Yanagimachi Akimaro, Kono Takayuki, Ota Kota, Torita Takeshi, Bonilla Daja R, Autrey Daniel E, Badr Hussein O, Barsoum Michel W
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto 617-8555, Japan.
Department of Chemistry & Materials Science, Fayetteville State University, Fayetteville, North Carolina 28301, United States.
Langmuir. 2024 Aug 13;40(32):16929-16935. doi: 10.1021/acs.langmuir.4c01689. Epub 2024 Jul 17.
The novel material, one-dimensional lepidocrocite (1DL) titanate, is attracting industrial and scientific interest because of its applicability to a wide range of practical applications and its ease of synthesis and scale up of production. In this study, we investigated the CO adsorption capability and pore structures of 1DL freeze-dried and lithium chloride washed air-dried powders. The synthesized 1DL was characterized by X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. Using the constant-volume method, CO gas adsorption revealed that the 1DL exhibits type IV adsorption-desorption isotherms. The heats of adsorption obtained from the adsorption branches are lower than those obtained from the desorption branches. Brunauer-Emmett-Teller (BET) analysis, using N gas adsorption isotherms at 77 K showed that 1DL possesses 80.2 m/g of BET specific surface area. Nonlocal density functional theory analysis indicated that two types of pores, meso-pores and ultramicro pores, exist in the 1DL freeze-dried powders. This work provides deep insights into the pore structures and CO adsorption mechanisms of 1DL powders.
新型材料一维纤铁矿（1DL）钛酸盐因其在广泛实际应用中的适用性以及易于合成和扩大生产规模而引起了工业界和科学界的兴趣。在本研究中，我们研究了1DL冻干粉末和经氯化锂洗涤的空气干燥粉末的CO吸附能力和孔结构。通过X射线衍射、拉曼光谱和扫描电子显微镜对合成的1DL进行了表征。使用恒容法，CO气体吸附表明1DL呈现IV型吸附-解吸等温线。从吸附分支获得的吸附热低于从解吸分支获得的吸附热。使用77 K下的N2气体吸附等温线进行的Brunauer-Emmett-Teller（BET）分析表明，1DL的BET比表面积为80.2 m²/g。非局部密度泛函理论分析表明，1DL冻干粉末中存在两种类型的孔，即中孔和超微孔。这项工作为1DL粉末的孔结构和CO吸附机制提供了深入的见解。
