Details
| Original language | English |
|---|---|
| Pages (from-to) | 223-233 |
| Number of pages | 11 |
| Journal | Journal of Colloid and Interface Science |
| Volume | 580 |
| Early online date | 11 Jul 2020 |
| Publication status | Published - 15 Nov 2020 |
Abstract
Herein, triblock copolymer surfactant (F127) and mesoporous silica (MCM-41) as soft and hard templates were employed to synthesize of mesoporous CuO/g-C 3N 4 heterostructures with large surface areas for Hg(II) photoreduction in existence of formic acid as a holes sacrificial. TEM image for mesoporous CuO/g-C 3N 4 indicated that CuO NPs are homogeneously distributed with spherical shape in particle size ~5 nm onto the surface of g-C 3N 4. Mesoporous 2%CuO/g-C 3N 4 heterostructure was achieved a high Hg(II) photoreduction rate of 628.74 µmolg −1h −1 and high photoreduction efficiency of ~100% within 50 min compared with the pure either mesoporous CuO NPs (130.11 µmolg −1h −1, 21%) and g-C 3N 4 (88.54 µmolg −1h −1, 14%). The highest Hg(II) photoreduction rate achieved was 628.74 µmolg −1h −1, which is 4.83 and 7.1 magnitudes stronger than mesoporous CuO NPs and g-C 3N 4. The excellent photocatalytic performance of mesoporous CuO/g-C 3N 4 heterostructures for Hg(II) photoreduction is referred to highly dispersed mesoporous CuO NPs with small particle size onto g-C 3N 4, narrow bandgap, large surface area, a rapid transfer of Hg(II) ions and HCOOH to easily reach the active sites due to the facile penetration through the mesostructure, thus promoting the utilization of porous structure of CuO/g-C 3N 4 heterostructures for efficient diffusion of Hg(II) ions. The intense interaction between mesoporous CuO NPs and porous g-C 3N 4 confirms the durability of the CuO/g-C 3N 4 heterostructures during recyclability for five times.
Keywords
- CuO/g-C N, Heterojunctions, Mesoporous, Photoreduction of Hg(II), Visible light
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Materials Science(all)
- Biomaterials
- Materials Science(all)
- Surfaces, Coatings and Films
- Chemical Engineering(all)
- Colloid and Surface Chemistry
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal of Colloid and Interface Science, Vol. 580, 15.11.2020, p. 223-233.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Soft and hard templates assisted synthesis mesoporous CuO/g-C3N4 heterostructures for highly enhanced and accelerated Hg(II) photoreduction under visible light
AU - Kadi, Mohammad W.
AU - Mohamed, Reda M.
AU - Ismail, Adel A.
AU - Bahnemann, D.W.
N1 - Funding Information: This project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, under grant no. RG-35-130-38. The authors, therefore, acknowledge with thanks DSR for technical and financial support.
PY - 2020/11/15
Y1 - 2020/11/15
N2 - Herein, triblock copolymer surfactant (F127) and mesoporous silica (MCM-41) as soft and hard templates were employed to synthesize of mesoporous CuO/g-C 3N 4 heterostructures with large surface areas for Hg(II) photoreduction in existence of formic acid as a holes sacrificial. TEM image for mesoporous CuO/g-C 3N 4 indicated that CuO NPs are homogeneously distributed with spherical shape in particle size ~5 nm onto the surface of g-C 3N 4. Mesoporous 2%CuO/g-C 3N 4 heterostructure was achieved a high Hg(II) photoreduction rate of 628.74 µmolg −1h −1 and high photoreduction efficiency of ~100% within 50 min compared with the pure either mesoporous CuO NPs (130.11 µmolg −1h −1, 21%) and g-C 3N 4 (88.54 µmolg −1h −1, 14%). The highest Hg(II) photoreduction rate achieved was 628.74 µmolg −1h −1, which is 4.83 and 7.1 magnitudes stronger than mesoporous CuO NPs and g-C 3N 4. The excellent photocatalytic performance of mesoporous CuO/g-C 3N 4 heterostructures for Hg(II) photoreduction is referred to highly dispersed mesoporous CuO NPs with small particle size onto g-C 3N 4, narrow bandgap, large surface area, a rapid transfer of Hg(II) ions and HCOOH to easily reach the active sites due to the facile penetration through the mesostructure, thus promoting the utilization of porous structure of CuO/g-C 3N 4 heterostructures for efficient diffusion of Hg(II) ions. The intense interaction between mesoporous CuO NPs and porous g-C 3N 4 confirms the durability of the CuO/g-C 3N 4 heterostructures during recyclability for five times.
AB - Herein, triblock copolymer surfactant (F127) and mesoporous silica (MCM-41) as soft and hard templates were employed to synthesize of mesoporous CuO/g-C 3N 4 heterostructures with large surface areas for Hg(II) photoreduction in existence of formic acid as a holes sacrificial. TEM image for mesoporous CuO/g-C 3N 4 indicated that CuO NPs are homogeneously distributed with spherical shape in particle size ~5 nm onto the surface of g-C 3N 4. Mesoporous 2%CuO/g-C 3N 4 heterostructure was achieved a high Hg(II) photoreduction rate of 628.74 µmolg −1h −1 and high photoreduction efficiency of ~100% within 50 min compared with the pure either mesoporous CuO NPs (130.11 µmolg −1h −1, 21%) and g-C 3N 4 (88.54 µmolg −1h −1, 14%). The highest Hg(II) photoreduction rate achieved was 628.74 µmolg −1h −1, which is 4.83 and 7.1 magnitudes stronger than mesoporous CuO NPs and g-C 3N 4. The excellent photocatalytic performance of mesoporous CuO/g-C 3N 4 heterostructures for Hg(II) photoreduction is referred to highly dispersed mesoporous CuO NPs with small particle size onto g-C 3N 4, narrow bandgap, large surface area, a rapid transfer of Hg(II) ions and HCOOH to easily reach the active sites due to the facile penetration through the mesostructure, thus promoting the utilization of porous structure of CuO/g-C 3N 4 heterostructures for efficient diffusion of Hg(II) ions. The intense interaction between mesoporous CuO NPs and porous g-C 3N 4 confirms the durability of the CuO/g-C 3N 4 heterostructures during recyclability for five times.
KW - CuO/g-C N
KW - Heterojunctions
KW - Mesoporous
KW - Photoreduction of Hg(II)
KW - Visible light
UR - http://www.scopus.com/inward/record.url?scp=85087954798&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2020.07.001
DO - 10.1016/j.jcis.2020.07.001
M3 - Article
VL - 580
SP - 223
EP - 233
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
SN - 0021-9797
ER -