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Featured researches published by Xuemin Cui.


Journal of Materials Chemistry B | 2017

Facile synthesis of hierarchical N-doped hollow porous carbon whiskers with ultrahigh surface area via synergistic inner–outer activation for casein hydrolysate adsorption

Xin He; Pengru Liu; Jing Liu; Yaseen Muhammad; Meiping Zhu; Jianhua Sun; Xuemin Cui; Dankui Liao; Zhangfa Tong

N-doped hollow porous carbon materials have attracted significant scientific interest in the field of peptide adsorption, drug delivery and catalysis. However, their facile synthesis is still a challenge due to the lack of an ideal template and effective route for high specific surface area (SSA). In this work, we report a facile approach for preparing N-doped hollow porous carbon whiskers (HPCWs) by using CaCO3 whiskers as a green template and double inner-activating agent. Two inner activators, CO2 and Ca(OH)2, are generated from the CaCO3 whisker template during the carbonization process. Among them, Ca(OH)2 was formed by H2O vapors reacting with the remaining template CaO. Attributed to the drastic synergistic effect of inner-activation (CO2 or Ca(OH)2) and outer-activation (KOH), the synthesized HPCWs exhibit ultrahigh SSA (3007 m2 g-1), the largest pore volume (2.63 cm3 g-1) and a controllable proportion of micropores (Sm/St, 60-86%). These intriguing pore structure characteristics of HPCWs endow with them rich target-oriented applications, as exemplified by their outstanding adsorption for casein hydrolysate (10 080 mg g-1), which is two orders of magnitude (102) higher than that of common porous materials. This facile and green synthesis strategy may pave a new way to prepare hollow porous carbon materials with the desired pore structure and high surface area for numerous applications.


Chinese Journal of Chemical Engineering | 2012

Al2O3-2SiO2 Nanoparticles with Defined Al-Si Ratio: Processing Optimization and Conversion

Guangjian Zheng; Xuemin Cui; Weipeng Zhang; Zhangfa Tong; Feng Li

Abstract Attempts had been made to synthesize Al 2 O 3 -2SiO 2 nanopowders by sol-gel method with tetraethoxysilane (TEOS) and aluminum nitrate (ANN) as the starting materials. DTS, TEM, SEM and BET were employed to study the effects of process parameters on the size, specific surface area and structure (morphology) of powders. The alkali-activation reactivity of the powders was tested for manufacturing geopolymers and their hydrothermal reactions were performed for fabricating zeolites. The results show that the optimum process parameters and drying method for preparing Al 2 O 3 -2SiO 2 nanopowders are as follows: the molar ratio of water and ethanol to TEOS are 0:U1 and 12:U1 respectively at synthetic temperature of 50° and the drying method is azeotropic distillation with microwave drying. The average particle diameters of the powders were about 70 nm and the largest BET specific surface area was up to 669 m 2 ·g −1 . The compressive strength of the geopolymer and the calcium exchange capacity (by CaCO 3 ) of NaA zeolite prepared with the powders reached to 29 MPa and 366 mg·g −1 respectively.


Journal of Materials Science | 2009

Preparation of geopolymer precursors by sol–gel method and their characterization

Guangjian Zheng; Xuemin Cui; Weipeng Zhang; Zhangfa Tong


Materials Chemistry and Physics | 2011

A novel aluminosilicate geopolymer material with low dielectric loss

Xuemin Cui; Leping Liu; Yan He; Jinyu Chen; Ji Zhou


Chemical Communications | 2017

N-Doped porous graphitic carbon with multi-flaky shell hollow structure prepared using a green and ‘useful’ template of CaCO3 for VOC fast adsorption and small peptide enrichment

Xin He; Huaju Sun; Meiping Zhu; Muhammad Yaseen; Dankui Liao; Xuemin Cui; Haoyu Guan; Zhangfa Tong; Zhenxia Zhao


Ceramics International | 2010

Different microstructure BaO–B2O3–SiO2 glass/ceramic composites depending on high-temperature wetting affinity

Xuemin Cui; Yan He; Zhong-yuan Liang; He Zhang; Ji Zhou


Applied Clay Science | 2013

Hot-pressure forming process of PVC/geopolymer composite materials

Xiao-ling Song; Xuemin Cui; Kunsheng Lin; Guang-jian Zheng; Yan He


Archive | 2012

Geopolymeric light porous material and preparation method thereof

Xuemin Cui; Kunsheng Lin; Jinyu Chen; Junli Yu; Jinglin Huang


Ceramics International | 2016

Preparation and characterization of acid-based geopolymer using metakaolin and disused polishing liquid

Chang-ming Guo; Kai-tuo Wang; Meng-yi Liu; Xuan-hai Li; Xuemin Cui


Particuology | 2012

Preparation of nano-sized Al2O3–2SiO2 powder by sol–gel plus azeotropic distillation method

Guangjian Zheng; Xuemin Cui; Weipeng Zhang; Zhangfa Tong; Feng Li

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Feng Li

Beijing University of Chemical Technology

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