Hollow poly(cyclotriphosphazene-co-phloroglucinol) microspheres: An effective and selective adsorbent for the removal of cationic dyes from aqueous solution

Fu, Jianwei; Chen, Zhonghui; Wu, Xuechen; Wang, Minghuan; Xu, Qun; Zhang, Jinghui; Zhang, Jianan

doi:10.1016/j.cej.2015.06.088

Cited by 86 publications

(12 citation statements)

References 41 publications

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“…Compared with the TiO 2 P25, TiNPs/PSF and PSF microspheres showed much higher adsorption speed benefited from porous structure and the electrostatic attraction between the MB + and the negatively charged PSF materials [ 38 , 39 ]. Therefore, the quasi-first-order model ( Figure 5 b), quasi-second-order model ( Figure 5 c), and intra-particle diffusion model ( Figure 5 d) models were used to analyze their adsorption capacity, which is calculated as following equation [ 40 ]:

where q t (g mg − 1 ) and q e (g mg − 1 ) are the adsorbed amount at time t and at equilibrium, respectively. k 1 (min − 1 ), k 2 (g mg − 1 min − 1 ) and k 3 (mg g − 1 min − 0.5 ) are the rate constants of pseudo-first order, pseudo-second order and intraparticle diffusion model, respectively.…”

Section: Resultsmentioning

confidence: 99%

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

et al. 2021

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Nanosized titanium oxide (TiO2) material is a promising photocatalyst for the degradation of organic pollutants, whereas the difficulty of its recycling hinders its practical application. Herein, we reported the preparation of a novel titanium oxide/polysulfone (TiNPs/PSF) composite hollow microspheres by the combination of Pickering emulsification and the solvent evaporation technique and their application for the photodegradation of methyl blue (MB). P25 TiO2 nanoparticles dispersed on the surface of PSF microspheres. The porosity, density and photoactivity of the TiNPs/PSF composite microsphere are influenced by the TiO2 loading amount. The composite microsphere showed good methyl blue (MB) removal ability. Compared with TiO2 P25, and PSF, a much higher MB adsorption speed was observed for TiNPs/PSF microspheres benefited from their porous structure and the electrostatic attractions between the MB+ and the negatively charged PSF materials, and showed good degradation efficiency. For TiNPs/PSF composite microsphere with density close to 1, a 100% MB removal (10 mg L−1) within 120 min at a catalyst loading of 2.5 g L−1 can be obtained under both stirring and static condition, due to well dispersing of TiO2 particles on the microsphere surface and its stable suspending in water. For the non-suspended TiNPs/PSF composite microsphere with density bigger than 1, the 100% MB removal can be only obtained under stirring condition. The removal efficiency of MB for the composite microspheres retained 96.5%, even after 20 cycles. Moreover, this composite microsphere also showed high MB removal ability at acidic condition. The high catalysis efficiency, excellent reusability and good stability make this kind of TiNPs/PSF composite microsphere a promising photocatalyst for the water organic pollution treatment.

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Section: Resultsmentioning

confidence: 99%

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

et al. 2021

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“…Furthermore, a separation factor ( R L ) derived from the Langmuir isotherm was applied to evaluate the feasibility of the adsorption process, defined below [35]:RL=11+KLCo…”

Section: Resultsmentioning

confidence: 99%

“…The q e presented an obvious increasing trend and reached 141.62 mg g −1 at 328 K, suggesting that a higher temperature was beneficial for the adsorption of MB onto B- b -S-P microspheres. On the basis of Figure 7a, related thermodynamic parameters were calculated using following, Equations (9) and (10) [35]:sans-serifΔGO=−RTlnKC lnKC=−sans-serifΔHORT+sans-serifΔSOR where sans-serifΔGO (kJ mol −1 ), sans-serifΔHO (kJ mol −1 ) and sans-serifΔSO (J mol −1 K −1 ) represent the changes of Gibbs free energy, enthalpy and entropy, respectively. KC (L g −1 ) is equal to the ratio of q e (mg g −1 ) and C e (mg L −1 ), R (8.314 J mol −1 K −1 ) is the universal gas constant and T (K) means the experimental temperature.…”

Section: Resultsmentioning

confidence: 99%

The Adsorption of Methylene Blue by an Amphiphilic Block Co-Poly(Arylene Ether Nitrile) Microsphere-Based Adsorbent: Kinetic, Isotherm, Thermodynamic and Mechanistic Studies

Zhou

Wang

et al. 2019

Nanomaterials

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Dye pollution is a serious problem in modern society. We desired to develop an efficient adsorbent for the decontamination of discharged dyes. In this work, the polymeric microspheres derived from a kind of amphiphilic block of co-poly(arylene ether nitrile) (B-b-S-P) were prepared on the basis of “oil-in-water” (O/W) microemulsion method. The B-b-S-P microspheres were found competent to remove the cationic dye, methylene blue (MB); and various influential factors, such as contact time, initial concentration, solution pH and temperature were investigated. Results indicated that the maximum adsorption capacity of B-b-S-P microspheres for MB was 119.84 mg/g at 25 °C in neutral conditions. Adsorption kinetics and isotherm dates were well fitted to a pseudo-second-order kinetic model and the Langmuir isotherm model, and thermodynamic parameters implied that the adsorption process was endothermic. The B-b-S-P microspheres also exhibited a highly selective adsorption for cationic dye MB, even in the presence of anionic dye methyl orange (MO). In addition, the possible adsorption mechanism was studied, suggesting that the electrostatic interaction and π–π interaction could be the main force in the adsorption process.

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“…[1,2] During this nucleophilic substitution reaction, HCl is eliminated and highly cross-linked structure of cyclomatrix polyphosphazene (CMPPZ) is formed. The highly cross-linked structure of CMPPZ is biocompatible and biodegradable in nature [3] and used in various applications, such as drug delivery, catalysis, flame retardancy, adsorption of dyes enzyme immobilization, [4][5][6][7][8][9][10][11] composites, [12] membranes, [13] biomaterials, coating materials and biomedical devices. [14][15][16][17][18][19][20] The HCCP can be easily treated with many monomers to produce micro/nanospheres.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on the Preparation of Cyclomatrix‐Polyphosphazene Based Micro/Nanospheres and Their Application for Drug Release

Mehmood

et al. 2020

ChemistrySelect

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Polyphosphazenes (PPZs) are the hybrid polymers composed of nitrogen and phosphorous atoms linked through alternate single and double bond. For the preparation of cyclomatrix polyphosphazene (CMPPZ) based micro/nanospheres, hexachlorocyclotriphosphazene (HCCP) was reacted with monomers containing hydroxyl and amino groups. The cross-linked structure of CMPPZ is biodegradable and biocompatible in nature. The CMPPZ based micro/nanospheres have potential application in the field of biomedical. In this review article, we have described the different ways for the preparation of CMPPZ based micro/nanospheres and their drug release behavior. The average diameter size and surface morphology of the highly cross-linked CMPPZ based micro/nanospheres depended on the concentration of both the monomers. This review article also emphasized on the drug release properties of the CMPPZ based micro/nanospheres.

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Hollow poly(cyclotriphosphazene-co-phloroglucinol) microspheres: An effective and selective adsorbent for the removal of cationic dyes from aqueous solution

Cited by 86 publications

References 41 publications

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

The Adsorption of Methylene Blue by an Amphiphilic Block Co-Poly(Arylene Ether Nitrile) Microsphere-Based Adsorbent: Kinetic, Isotherm, Thermodynamic and Mechanistic Studies

Recent Progress on the Preparation of Cyclomatrix‐Polyphosphazene Based Micro/Nanospheres and Their Application for Drug Release

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