Synthesis and formation mechanism of amorphous silica particles via sol–gel process with tetraethylorthosilicate

Jiang, Xianfa; Tang, Xiaoning; Tang, Lihong; Zhang, Bin; Mao, Huaming

doi:10.1016/j.ceramint.2019.01.067

Cited by 50 publications

(29 citation statements)

References 41 publications

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“…The physicochemical characterization of the synthesized MSNs was performed to ascertain the goodness of the material used as a carrier in this study. MSNs showed a broad band centered at 22 • in the XRD pattern ( Figure 1A), which is ascribable to a silica amorphous material (Dubey et al, 2015;Jiang et al, 2019). The ATR spectrum (Figure 1B) of the sample did exhibit the trademark signs of silica (Mourhly et al, 2015).…”

Section: Msns Characterizationmentioning

confidence: 97%

Formulation of Mesoporous Silica Nanoparticles for Controlled Release of Antimicrobials for Stone Preventive Conservation

et al. 2020

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The biotic deterioration of artifacts of archaeological and artistic interest mostly relies on the action of microorganisms capable of thriving under the most disparate environmental conditions. Thus, to attenuate biodeterioration phenomena, biocides can be used by the restorers to prevent or slow down the microbial growth. However, several factors such as biocide half-life, its wash-out because of environmental conditions, and its limited time of action make necessary its application repeatedly, leading to negative economic implications. Sound and successful treatments are represented by controlled release systems (CRSs) based on porous materials. Here, we report on the design and development of a CRS system based on mesoporous silica nanoparticles (MSNs), as a carrier, and loaded with a biocide. MSNs, with a diameter of 55 nm and cylindrical pores of ca. 3-8 nm arranged as parallel arrays concerning the NP diameter, and with 422 m 2 /g of specific surface area were synthesized by the sol-gel method assisted by oil in water emulsion. Biocide loading and release were carried out in water and monitored by UV-Vis Spectroscopy; in addition, microbiological assay was performed using as control the MCM-41 mesoporous silica loaded with the same biocide. The role of specific supramolecular interaction in regulating the release is discussed. Further, we demonstrated that this innovative formulation was useful in inhibiting the in vitro growth of Kocuria rhizophila, an environmental Gram-positive bacterial strain. Besides, the CRS here prepared reduced the bacterial biomass contaminating a real case study (i.e., stone derived from the Santa Margherita cave located in Sicily, Italy), after several months of treatment thus opening for innovative treatments of deteriorated stone artifacts.

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Section: Msns Characterizationmentioning

confidence: 97%

Formulation of Mesoporous Silica Nanoparticles for Controlled Release of Antimicrobials for Stone Preventive Conservation

et al. 2020

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“…FT-IR characterization was performed on Sol-Si particles and samples of C/Sol-Si and C (Figure 3). To this end, the characteristic functional groups 21,22 of the tested samples were determined based on the IR absorption range. The Sol-Si particles showed characteristic IR bands in the region of 800 cm À1 (Si O Si symmetric stretching) and 450 cm À1…”

Section: Ft-ir Characterizationmentioning

confidence: 99%

A collagen‐silica‐based biocomposite for potential application in bone tissue engineering

Echazú

Renou

Álvarez

et al. 2021

J Biomedical Materials Res

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Bone is a hierarchical material that has inspired the design of biopolymer‐derived biocomposites for tissue engineering purposes. The present study sought to synthesize and perform the physicochemical characterization and biocompatibility of a collagen‐silica‐based biocomposite for potential application in bone tissue engineering. Ultrastructure, biodegradability, swelling behavior, and biocompatibility properties were analyzed to gain insight into the advantages and limitations to the use of this biomaterial as a bone substitute. Scanning electron microscopy analysis showed a packed‐collagen fibril matrix and silica particles in the biocomposite three‐dimensional structure. As shown by analysis of in vitro swelling behavior and biodegradability, it would seem that the material swelled soon after implantation and then suffered degradation. Biocompatibility properties were analyzed in vivo 14‐days postimplantation using an experimental model in Wistar rats. The biocomposite was placed inside the hematopoietic bone marrow compartment of both tibiae (n = 16). Newly formed woven bone was observed in response to both materials. Unlike the pure‐collagen‐tissue interface, extensive areas of osseointegration were observed at the biocomposite‐tissue interface, which would indicate that silica particles stimulated new bone formation. Agglomerates of finely particulate material with no inflammatory infiltrate or multinucleated giant cells were observed in the bone marrow implanted with the biocomposite. The biocomposite showed good biocompatibility properties. Further studies are necessary to evaluate their biological behavior over time.

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“…In addition, the characteristic peak at 842 cm À 1 is attributed to the symmetric stretching vibration of SiÀ OÀ Si. [37] All FTIR spectra have strong SiÀ OÀ Si characteristic peaks, which indicates that lots of condensation reactions among SiÀ OH occurred and a large number of SiÀ OÀ Si bonds came into being during the synthesis of SiO 2 . The characteristic peaks at 795 cm À 1 and 950 cm À 1 are attributed to the stretching vibration and the bending vibration of SiÀ OH, respectively.…”

Section: Ftir Analysis Of Modified Siomentioning

confidence: 99%

“…The characteristic peaks at 795 cm À 1 and 950 cm À 1 are attributed to the stretching vibration and the bending vibration of SiÀ OH, respectively. [37][38][39] The characteristic peaks at 2961 cm À 1 and 2900 cm À 1 correspond to the stretching vibration absorption of À CH 3 , [40][41][42] the characteristic peak at 1255 cm À 1 corresponds to the symmetrical stretching vibration of SiÀ CH 3 , and the characteristic peak at 755 cm À 1 corresponds to the stretching vibration of -SiÀ (CH 3 ) 3 . [38,40,43] With the increase of TMES addition amount, the characteristic peak intensity of SiÀ OH decreased, while that for those characteristic peaks of SiÀ OÀ Si, À CH 3 , SiÀ CH 3 and À SiÀ (CH 3 ) 3 increased.…”

Section: Ftir Analysis Of Modified Siomentioning

confidence: 99%

Preparation of Fluorine‐Free and Superhydrophobic SiO₂ Film with High Transmittance

2020

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Superhydrophobic film has broad application prospect in daily life. Herein, superhydrophobic SiO2 film was prepared with chemical modification reducing the film's surface energy and sol mixing increasing its surface roughness. Tetraethoxysilane (TEOS) was used as precursor, trimethylethoxysilane (TMES) was used as modifier. Both the modified SiO2 film and the mixed SiO2 film were obtained with dip‐coating. With the increase of TMES addition, the characteristic peak intensity of hydrophilic hydroxyl group in Fourier transform infrared spectrum (FTIR) decreased, and that of the hydrophobic methyl group increased; the modified SiO2 film surface was relatively smooth and its root‐mean‐square (RMS) roughness ranged 1.86‐5.41 nm, while that of the mixed SiO2 film increased from 11.20 nm to 42.60 nm; the contact angle of the modified SiO2 film increased from 19.08° to 127.37°, while that of the mixed SiO2 film increased from 129.47° to 158.47°; the average transmittance of the modified SiO2 film first decreased from 94.86 % to 94.14 % and then increased to 94.43 %, while that of the mixed SiO2 film decreased gradually from 96.99 % to 94.84 %. Finally, the fluorine‐free superhydrophobic SiO2 film with the average contact angle of 158.47° and the average transmittance of 94.84 % was obtained.

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Synthesis and formation mechanism of amorphous silica particles via sol–gel process with tetraethylorthosilicate

Cited by 50 publications

References 41 publications

Formulation of Mesoporous Silica Nanoparticles for Controlled Release of Antimicrobials for Stone Preventive Conservation

Formulation of Mesoporous Silica Nanoparticles for Controlled Release of Antimicrobials for Stone Preventive Conservation

A collagen‐silica‐based biocomposite for potential application in bone tissue engineering

Preparation of Fluorine‐Free and Superhydrophobic SiO₂ Film with High Transmittance

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Synthesis and formation mechanism of amorphous silica particles via sol–gel process with tetraethylorthosilicate

Cited by 50 publications

References 41 publications

Formulation of Mesoporous Silica Nanoparticles for Controlled Release of Antimicrobials for Stone Preventive Conservation

Formulation of Mesoporous Silica Nanoparticles for Controlled Release of Antimicrobials for Stone Preventive Conservation

A collagen‐silica‐based biocomposite for potential application in bone tissue engineering

Preparation of Fluorine‐Free and Superhydrophobic SiO2 Film with High Transmittance

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Preparation of Fluorine‐Free and Superhydrophobic SiO₂ Film with High Transmittance