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Updated: Jan 15, 2026

Preparation of Carbon Nanosheets at Room Temperature
Published on: March 8, 2016
Diffusion-enhanced AEL zeotype nanosheet macrostructures with shortened c-axis for superior hydroisomerization of
Xiaoming Liu1, Zhuoqi Wang1, Xinning Song1
1College of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng, Shandong 252059, PR China.
Abstract:
The rational synthesis of high-aspect-ratio zeolite nanosheets remains challenging despite their potential to overcome diffusion limitations in catalysis. Herein, we report a facile mesoporogen-free strategy for synthesizing nanosheet-like AEL-type aluminophosphate macrostructures (AP11-N; 20-50 nm thickness) in an ethylene glycol-based eutectic mixture. Mechanistic studies reveal that diethylamine (DEA) directs anisotropic growth by selectively adsorbing on (200) surfaces, suppressing c-axis development and enabling hierarchical porosity. Magnesium incorporation (MgAP11-N) enhances Brønsted acidity (27.9 vs. 8.8 μmol Py g-1 for conventional MgAP11-C) and textural properties (BET surface area: 227 vs. 142 m2 g-1). The Pt-loaded catalyst (Pt/MgAP11-N) delivers superior n-dodecane (n-C12) hydroisomerization performance, achieving an isomer yield of 82.4 % (330 °C, 2 MPa, WHSV = 2 h-1) - significantly exceeding Pt/MgAP11-C (68.3 % at 350 °C) - and exceptional stability (>100 h). This enhancement stems from shorted diffusion paths, optimized metal-acid balance, and rapid desorption of monobranched intermediates, suppressing secondary cracking. This work establishes a facile route to high-performance nanosheet catalysts for industrial applications.
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