Aqueous synthesis of protectant-free copper nanocubes by a disproportionation reaction of Cu₂O on synthetic saponite

Abstract

Here, we report a synthesis of Cu nanocubes by photoreduction of CuSO4. Because synthetic saponite (one of the layered clay minerals) was used as the adsorbent, the nanocubes contained no capping agents or protectants, and the disproportionation reaction of Cu2O with H2SO4 was found to be the key for morphological control.

Catalytic Activity of Nonaggregating Cu Nanoparticles Supported in Pores of Zeolite for Aerobic Oxidation of Benzyl Alcohol

“…Therefore, slow reduction may be the key to synthesis in pores of zeolite. To this end, the photoreduction method for Cu ions can be expected to be a promising candidate because the photoreduction tends to be slow …”

“…In this study, we synthesized nonaggregating Cu NPs in pores of zeolite by the combination of ion-exchange and photoreduction methods. ,− Y-type zeolite, which has a relatively large pore size of ∼0.9 nm, was used because the size of acetate ions as the trigger of photoreduction by n-π* transition is smaller than the pore size of Y-type zeolite . We also investigated their catalytic activity for the aerobic oxidation of benzyl alcohol.…”

Thermoelectric Properties of PEDOT:PSS Containing Connected Copper Selenide Nanowires Synthesized by the Photoreduction Method

“…In previous reports, we demonstrated the synthesis of size-controlled Cu nanoparticles by the photoreduction method, 40 − 43 where the slow reaction can control the morphology of copper nanoparticles. 42 We applied the above method to the synthesis of α-Cu 2 Se NWs. The slow reaction can be expected to control the Cu vacancies, leading to the synthesis of Cu 2 Se NWs.…”

“…In this study, we synthesized α-Cu 2 Se NWs by the photoreduction method and evaluated the thermoelectric properties of PEDOT:PSS/Cu 2 Se NW composite thin films with various amounts of Cu 2 Se NWs. In previous reports, we demonstrated the synthesis of size-controlled Cu nanoparticles by the photoreduction method, − where the slow reaction can control the morphology of copper nanoparticles . We applied the above method to the synthesis of α-Cu 2 Se NWs.…”

“…39 In this study, we synthesized α-Cu 2 Se NWs by the photoreduction method and evaluated the thermoelectric by the photoreduction method, 40−43 where the slow reaction can control the morphology of copper nanoparticles. 42 We applied the above method to the synthesis of α-Cu 2 Se NWs.…”