Synthesis of ordered porous SiO₂ with pores on the border between the micropore and mesopore regions using rosin-based quaternary ammonium salt

Abstract

A novel, sustainable, rosin-based quaternary ammonium salt, dehydroabietyltrimethyl ammonium bromine, has been applied for the synthesis of ordered hexagonal supermicroporous silica with nanosheet morphology. Unlike the conventional short chain surfactants, rosin-based surfactant possesses a rigid group of a three-ring phenanthrene skeleton. Such a hydrophobic group gives the surfactant a large total volume and small effective headgroup area, which are beneficial for the formation of 2D hexagonal phase. XRD, N 2 adsorption-desorption, TEM, and SEM are used to characterize the samples. The results indicate that the molar ratios of mixture of silicate source, template agent and inorganic acid in the synthesis system have great effects on the regularity of the pore structure. The synthesized material possesses large surface area (1229 m 2 g À1 ), high pore volume (0.59 cm 3 g À1 ) and narrow pore size distribution (centered at about 2.03 nm), which is on the borderline between the micropore and mesopore regions. Such a material will be attractive for applications in separations and catalysis because of its potential shape and size selectivities.

Mesoporous Materials Prepared Using Cashew Nut Shell Liquid and Castor Oil as Surfactants

“…The most commonly utilized groups of surfactants are the quaternary ammonium salts [9], the neutral amines [10] and the block copolymers [11]. It is proposed [12] that neutral surfactants direct formation of mesophase through hydrogen bonding interactions and self-assembly between neutral amine micelles and neutral inorganic precursors while charged surfactants involve electrostatic interactions.…”

Morphology-Controllable Hydrothermal Synthesis of Zirconia with the Assistance of a Rosin-Based Surfactant

“…ZrOCl 2 •8H 2 O (AR) were purchased from Sinopharm Chemical Reagent Co., Ltd., Shanghai, China DTAB was self-synthesized according to the methodology of our previous study [19].…”

Synthesis of ordered lamellar supermicroporous silica with rigid neutral and long-chain cationic composite templating route

“…Previously, our group successfully synthesized ordered hexagonal silica with rosin-based quaternary ammonium salt made from dehydroabietylamine (DHAA; the molecularstructure is shown in S1 File)[17]. In this paper, by mixing cetyltrimethyl ammonium bromide (CTAB) and DHAA as the templating agents, ordered lamellar supermicroporous silicas were synthesized.…”