封装热解同步沉积法制备结构可调的中空碳球及其在头孢氨苄吸附中的应用

doi:10.15541/jim20190276

无机材料学报 ›› 2020, Vol. 35 ›› Issue (5): 608-616.DOI: 10.15541/jim20190276

封装热解同步沉积法制备结构可调的中空碳球及其在头孢氨苄吸附中的应用

杜娟,刘磊,于奕峰,张越,吕海军,陈爱兵()

河北科技大学化学与制药工程学院, 石家庄 050018

收稿日期:2019-06-06 修回日期:2019-08-31 出版日期:2020-05-20 网络出版日期:2019-09-18
作者简介:杜鹃(1992-), 女, 博士研究生. E-mail: dujuan_chemistry@163.com<br/>DU Juan(1992–), female, PhD candidate. E-mail: dujuan_chemistry@163.com

Hollow Carbon Sphere with Tunable Structure by Encapsulation Pyrolysis Synchronous Deposition for Cefalexin Adsorption

DU Juan,LIU Lei,YU Yifeng,ZHANG Yue,LÜ Haijun,CHEN Aibing()

College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China

Received:2019-06-06 Revised:2019-08-31 Published:2020-05-20 Online:2019-09-18
Supported by:
National Natural Science Foundation of China(21676070)

摘要/Abstract

摘要：

本研究报道了一种简便的封装热解同步沉积方法, 并可控地制备了直径和壳厚度可调的中空碳球。该方法通过在密闭的二氧化硅壳中热解和同步沉积过程, 将广泛用作牺牲硬模板的聚苯乙烯球转化为碳。实现了聚苯乙烯在致密的二氧化硅壳中通过热解和沉积过程转化为碳, 无需任何交联剂和催化剂, 减少了操作步骤和降低了生产成本。所获得的中空碳球显示出均匀的球形形态, 具有可调节的颗粒尺寸(190~1600 nm)和良好控制的介孔结构。此外, 通过改变二氧化硅前体的用量, 获得具有精确调节的厚度(4.5~13.5 nm)的碳材料。所得的样品具有头孢氨苄吸附作用, 显示出良好的应用前景。此外, 这种合成策略为碳材料生产提供了一种有效的途径, 有助于其商业应用。

关键词: 空心碳球, 封装热解同步沉积, 可调结构, 头孢氨苄吸附

Abstract:

Hollow carbon spheres (HCS) with controllable diameter and shell thickness using a simple encapsulation pyrolysis synchronous deposition method is reported. This method changed the polystyrene spheres (PS), a widely used sacrifice hard template, into carbon by a pyrolysis and synchronous deposition process in the hermetical silica shell, without any cross-linking agent and catalyst, simplifying synthesis, and lowering costs. The obtained HCS exhibited uniform spherical morphology with tailorable particle size (190-1600 nm) and well controlled hollow voids. Moreover, HCS samples with precisely tuned thickness (4.5-13.5 nm) were obtained only by changing the silica precursor amount. The resultant HCS showed promising potential for applications in cefalexin adsorption with capacity of 291 mg·g ^-1. Therefore, this synthetic strategy may offer an efficient production route to commercial applications for HCS.

Key words: hollow carbon spheres, encapsulation pyrolysis synchronous deposition, tunable structure, cefalexin adsorption

中图分类号:

TQ174

杜娟, 刘磊, 于奕峰, 张越, 吕海军, 陈爱兵. 封装热解同步沉积法制备结构可调的中空碳球及其在头孢氨苄吸附中的应用[J]. 无机材料学报, 2020, 35(5): 608-616.

DU Juan, LIU Lei, YU Yifeng, ZHANG Yue, LÜ Haijun, CHEN Aibing. Hollow Carbon Sphere with Tunable Structure by Encapsulation Pyrolysis Synchronous Deposition for Cefalexin Adsorption[J]. Journal of Inorganic Materials, 2020, 35(5): 608-616.

图/表 6

Fig. 1 Preparation routes and TEM (b,c) and SEM (c) images (a) Schematic illustration of the synthesis of the HCS (Route 1) and hollow mesoporous silica spheres (Route 2); (b) TEM image of PS@mSiO2; (c) TEM and SEM images of mSiO2

Fig. 2 TEM images of PS@SiO2 hybrids sphere (a-c) and HCS-1 (d-f)

Fig. 3 TEM images of HCS-1.5 (a-c) and HCS-0.5 (d-f), the relationship between TEOS amount and HCS thickness (g), and schematic illustration for the pyrolysis deposition of the PS inside the mesoporous silica shell (h) and the silica shell encapsulation nanoreactor (i), TGA analyses of PS and PS@SiO2 samples in N2 (j) and air (k)

Fig. 4 N2 adsorption-desorption isotherms (a) and pore distributions (b) of HCS, XRD patterns of HCS-1 (c), XPS spectra of HCS-1 (d), C1s (e) and O1s (f) spectra of HCS-1

Fig. 5 SEM images of HCS with dimeter size of 400, 900 and 1600 nm obtained by changing the dimeter of PS (a-c) and N2 adsorption-desorption isotherm (d) and pore distribution (inset) of HCS

Fig. 6 Adsorption curve of cefalexin over HCS-1 for the contact time (a), various initial concentrations (b), and corresponding Kinetics (c-d) and isothermal (e-f) fittings

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封装热解同步沉积法制备结构可调的中空碳球及其在头孢氨苄吸附中的应用

Hollow Carbon Sphere with Tunable Structure by Encapsulation Pyrolysis Synchronous Deposition for Cefalexin Adsorption

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