Facile Synthesis of Potassium Poly(heptazine imide) (PHIK)/Ti-Based Metal-Organic Framework (MIL-125-NH2) Composites for Photocatalytic Applications
被引:79
作者:
Rodriguez, Nicolas A.
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UNMdP, FCEyN, Dept Quim, RA-7600 Mar Del Plata, Argentina
UNMdP CONICET, FCEyN, Inst Fis Mar Plata IFIMAR, RA-7600 Mar Del Plata, ArgentinaUNMdP, FCEyN, Dept Quim, RA-7600 Mar Del Plata, Argentina
Rodriguez, Nicolas A.
[1
,2
]
Savateev, Aleksandr
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Max Planck Inst Colloids & Interfaces, Dept Colloid Chem, D-14476 Potsdam, GermanyUNMdP, FCEyN, Dept Quim, RA-7600 Mar Del Plata, Argentina
Savateev, Aleksandr
[3
]
Grela, Maria A.
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UNMdP, FCEyN, Dept Quim, RA-7600 Mar Del Plata, Argentina
UNMdP CONICET, FCEyN, Inst Fis Mar Plata IFIMAR, RA-7600 Mar Del Plata, ArgentinaUNMdP, FCEyN, Dept Quim, RA-7600 Mar Del Plata, Argentina
Grela, Maria A.
[1
,2
]
Dontsova, Dariya
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Max Planck Inst Colloids & Interfaces, Dept Colloid Chem, D-14476 Potsdam, GermanyUNMdP, FCEyN, Dept Quim, RA-7600 Mar Del Plata, Argentina
Dontsova, Dariya
[3
]
机构:
[1] UNMdP, FCEyN, Dept Quim, RA-7600 Mar Del Plata, Argentina
[2] UNMdP CONICET, FCEyN, Inst Fis Mar Plata IFIMAR, RA-7600 Mar Del Plata, Argentina
Photocatalytically active composites comprising potassium poly(heptazine imide) (PHIK) and a Ti-based metal organic framework (MOF, MIL-125-NH2) are prepared in situ by simply dispersing both materials in water. The driving forces of composite formation are the electrostatic interactions between the solids and the diffusion of potassium ions from PHIK to MIL-125-NH2. This mechanism implies that other composites of poly(heptazine imide) salts and different MOTs bearing positive surface charge can potentially be obtained in a similar fashion. The suggested strategy thus opens a new avenue for the facile synthesis of such materials. The composites are shown to have a superior photocatalytic activity in Rhodamine B degradation under blue light irradiation. The reaction rate is doubled compared to that of pure MOF compound and is 7 times higher than the activity of the pristine PHIK. The results of the electron paramagnetic resonance (EPR) investigations and the analysis of the electronic structures of the solids suggest the electron transfer from MIL-125-NH2, to PHIK in the composite. The possible pathways for the dye degradation and the rationalization of the increased activity of the composites are elaborated.
机构:
Univ Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, MalaysiaUniv Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, Malaysia
Abd Hamid, Sharifah Bee
;
Tan, Tong Ling
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Univ Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, MalaysiaUniv Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, Malaysia
Tan, Tong Ling
;
Lai, Chin Wei
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Univ Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, MalaysiaUniv Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, Malaysia
机构:
Univ Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, MalaysiaUniv Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, Malaysia
Abd Hamid, Sharifah Bee
;
Tan, Tong Ling
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Univ Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, MalaysiaUniv Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, Malaysia
Tan, Tong Ling
;
Lai, Chin Wei
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Univ Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, MalaysiaUniv Malaya, Inst Grad Studies Bldg, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, Malaysia