Prepare porous silica nanospheres for water sustainability: high efficient and recyclable adsorbent for cationic organic dyes

Lv, Xinyan; Zhao, Mengen; Chen, Zhenhua; Zhang, Jie; Tian, Xiaohan; Ren, Xiuli; Mei, Xifan

doi:10.1007/s00396-017-4224-4

Cited by 11 publications

(8 citation statements)

References 39 publications

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“…Our previous work has proven that colloidal silica nanospheres are efficient and recyclable in removing dyes. 32 However, the drawbacks of using colloidal nanospheres for removing dyes in water are obvious because of the difficult recovery of nanomaterials after dye adsorption. Long-term sedimentation and other recovery methods such as centrifugation are not suitable for dye adsorption of natural water resources.…”

Section: Resultsmentioning

confidence: 99%

“…The preparation of silica porous NSs is according to the previous work. 32 The procedure is as follows: ethanol-water co-solvent system was chosen, briefly, 1.8 mL of ammonia solution, 2.48 mL of ethanol and 1.0 mL of H 2 O were mixed together in a 20 mL erlenmeyer flask. The mixture was stirred (1000 rpm, magnetic stirrer) for 8 minutes.…”

Section: Methodsmentioning

confidence: 99%

“…The adsorption capacity (q e ) and removal efficiency (D) during the filtration were calculated by following equations. 32

Figure 2 Chemical structure of ( A ) AB; ( B ) MB. …”

Section: Methodsmentioning

confidence: 99%

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Preparation of Ag Nanoclusters-Modified Non-Sintered Silica Ceramic-Like Nanosheet for Removing Dyes and Bacteria from Water

Ren

Chen

et al. 2021

IJN

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Purpose Worldwide water contamination treatment and water security are essential for all living organisms. Among various water contaminants, dye, and bacteria pollution needs to be solved urgently. Methods and Results In this work, a ceramic sheet from monodisperse, porous silica nanospheres (SiO 2 NSs) with an average diameter of 220 was prepared. The prepared SiO 2 ceramic sheets were investigated as a “filtration” material in removing dyes (alcian blue, AB; and methylene blue, MB) and bacteria ( E. coli and S. aureus ). The obtained sheets had efficient adsorption efficiency of 98.72% (for AB) and 97.35% (for MB), and a high adsorption capacity for AB is 220 (mg/g), for MB is 176 (mg/g). Furthermore, these SiO 2 ceramic sheets had a high recycling capability for removing dyes by calcination. Being modified by Ag nanoclusters, the ceramic sheets present a strong bactericidal function. Conclusion Our results demonstrated that the obtained SiO 2 non-sintered ceramic sheets is rapid and efficient in the filtration of dyes and bacteria from polluted water.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Preparation of Ag Nanoclusters-Modified Non-Sintered Silica Ceramic-Like Nanosheet for Removing Dyes and Bacteria from Water

Ren

Chen

et al. 2021

IJN

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“…8). Furthermore, repeated recycle tests were performed for CTS–SA–SiO 2 through solvent decoration [11, 17]. After the ternary aerogel beads were washed by ethanol to release the dye.…”

Section: Resultsmentioning

confidence: 99%

Rational fabrication of chitosan/alginate/silica ternary aerogel beads adsorbent with free separation

Wei

Yin

et al. 2019

Micro & Nano Letters

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Novel chitosan/alginate/silica ternary aerogel beads were successfully prepared by the orifice-coagulation bath with the ambient pressure drying method and utilising chitosan, sodium alginate, and tetraethoxysilane as the initial raw materials. The morphologies, porosity characteristics, and dye absorbencies of the ternary aerogel beads were also investigated, respectively. The obtained samples are milky light solid, the size of the spherical aerogel is uniform, its diameter can be controlled ∼5 mm, the specific surface area is 169.4 m 2 g −1 , pore size distribution is concentrated in the 2-100 nm, which is a typical nanofilamentous network structure. Meanwhile, the ternary beads were tested for dyestuffs adsorption; the results showed that the obtained samples exhibit excellent adsorption properties, and can keep good sphericity as a class of novel adsorbents.

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“…Among these processes, adsorption is one of the most attractive technologies due to its high efficiency, simplicity, low cost and simple technology [ 7 ]. Although many adsorbents, such as activated carbon [ 8 ], clay [ 9 ], silica [ 10 ] and other porous materials [ 11 , 12 ], have already been used in the removal of dyes from wastewater, nanofibrous absorbent materials prepared by electrospinning have attracted a great deal of attention in recent years. This is because the electrospinning technique is a facile and low-cost method to prepare nanofibers with high surface area and high porosity, small inter fibrous pore sizes, and high gas permeability [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Environmentally Friendly Gelatin/β-Cyclodextrin Composite Fiber Adsorbents for the Efficient Removal of Dyes from Wastewater

Chen

et al. 2018

Molecules

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In this paper, environmentally friendly gelatin/β-cyclodextrin (β-CD) composite fiber adsorbents prepared by electrospinning were used for the removal of dyes from wastewater. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and a universal materials tester were employed to characterize the internal structures, surface morphologies and mechanical strength of the composite fiber adsorbents. Additionally, the fiber was evaluated as an adsorbent for the removal of methylene blue (MB) from aqueous solution. The effects of the raw material ratio, pH, temperature, concentration and adsorption time were studied. The results show that the gelatin/β-CD composite fiber adsorbents possess excellent mechanical strength and high adsorption efficiency for MB. The adsorption equilibrium and adsorption kinetics are well-described by the Langmuir isotherm model and the pseudo-second-order kinetic model, respectively. The theoretical maximum adsorption capacity is 47.4 mg·g−1. Additionally, after nine successive desorption-adsorption cycles, the removal rate is still over 70%. Moreover, the gelatin/β-CD composite fiber adsorbents exhibit excellent adsorption capability for basic fuchsin, gentian violet, brilliant blue R and malachite green dyes. Therefore, owing to the characteristics of degradability, low cost and high-efficiency, the gelatin/β-CD composite fiber can be used as an efficient adsorbent for the removal of dyes from wastewater.

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Prepare porous silica nanospheres for water sustainability: high efficient and recyclable adsorbent for cationic organic dyes

Cited by 11 publications

References 39 publications

Preparation of Ag Nanoclusters-Modified Non-Sintered Silica Ceramic-Like Nanosheet for Removing Dyes and Bacteria from Water

Preparation of Ag Nanoclusters-Modified Non-Sintered Silica Ceramic-Like Nanosheet for Removing Dyes and Bacteria from Water

Rational fabrication of chitosan/alginate/silica ternary aerogel beads adsorbent with free separation

Environmentally Friendly Gelatin/β-Cyclodextrin Composite Fiber Adsorbents for the Efficient Removal of Dyes from Wastewater

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