Dual‐Functionalized Hollow Polymer Particle as a pH‐Responsive Adsorbent for Selective Removal of Basic Dye

Abstract

In the present work, novel dual‐functionalized hollow polymer particles (DF‐HPP) with high density of carboxylate and amino dual functional groups have been specially designed and fabricated to serve as high‐performance adsorbent for selective removal of basic dye (methylene blue, b‐MB, as a model dye). Due to both the high surface area and the extremely high density of carboxylate and amino groups, the DF‐HPPs exhibited excellent adsorption property for methylene blue (b‐MB), including high adsorption capacity, fast adsorption/desorption rates, unique pH‐sensitivity and easy recovery. The equilibrium adsorption data of b‐MB on the DF‐HPPs were evaluated using Freundlich and Langmuir isotherm models, and the equilibrium isotherm was better fit with Langmuir model with a maximum adsorption capacity of 538.8 mg/g at pH 12. More interestingly, the DF‐HPPs showed a significant pH‐dependent equilibrium adsorption capacity, which decreased dramatically from 516.1 mg/g to 24 mg/g as the solution pH decreased from 12 to 3. The dye‐adsorbed DF‐HPPs can be facilely and rapidly regenerated under mild condition (under weak acidic solution, pH 3, in 30 min) to recover both b‐MB and the DF‐HPPs, and the regenerated DF‐HPPs can be reused for dye removal with high efficiency, indicating the exceptional recyclability of the DF‐HPPs.

Hollow polymer particles: a review

“…131 Other contributions relating to HPPs have been described by a number of researchers. [132][133][134][135][136][137][138] 6. Applications…”

Janus hollow polymeric hairy microspheres as efficient adsorbents and catalyst scaffolds

“…The adsorbed dyes can be easily desorbed from the magnetic polyacrylamide microspheres, and the polymeric microsphere adsorbents can be repeatedly used for at least 6 cycles without losing the adsorption capacity. Chen et al 36 designed and fabricated novel dualfunctionalized hollow polymer particles (DF-HPP) as a highperformance adsorbent for selective removal of methylene blue. The DF-HPPs exhibited excellent adsorption properties with high adsorption capacity, fast adsorption/desorption rates, unique pH-sensitivity and easy recovery due to the high density of carboxylate and amino groups as well as the high surface area.…”

Síntese, monitoramento e modelagem da formação de partículas poliméricas porosas ocas com casca reticulada.

“…Os autores mostraram que a estrutura porosa oferece alta área de contato e as partículas ocas tiveram desempenho melhor como materiais adsorventes do que as não-ocas. utilizaram a mesma formulação da partícula ocade Chen et al (2016) utilizando uma funcionalização da casca da partícula com grupos amônio (NH4 + ), carregados positivamente, para remoção de azul de metila Chen et al (2017),. dando continuidade ao trabalho de 2016, fizeram uma dupla funcionalização das partículas ocas, tanto com grupos carboxilato, quanto amônio.…”