I have tried to synthesize Fe3O4 using sol gel method using 2:1 molar ratio from Fe+2:Fe+3, but the result is Fee2O3, how can obtain the desired oxide Fe3O4 ?
There's a wide variety of described techniques and they're well-known.
Please, check the Elmore approach. It's typical.
Here you can find corresponding references of the usage of various precursors & procedures.
Elmore W. C. // Phys. Rev. — 1938.— 54. — P. 309-310.
Luntraru V. I., Gales O., Iarca L. et al. // Oproelectron. Adv. Mat. — 2011.— 5. — P. 1229-1232.
Couling S. B., Mann S. // J. Chem. Soc. Chem. Commun. — 1985— P. 1713-1715.
N. Mahmed, O. Heczko, O. Soederberg et al. // Proc. of the IOP Conference Series: Materials Science and Engineering, 2011. — P. 032020.
Cheng J. P., Ma R., Shi D. et al. // Ultrason. Sonochem. — 2011.— 18. — P. 1038-1042.
Take Iron (III) nitrite with proper molar concentration and add 0.5 M NaOH solution followed by ammonia solution then it form precipitate that precipitate is pre-heated on hot plate for 2-4 hours dehydration take place finally you end up with Fe3O4 / Fe2O3
Thank you T. N. Ravishankar, but the problem is that Fe2O3 is not required, I'd like to obtain only Fe3O4
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