Abstract
A new strategy for depositing highly dispersed Cu and Ni nanoparticles on the surface of TiO2 from a single source is demonstrated for photocatalytic hydrogen production. We used a newly synthesized cyanide-bridged hetero-bimetallic coordination polymer [{CuII(4,4′-dipy)2}{Ni(CN)4}]n·0.7(C2H6O2).1.6(H2O) (CP-1) (4,4′-dipy = 1,3-di(4-pyridyl)propane) as a single-source precursor of Cu-Ni nanoparticles. The structure of CP-1 was established by single-crystal X-ray diffraction analysis; CP-1 crystallizes in the monoclinic space group C2/c with β = 111.67(3)°. CP-1/TiO2 composites containing different weight percentages of CP-1 were achieved by hydrolyzing titanium isopropoxide in the presence of CP-1. Highly dispersed Cu and Ni nanoparticles were deposited on TiO2 by the calcination of the CP-1/TiO2 composites at different temperatures (420 °C, 470 °C and 520 °C) in air followed by reduction in H2/Ar atmosphere at 470 °C for 2 h. XRD, DRS/UV-Vis, TEM, Cu/Ni 2p XPS, and photoluminescence spectroscopy demonstrated the presence of CuO/Cu0 and NiO/Ni0 as active co-catalysts on the surface of TiO2. The 1 wt% Cu-Ni/TiO2-470 photocatalyst showed the maximum H2 production activity of 8.5 mmol h-1 g-1 in a glycerol/water mixture (20 vol%). The results are anticipated to direct the future development of efficient, low-cost and noble metal-free semiconductor photocatalysts for solar H2 production.
| Original language | English |
|---|---|
| Pages (from-to) | 1816-1827 |
| Number of pages | 12 |
| Journal | Inorganic Chemistry Frontiers |
| Volume | 5 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 1 Aug 2018 |
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Novel hetero-bimetallic coordination polymer as a single source of highly dispersed Cu/Ni nanoparticles for efficient photocatalytic water splitting. / Ibrahim, Shaista; Majeed, Imran; Qian, Yuhong; Iqbal, Azhar; Zhao, Dan; Turner, David R.; Nadeem, Muhammad Arif.
In: Inorganic Chemistry Frontiers, Vol. 5, No. 8, 01.08.2018, p. 1816-1827.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Novel hetero-bimetallic coordination polymer as a single source of highly dispersed Cu/Ni nanoparticles for efficient photocatalytic water splitting
AU - Ibrahim, Shaista
AU - Majeed, Imran
AU - Qian, Yuhong
AU - Iqbal, Azhar
AU - Zhao, Dan
AU - Turner, David R.
AU - Nadeem, Muhammad Arif
PY - 2018/8/1
Y1 - 2018/8/1
N2 - A new strategy for depositing highly dispersed Cu and Ni nanoparticles on the surface of TiO2 from a single source is demonstrated for photocatalytic hydrogen production. We used a newly synthesized cyanide-bridged hetero-bimetallic coordination polymer [{CuII(4,4′-dipy)2}{Ni(CN)4}]n·0.7(C2H6O2).1.6(H2O) (CP-1) (4,4′-dipy = 1,3-di(4-pyridyl)propane) as a single-source precursor of Cu-Ni nanoparticles. The structure of CP-1 was established by single-crystal X-ray diffraction analysis; CP-1 crystallizes in the monoclinic space group C2/c with β = 111.67(3)°. CP-1/TiO2 composites containing different weight percentages of CP-1 were achieved by hydrolyzing titanium isopropoxide in the presence of CP-1. Highly dispersed Cu and Ni nanoparticles were deposited on TiO2 by the calcination of the CP-1/TiO2 composites at different temperatures (420 °C, 470 °C and 520 °C) in air followed by reduction in H2/Ar atmosphere at 470 °C for 2 h. XRD, DRS/UV-Vis, TEM, Cu/Ni 2p XPS, and photoluminescence spectroscopy demonstrated the presence of CuO/Cu0 and NiO/Ni0 as active co-catalysts on the surface of TiO2. The 1 wt% Cu-Ni/TiO2-470 photocatalyst showed the maximum H2 production activity of 8.5 mmol h-1 g-1 in a glycerol/water mixture (20 vol%). The results are anticipated to direct the future development of efficient, low-cost and noble metal-free semiconductor photocatalysts for solar H2 production.
AB - A new strategy for depositing highly dispersed Cu and Ni nanoparticles on the surface of TiO2 from a single source is demonstrated for photocatalytic hydrogen production. We used a newly synthesized cyanide-bridged hetero-bimetallic coordination polymer [{CuII(4,4′-dipy)2}{Ni(CN)4}]n·0.7(C2H6O2).1.6(H2O) (CP-1) (4,4′-dipy = 1,3-di(4-pyridyl)propane) as a single-source precursor of Cu-Ni nanoparticles. The structure of CP-1 was established by single-crystal X-ray diffraction analysis; CP-1 crystallizes in the monoclinic space group C2/c with β = 111.67(3)°. CP-1/TiO2 composites containing different weight percentages of CP-1 were achieved by hydrolyzing titanium isopropoxide in the presence of CP-1. Highly dispersed Cu and Ni nanoparticles were deposited on TiO2 by the calcination of the CP-1/TiO2 composites at different temperatures (420 °C, 470 °C and 520 °C) in air followed by reduction in H2/Ar atmosphere at 470 °C for 2 h. XRD, DRS/UV-Vis, TEM, Cu/Ni 2p XPS, and photoluminescence spectroscopy demonstrated the presence of CuO/Cu0 and NiO/Ni0 as active co-catalysts on the surface of TiO2. The 1 wt% Cu-Ni/TiO2-470 photocatalyst showed the maximum H2 production activity of 8.5 mmol h-1 g-1 in a glycerol/water mixture (20 vol%). The results are anticipated to direct the future development of efficient, low-cost and noble metal-free semiconductor photocatalysts for solar H2 production.
UR - http://www.scopus.com/inward/record.url?scp=85051235561&partnerID=8YFLogxK
U2 - 10.1039/c8qi00355f
DO - 10.1039/c8qi00355f
M3 - Article
VL - 5
SP - 1816
EP - 1827
JO - Inorganic Chemistry Frontiers: an international journal of inorganic chemistry
JF - Inorganic Chemistry Frontiers: an international journal of inorganic chemistry
SN - 2052-1545
IS - 8
ER -