectra had two peaks appear at 953.37 and 933.67 eV with a splitting of 19.7 eV, implying that Cu exists in its Cu + oxidation state. 37 The Zn2p peaks detected at 1042.81 and 1020.31 eV had an orbit of 22.49 EV indicative of the oxidation states of Zn 2+.38 The peaks at 494.95 eV and 486.55 eV corresponded to the binding energy of Sn (IV),with a spike at 8.4 eV which is nearly compatible with that of Sn 4+ in CZTS alloy films. 39 The S 2p peaks displayed peaks at 167.16 and 164.08 eV with a spike at 3.08 eV, demonstrating the presence of sulfur state in the CZTS.…”

A Review on Ceo2‐Based Electrocatalyst and Photocatalyst in Energy Conversion

“…A quaternary Cu 2 ZnSnS 4 nanoparticle decorated CeO 2 pn heterojunction was reported by Sridharan et al, which reaches hydrogen production efficiency of 2930 μmolg −1 h −1 . [ 123 ] CeO 2 coupled Cu 2 ZnSnS 4 induces the visible light absorption and separation, the transmission of photoinduced charge carriers, as well as impedes the rapid electron–hole pair recombinations. Wang et al designed 0D/2D Mn 0.2 Cd 0.8 S/CeO 2 directed Z‐scheme and photocatalytic H 2 production rate of 8.73 mmolg −1 h −1 was obtained in Na 2 S/Na 2 SO 3 aqueous solution.…”

Hydroxyapatite integrated with cellulose acetate/polyetherimide composite membrane for biomedical applications

“…Because of their high surface area, morphology, structure, durability, and good adsorption properties, several photocatalytic nanomaterials such as TiO2, ZnO, CuO, HA, or some metals, such as Au, Ag, Pt, Pd NPs, have been found to be suitable for photocatalytic degradation of organic pollutants. [9][10][11] The hydroxyapatite (HA) nanoparticle [Ca 10 (PO 10 ) 6 (OH) 2 ] is a naturally occurring calcium apatite that is a major component of human bones and teeth, and it can establish bonds with organic molecules on its own. 12 The combination of exceptional qualities in particular bioactivity, biocompatibilities, osteoconductivity, noninflammatory, and mechanical properties, as a result of its unique chemical composition and crystal arrangement, makes it considerably employed in biomedical applications.…”