Meso-tetra(4-sulfonatophenyl)porphyrin silver/Ag nanoparticles/graphene-phase CN with a sandwich-like structure and double-faced active centers two-step room-temperature photocatalytic synthesis for ractopamine detection.

Photochemical synthesis under visible light irradiation is a novel approach in the field of green chemistry, and composites with abundant active centers for electrochemical detection are highly attractive. Herein, a meso-tetra(4-sulfonatophenyl)porphyrin silver/Ag nanoparticles/graphene phase CN nanosheets (AgTPPS/AgNPs/ng-CN) material with a sandwich-like structure was synthesized using a two-step photocatalytic reaction at room temperature (25 °C). In the first visible light irradiation step and in the presence of a hole capture agent, Ag ions were photocatalytically reduced onto the surface of ng-CN that was used as a photocatalyst.

Photocatalytic reduction for graphene oxide by PbTiO with high polarizability and its electrocatalytic application in pyrrole detection.

Quick recombination of photogenerated electrons and holes in photocatalytic process remains a huge challenge. And the routine efforts are concentrated on heterojunction, metal decoration and surface defect strategies. PbTiO as a typical perovskite ferroelectrics is with a strong built-inelectric field as self-junction caused by internal spontaneous polarization, facilitating the charge separation in the photocatalytic process.