Lamellar {gamma}-AlOOH architectures: Synthesis and application for the removal of HCN

Journal Article · Fri Jun 15 00:00:00 EDT 2012 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2012.03.001· OSTI ID:22066453

You, Zhu ^[1]; Gangling, Tang ^[2]

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1. China National Tobacco Corporation Shandong Branch (China)
2. China National Tobacco Quality Supervision and Test Center, No. 2 Fengyang Street, Zhengzhou High and New Technology Industries Development Zone, Zhengzhou, 450001 (China)

Using hexadecyl trimethyl ammonium bromide (CTAB) as a structure-directing agent and precipitator, the complete synthesis of lamellar {gamma}-AlOOH architectures was successfully accomplished via a hydrothermal route. Different product structures were obtained by varying the molar ratio of aluminum nitrate and CTAB. Several techniques, including X-ray powder diffraction, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, and differential scanning calorimetry thermal analysis, were used to characterize the products. The effects of CTAB concentration, reaction temperature and time, and the molar ratio of Al{sup 3+}/CTAB on the product morphologies were investigated. The nitrogen adsorption and desorption measurements indicated that the {gamma}-AlOOH architectures possess a Brunauer-Emmett-Teller surface area of approximately 75.02 m{sup 2}/g. It was also demonstrated that 10 mg {gamma}-AlOOH architectures can remove 45.3% of the HCN (1.68 {mu}g/mL) from model wastewater. When 0.03 mg/cig {gamma}-AlOOH architectures were combined with cigarette paper, 8.12% of the present HCN was adsorbed. These results indicate that lamellar {gamma}-AlOOH architectures may be a potential adsorbent for removing HCN from highly toxic pollutant solutions and harmful cigarette smoke. Highlights: Black-Right-Pointing-Pointer Hexadecyl trimethyl ammonium bromide (CTAB) was used as a structure-directing agent and precipitator. Black-Right-Pointing-Pointer Hydrothermal treatment enables growth of lamellar {gamma}-AlOOH architectures. Black-Right-Pointing-Pointer Lamellar {gamma}-AlOOH architectures were demonstrated to exhibit high BET surface area and excellent adsorptive capacity. Black-Right-Pointing-Pointer HCN in contaminated water and cigarette smoke can be effectively removed by the prepared lamellar {gamma}-AlOOH superstructures.

• OSTI ID: 22066453
• Journal Information: Materials Characterization, Vol. 68, Issue Complete; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
ADSORBENTS
ADSORPTION
ALUMINIUM IONS
ALUMINIUM NITRATES
AMMONIUM COMPOUNDS
BROMIDES
CALORIMETRY
DESORPTION
DIFFERENTIAL THERMAL ANALYSIS
FIELD EMISSION
HYDROCYANIC ACID
SCANNING ELECTRON MICROSCOPY
SOLUTIONS
SURFACE AREA
TOBACCO SMOKES
TRANSMISSION ELECTRON MICROSCOPY
WASTE WATER
X-RAY DIFFRACTION