Self-Assembled 3D Hierarchical Copper Hydroxyphosphate Modified by the Oxidation of Copper Foil as a Recyclable, Wide Wavelength Photocatalyst

Abstract

In this work, three-dimensional flower-like and petal-like copper hydroxyphosphate Cu(OH)(PO) (CHP) based on the self-assembly of numerous nanosheets has been successfully fabricated on a copper foil by a mild one-pot wet-chemical method without ligand assistance. This research contributes to the development of the method to change the morphology of the CHP active material by varying the degree of substrate oxidation. The two different CHP architectures were used to photocatalytically degrade rhodamine 6G (Rh 6G) under solar light, which can absorb wide-range light wavelength from the UV to the near-infrared region. They all exhibit high photocatalytic activity and good durability, which are potential candidates for high performance and recyclable wide wavelength photocatalysis.

Direct reduction of diluted CO2 gas to C2 products by copper hydroxyphosphate microrods

“…From the XPS spectrum of Cu 2p in Figure 1D, it can be seen that there are two peaks at 934.98 and 954.88 eV which are corresponding to Cu 2p3/2 and Cu 2p1/2. While the two satellite peaks at 942.0 and 962.5 eV indicate that copper is present as Cu 2+ in this material 31 . In the XPS spectrum of P 2p (Figure 1E), the peaks at 132.6 and 133.7 eV correspond to P 5+ in PO 4 3− , 32 which verifies the presence of PO 4 3− .…”

Sustainable catalysts for efficient triazole synthesis: an immobilized triazine-based copper-NNN pincer complex on TiO2

“…2 exhibits two major peaks at 932.7 and 952.5 eV, which are related to the binding energies of Cu 2p 3/2 and Cu 2p 1/2 , respectively, and suggests copper to be in the oxidation state +2 or +1. 26,33,37,38 Two smaller peaks at 928.9 and 948.9 eV can be attributed to Cu 2p 3/2 and Cu 2p 1/2 of even further reduced metallic copper (Fig. 2).…”

“…2). 26,37 However, it is difficult to differentiate between oxidation states when only the Cu 2p transition is studied. Therefore, we also measured the Cu LMM Auger transition.…”

Facile One-Pot In Situ Synthesis and Characterization of a Cu2O/Cu2(PO4)(OH) Binary Heterojunction Nanocomposite for the Efficient Photocatalytic Degradation of Ciprofloxacin from Aqueous Solution under Direct Sunlight Irradiation

“…Recently, various approaches have been employed to improve the chemical and physical properties of nanomaterials. − In order to overcome the above-expressed drawbacks of Cu 2 (PO 4 )­(OH) and Cu 2 O structures, formation of a p–n heterojunction nanocomposite can be a potential solution to increase the photocatalytic efficiency. Prior to this, various heterojunction composites of Cu 2 (PO 4 )­(OH) and Cu 2 O materials have been fabricated, such as Cu 2 (OH)­PO 4 /g-C 3 N 4 , TiO 2 –Cu 2 (OH)­PO 4 , Cu 2 (OH)­PO 4 /reduced graphene oxide, Cu 2 (OH)­PO 4 /Cu, Cu 2 O/CdS/ZnO, Cu 2 O/ZnO/Ag 3 PO 4 , and Cu 2 O/Bi/Bi 2 MoO 6 . ,,,,− The combination of Cu 2 (PO 4 )­(OH) and Cu 2 O, due to the generation of the p–n junction heterostructure, can induce a synergistic effect between them and subsequently produce more strong oxidizing agents for outstanding photocatalytic performance under sunlight irradiation.…”