Role of the structure-directing agent on the mesopore formation and morphology evolution of silica nanoparticles

He, Wentao; Yang, Yanlin; Li, Juan; Long, Lijuan; Zhang, Kai; Xiang, Yushu; Qin, Shuhao; Yu, Jie

doi:10.1016/j.colsurfa.2016.09.055

Cited by 8 publications

(5 citation statements)

References 33 publications

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“…The employment of MS is strictly related to its physical-chemical properties, documented by numerous literature examples demonstrating the versatility of MCM-41 synthesis to produce particles with specific structures, morphologies, sizes, or surface properties. , A complete resume of the synthetic approaches is beyond the scope of this manuscript, and many of them are discussed elsewhere. ,, It is worth mentioning that, in the last 30 years, several studies have focused on the control of the particle characteristics, leading to specific syntheses finalized to a specific purpose . The modulation of reaction temperature, pH, or time and generally the type or the amount of surfactant or silica precursor were studied to observe the effects mainly on the pore size , and sometimes on the particle size and morphology . The Taguchi method (a statistical approach based on experimental data to control the particle size by changing synthetic conditions) has been adopted to evaluate the effectiveness of some parameters, like the pH value of silica/surfactant solution, reaction time, and silica precursor (tetraethyl-orthosilicate, TEOS) amount .…”

Section: Introductionmentioning

confidence: 99%

“…16 The modulation of reaction temperature, 17 pH, 18 or time 19 and generally the type or the amount of surfactant 20 or silica precursor 21 were studied to observe the effects mainly on the pore size 22,21 and sometimes on the particle size 23 and morphology. 24 The Taguchi method (a statistical approach based on experimental data to control the particle size by changing synthetic conditions) has been adopted to evaluate the effectiveness of some parameters, like the pH value of silica/surfactant solution, reaction time, and silica precursor (tetraethyl-orthosilicate, TEOS) amount. 25 The relevance of this investigation resided in the use of a strategic method to rule the particle properties for catalytic and biomedical applications.…”

Section: ■ Introductionmentioning

confidence: 99%

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Design Rules for Mesoporous Silica toward the Nanosize: A Systematic Study

Catalano

Pompa

2019

ACS Appl. Mater. Interfaces

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Mesoporous silica nanoparticles (MSNs) are one of the most frequently employed inorganic materials for catalysis and nanomedicine applications. Nonetheless, a complete control of MSN synthesis parameters aimed at standardizing particle properties is still far from complete, being one of the reasons underlying heterogeneity in their chemical−physical properties, as well as in their biological outcomes. Here, transmission electron microscopy, Xray diffraction, and volumetric analysis, together with dynamic light scattering and ζ-potential measurements, were combined to carefully characterize different MSNs through a systematic investigation of the role and effectiveness of different factors, such as reaction temperature, time, and pH, on the resulting particle size, texture, and dispersion properties. This methodological approach allowed the implementation of design rules for size-, shape-, and structurecontrolled MSNs in the range between 170 and 50 nm.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Design Rules for Mesoporous Silica toward the Nanosize: A Systematic Study

Catalano

Pompa

2019

ACS Appl. Mater. Interfaces

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“…The synthesis of MIP‐MS uses materials such as a surfactant, silica precursor, organosilane, and template molecule. The surfactant has a role as directing agents to form the mesoporous structure 22 . Cetyltrimethylammonium bromide (CTAB) (cation surfactant) 23 and Pluronic 123 (non‐ion surfactant) 24 are often used in this synthesis.…”

Section: Molecularly Imprinted Mesoporous Silicamentioning

confidence: 99%

“…The surfactant has a role as directing agents to form the mesoporous structure. 22 Cetyltrimethylammonium bromide (CTAB) (cation surfactant) 23 and Pluronic 123 (non-ion surfactant) 24 are often used in this synthesis.…”

Section: Molecularly Imprinted Mesoporous Silicamentioning

confidence: 99%

Factors affecting the analytical performance of molecularly imprinted mesoporous silica

Mutakin

Hasanah

2021

Polymers for Advanced Techs

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Sample preparation was carried out for the removal of interfering substances in the complex matrix sample. Molecularly imprinted mesoporous silica (MIP-MS) is the specific adsorbent used in the sample preparation for solid-phase extraction. MIP-MS can increase the binding capacity, selectivity, and site accessibility of the molecular target. MIP-MS was synthesized using several materials, such as a silica precursor, surfactant, organosilane, functional monomer, and template molecule. Each material influences the formation and analytical performance of the MIP-MS. This review discusses the factors affecting the analytical performance in MIP-MS synthesis, such as the template molecular concentration, the ratio of the silica precursor and organosilane concentration, the type of functional monomer, and the functional monomer concentration. In addition, factors affecting the analytical performance in the adsorption-desorption study, such as pH, mass sorbent, eluting solvent, and washing solvent, to reach high-analyte recovery are also described.

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“…For example, a nanorod (1D) would behave distinctly different from a nanosphere (3D) or a nanoflake (2D). Out of the several methods, the application of structure directing agents (SDAs) in preparing well-shaped nanomaterials is quite promising, as the SDA-mediated materials exhibit unique properties, especially in pore size, surface geometry, and crystalline frameworks. , The SDAs are typically molecular network structures that guide the formation of nanomaterials to the desired size and shape suitable for a specific application. Thus, they are also called templates.…”

Section: Introductionmentioning

confidence: 99%

Mixed Surfactant-Mediated Synthesis of Hierarchical PANI Nanorods for an Enzymatic Glucose Biosensor

Palsaniya

Nemade

Dasmahapatra

2019

ACS Appl. Polym. Mater.

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The hierarchical nanoscale structure plays a crucial role in achieving excellent property, which can successfully be used in preparing tailor-made materials for sensing applications. These hierarchical nanostructures can successfully be prepared with the help of structure directing agents (SDAs). In the present work, we report the preparation of polyaniline (PANI) nanorods in the presence of anionic (sodium dodecyl sulfate, SDS) and nonionic surfactant (pluronic F127) as the SDAs. We prepare a series of ternary composites with a varying ratio of PANI and F127 for a given amount of SDS. The SDS and F127 play a pivotal role as structure directing agents (SDAs) in delivering a hierarchical nanostructure of PANI. Detailed characterization reveals that the in situ polymerization of PANI ensures the formation of the well-dispersed composite. The amphiphilic character of F127 facilitates the formation of a core–shell micellar structure, which in turn facilitates the polymerization of PANI in the core region. We have observed a composition-dependent structure formation of the ternary composites. With increasing the amount of F127, the composite shows higher crystallinity (viz. less porosity) as measured by XRD and microscopy imaging. Among all the prepared composites, the one with an 1:1 ratio of PANI and F127 exhibits less porosity (viz., high crystallinity) as measured by the BET surface area measurement. The XRD analysis does not show a sharp peak, which signifies that the material possesses a polycrystalline structure, as revealed by HRTEM analysis. The polycrystalline nature of the nanorods provides the highest thermal stability, contributes significantly toward the enhanced electrochemical activity, and thus, can successfully be used in sensing applications. The 1:1 material exhibits remarkably high glucose sensitivity (∼486 μA/cm2 mM) over the other ternary composites under amperometric measurements. The sensor shows an excellent electrochemical performance within a range of 5–50 mM with a lower detection limit of ∼4 μM.

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Role of the structure-directing agent on the mesopore formation and morphology evolution of silica nanoparticles

Cited by 8 publications

References 33 publications

Design Rules for Mesoporous Silica toward the Nanosize: A Systematic Study

Design Rules for Mesoporous Silica toward the Nanosize: A Systematic Study

Factors affecting the analytical performance of molecularly imprinted mesoporous silica

Mixed Surfactant-Mediated Synthesis of Hierarchical PANI Nanorods for an Enzymatic Glucose Biosensor

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