Search results

Hexagonal NaYF4 nanotube arrays obtained via solvothermal process Li Tian1,2,a, Jin Liu1 , Feiyu Chen1 , Qiliang Sun1 1 School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China 2 School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China altian@hnust.edu.cn Keywords: Synthesis, Fluorides, Characterization Methods, Microstructure, Nanomaterials Abstract.
The as-synthesized hexagonal sodium yttrium fluoride composed of hollow-structured nanotubes self-assembled and arrayed orientedly to take on bamboo raft morphology.
It is believed that the novel oriented arrays and hollow structures of hexagonal NaYF4 functional materials would optimize the photoelectric performances and have potential applications in photoelectric crystals.
The structure of the as-prepared samples was further verified by IR spectroscopy, which provided a straight forward molecular identification of the chemical species.
The especial oriented arrays composed of hollow-structured nanotubes would optimize the photoelectric performances of NaYF4 crystals in the application.

Effects of Mixed Template on Pore Structure of Order of Crack-free Monolithic Mesoporous Carbon Jian Jiaoa, Yonghong Cuia, Yu Caia, Lei Wanga, Panpan Lva Department of Applied Chemistry, Northwestern Polytechnical University, Xi' an 710072, China ayhcui@mail.nwpu.edu.cn Keywords: Mixed template, monolithic mesoporous carbons, worm-hole structure.
The results indicated that mesoporous carbon are worm-like structure when use F127/P123 as composite template.
From the TEM images shown in Fig. 1, the structures of SF-1 (a), SFP33 (b), SFP50(c), SFP67(e) and SP-1(f) are all worm-hole pore structures, and not the different between them .
The pore structure, pore size and wall thickness were affected by the composition of the triblock copolymers.
Mesoporous carbon are worm-like structure when use F127/P123 as mixed template.

PSAPE shows a block structure, PPAPE presents a bedding architecture.
Journal of Fluorine Chemistry 2004, 125 (8), 1241-1245
H.; Watanabe, M., Physicochemical properties and structures of room temperature ionic liquids. 2.
Journal of Physical Chemistry B 2005, 109 (13), 6103-6110
Journal of Materials Chemistry A 2013, 1 (18), 5479-5486

At present, the thermodynamic method of research is widely used in various fields of physics, chemistry, biology, and many other sciences and branches of technology.
Kovalov, Fire resistance of reinforced concrete and steel structures, Kharkiv: РС Тechnology center, 180 (2021) 1-166
Bykanov, The structure of the BaO-Al2O3-Fe2O3 system, Refractories and technical ceramics, 7- 8 (2002) 21-24
Hrebenshchykov, Thermal studies of barium silicates and aluminates in the BaO-Al2O3-SiO2 system, Silicates and oxides in high temperature chemistry, M.: Yzd.
Alekseev, Investigation of the reaction in a system, containing BaS, SiO2, Al2O3, Fe2O3, H2O, Journal of Applied Chemistry, 158 (11) (1975) 2445-2447.

Besides, the chemical structure of the intermediate and the final product were certified by fourier transform infrared spectroscopy. 1.
By shearing, the reversible formation of a continuous three-dimensional structure will be found even at a low concentration of VES.
At higher concentrations, the gellike supermolecular structure is already formed in the quiescent state.
Zhang, Oilfield Chemistry 22(2005) 307-310
Liu, Oilfield Chemistry, 22(2006) 302-306

Preparation and characterization of electrospun carbon nanofibers with Na2CO3/H3PO4 activation Ji-Sun Im 1,a , Soo Jin Park2,b, and Young-Seak Lee 1,3,c, * 1 Department of Nanotechnology, Chungnam National University, Daejeon 305-764, Korea 2 Department Chemistry, Inha University, 253, Nam-Gu, Incheon 402-751, Korea 3 Department of Fine Chemical Engineering and Chemistry, Chungnam National University, Daejeon 305-764, Korea a eujs3915@cnu.ac.kr, bsjpark@inha.ac.kr, c,*youngslee@cnu.ac.kr Keywords: Carbon nanofiber, Electrospinning, Chemical activation, Na2CO3, H3PO4 Abstract.
Pore structures of activated CNFs were developed with increasing surface area and pore volume through activation.
Chemical activation can lead to unique pore structures according to chemical agents.
In this paper, pore structure was studied by comparing Na2CO3 and H3PO4 activated CNFs.
To develop pore structure of CNFs, Na2CO3 and H3PO4 chemical activation was conducted.

A Novel Process for Synthesis of Cyclohexyl Ferulate Xiangwen Kong a, Han Wang b, Zhaojing LI c, Jing Zhang d Department of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China akxwwz12168@163.com, bmgc785178875@126.com, clizhaojing1984@163.com, dzhangjingyj@163.com Keywords: cyclohexyl ferulate, silica, sodium bisulfate, catalysis, synthesis Abstract.
The structure of the product was characterized by IR, 1H NMR and MS spectrum.
The results show that the structure of the target product is correct.
Journal of Agricultural and Food Chemistry, 2002, 50(7): 2161-2168
Journal of Agricultural and Food Chemistry, 2006, 54(15):5375-5381

This fact also used preparative directly linked with other tools such as mass spectrometry to determine the structure of compounds that have been separated [29].
Journal of Industrial and Engineering Chemistry 18 (2204-2210), November 2012 [16].
Arabian Journal of Chemistry 5 (361-373), July 2012 [17].
Arabian Journal of Chemistry, October 2010 [18].
Arabian Journal of Chemistry, March 2011 [21].

It is suggested that the La3+ cation has succeeded in replacing the original structure of the cobalt ferrite.
The nanoparticles have a cubic crystal structure with two types of positions located at the tetrahedral (A) and octahedral (B) sites.
It is suspected that the La3+ cation has succeeded in replacing the original structure of the cobalt ferrite [22].
Carrey, Magnetic Hyperthermia Properties of Electrosynthesized Cobalt Ferrite Nanoparticles, The Journal of Physical Chemistry C. 117 (2013) 11405–11411. doi:10.1021/jp4023025
Matsuyama, Annealing temperature dependence of crystalline structure and magnetic properties in nano-powder strontium-substituted cobalt ferrite, Nano-Structures & Nano-Objects. 30 (2022) 100862. doi:10.1016/j.nanoso.2022.100862

Abstract. 2ZnO.3B2O3.nH2O (Zinc borate) having the industrially important composite and used as flame retardant, anti-smoke and semiconductor in the electronic circuits was examined different crystal structures.
The analysis of the crystal structure of the calcined samples at 500°C was conducted by XRD.
Gong, Electrospun nanofibers of NiO/ZnO composite, Inorganic Chemistry Communications, 7 (2004) 625-627
Sevimli, Structure Investigations of NiO/Al2O3/B2O3/SiO2 Composite Based on PVA Using Sol-Gel Processing and the Electrospinning Technique, Asian Journal of Chemistry; Vol. 26, No. 8 (2014) 2293-2295
Jiang, Preparation of zinc borates with different structures and morphologies and their effect on thermal and oxidative stability of polyvinyl alcohol, Powder Technology 237 (2013) 537–542