Behavior of copper ions in silica xerogels
Source abstract
Abstract
Abstract Various concentrations of copper were introduced into tetraethoxyorthosilicate (Si(OC 2 H 5 ) 4 ) based xerogels by CuSO 4 solutions. After ambient drying and different thermal treatments, samples were characterized by gas adsorption, atomic adsorption spectroscopy (AAS), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The behavior of Cu cations during aging and subsequent heating was deduced. Based on the experimental data, no direct metal–oxygen–silicon bonds were found in Cu concentrations up to 2000 ppm. After heating at 600 °C for 3 h, copper was observed as dispersed Cu ions and Cu polycrystals.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Glass properties and applications · Mesoporous Materials and Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Rolison · J. Mater. Chem. · 2001 · 11 · 96310.1039/b007591o ↗
2. Morris · Science · 1999 · 284 · 62210.1126/science.284.5414.622 ↗
3. Breitscheide · Chem. Mater. · 1991 · 3 · 55910.1021/cm00015a037 ↗
4. Stiegman · Chem. Mater. · 1993 · 5 · 159110.1021/cm00035a001 ↗
5. Harreld · Mater. Res. Bull. · 1998 · 33 · 56110.1016/S0025-5408(98)00022-1 ↗
6. Tseng · Appl. Catal. · 2002 · 37 · 3710.1016/S0926-3373(01)00322-8 ↗
7. Owens · J. Non-Cryst. Solids · 1995 · 186 · 17710.1016/0022-3093(95)00070-4 ↗
8. Koppel · J. Catal. · 1998 · 179 · 51510.1006/jcat.1998.2252 ↗
9. Karakassides · J. Mater. Chem. · 2000 · 10 · 40310.1039/a904545g ↗
10. Mohanan · Chem. Mater. · 2003 · 15 · 256710.1021/cm021741x ↗
11. Buckley · J. Non-Cryst. Solids · 1992 · 146 · 9710.1016/S0022-3093(05)80481-8 ↗
12. Nogami · J. Mater. Res. · 1995 · 264810.1557/JMR.1995.2648 ↗
13. Cordaba · J. Solid State Chem. · 1996 · 123 · 9310.1006/jssc.1996.0156 ↗
14. Parler · J. Non-Cryst. Solids · 2001 · 279 · 11910.1016/S0022-3093(00)00401-4 ↗
15. Zhao · Chem. Lett. · 1996 · 55
16. S. Lowell, J.E. Shields, Powder Surface Area and Porosity, 2nd Ed., p. 10, 59
17. Personal conversations with engineers in Quantachrome Corp
18. Everett · 1958 · 68
19. Brinker · 1990
20. J.D. Wright, N.A.J.M. Sommerdijk, Sol–Gel Materials, Chemistry and Applications, 2001, p. 19
21. Pierre · Mater. Res. Soc. Symp. Proc. · 1988 · 121 · 20710.1557/PROC-121-207 ↗
22. Ruiz · J. Mater. Res. · 2000 · 15 · 287510.1557/JMR.2000.0410 ↗