TY - JOUR
T1 - Formation and controlled growth of bismuth titanate phases into mesoporous silica nanoparticles
T2 - An efficient self-sealing nanosystem for UV filtering in cosmetic formulation
AU - Zaccariello, Gloria
AU - Back, Michele
AU - Zanello, Marta
AU - Canton, Patrizia
AU - Cattaruzza, Elti
AU - Riello, Pietro
AU - Alimonti, Alessandro
AU - Benedetti, Alvise
PY - 2017/1/1
Y1 - 2017/1/1
N2 - The application of nanosized inorganic UV filters in cosmetic field is limited by their high photocatalytic properties that could induce the degradation or dangerous transformation of the organic molecules in sunscreen formulations. To overcome this problem and simultaneously enlarge the window of filter’s absorption, we propose the growth of bismuth titanates BixTiyOz into mesoporous silica nanoparticles (MSN). We investigated the chemical-physical properties by means of XRPD, TEM, UV−vis spectroscopy, N2 physisorption, XPS, and SF-ICP-MS analysis, while the influence on the environment was evaluated through photocatalytic tests. The growing process of this new nanosystem is discussed underlining the key role of the Bi3+ ion that, acting as a low-melting point agent for the silica framework, led to a self-sealing mechanism. The excellent UV shielding properties combined with a radical suppression of the photocatalytic activity make the proposed nanosystem a perfect candidate for the development of the next generation nanomaterials for sunscreen formulations.
AB - The application of nanosized inorganic UV filters in cosmetic field is limited by their high photocatalytic properties that could induce the degradation or dangerous transformation of the organic molecules in sunscreen formulations. To overcome this problem and simultaneously enlarge the window of filter’s absorption, we propose the growth of bismuth titanates BixTiyOz into mesoporous silica nanoparticles (MSN). We investigated the chemical-physical properties by means of XRPD, TEM, UV−vis spectroscopy, N2 physisorption, XPS, and SF-ICP-MS analysis, while the influence on the environment was evaluated through photocatalytic tests. The growing process of this new nanosystem is discussed underlining the key role of the Bi3+ ion that, acting as a low-melting point agent for the silica framework, led to a self-sealing mechanism. The excellent UV shielding properties combined with a radical suppression of the photocatalytic activity make the proposed nanosystem a perfect candidate for the development of the next generation nanomaterials for sunscreen formulations.
KW - Bismuth titanate
KW - Inorganic sunscreen
KW - Mesoporous silica nanoparticles
KW - Photocatalysis
KW - TiO2
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U2 - 10.1021/acsami.6b13252
DO - 10.1021/acsami.6b13252
M3 - Article
AN - SCOPUS:85031701200
VL - 9
SP - 1913
EP - 1921
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 2
ER -