258273-75-5Relevant articles and documents
Electrodeposition of crystalline silicon directly from silicon tetrachloride in ionic liquid at low temperature
Zhang, Junling,Chen, Shimou,Zhang, Haitao,Zhang, Suojiang,Yao, Xue,Shi, Zhaohui
, p. 12061 - 12067 (2016)
Crystalline silicon (Si) is widely used in modern electronics. Si is commonly produced through a series of energy-intensive reactions (>700 °C). It is thus urgent and significant to explore more economically and environmentally-benign synthetic strategies for crystalline Si at low temperature. In this contribution, we report an efficient method to prepare crystalline Si from silicon tetrachloride at the low temperature of 100 °C with an ionic liquid (IL) as electrolyte. Physicochemical characterization revealed that as-deposited crystalline Si with a diamond cubic crystal structure exhibited a dominant (111)-orientation. Moreover, in-depth insights into the growth mechanism of crystalline Si was shed light upon herein. Furthermore, the smart electrodepositing platform of crystalline Si from ILs would open up a new avenue for low-temperature metallurgy of Si.
Sonochemical synthesis of 0D, 1D, and 2D zinc oxide nanostructures in ionic liquids and their photocatalytic activity
Alammar, Tarek,Mudring, Anja-Verena
experimental part, p. 1796 - 1804 (2012/04/04)
Ultrasound synthesis of zinc oxide from zinc acetate and sodium hydroxide in ionic liquids (ILs) is a fast, facile, and effective, yet highly morphology- and size-selective route to zinc oxide nanostructures of various dimensionalities. No additional organic solvents, water, surfactants, or templating agents are required. Depending on the synthetic conditions, the selective manufacturing of 0D, 1D, and 2D ZnO nanostructures is possible: Whereas the formation of rodlike structures is typically favored, ZnO nanoparticles can be obtained either under strongly basic conditions or by use of ILs with a long alkyl chain, such as 1-n-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([Cnmim][Tf2N]; n>8). A short ultrasound irradiation time favors the formation of ZnO nanosheets. Prolonged irradiation leads to the conversion of the ZnO nanosheets into nanorods. In contrast, ionothermal synthesis (conventional heating) does not allow for morphology tuning by variation of the IL or other synthesis conditions, as the longer reaction times required lead always to the formation of well-developed hexagonal nanocrystals with prismatic tips. The ZnO nanostructures synthesized by using ultrasound were efficient photocatalysts in the photodegradation of methyl orange. The photoactivity was observed to be as high as 95 % for ZnO nanoparticles obtained in [C10mim][Tf 2N].
IONIC COMPOUND
-
Page/Page column 13, (2008/06/13)
PROBLEM TO BE SOLVED: To provide a salt melting at normal temperature, exhibiting a low-viscosity liquid shape at room temperature, having sufficiently high electroconductivity, and useful as an electrolyte or electrolysis solution for an electrochemical device such as a secondary battery, an electric double layer capacitor, a fuel battery, and a dye-sensitized solar battery, or a solvent for organic synthesis. SOLUTION: The ionic compound is represented by formula (1): C+A- (1) [wherein, A- is an anion represented by structural formula (2): FSO2-N(-)-SO2CnF2n+1 or structural formula (3): FSO2-N(-)-COCnF2n+1 {in structural formulas (2) and (3), n is an integer of 1-5}; C+ is a cation represented by formulas (4), (5), (6), (7), (8), (9), (10) or (11) {in general formulas (4) to (8), R1 to R6 are each independently a hydrogen atom, a halogen atom, a 1-5C alkyl group, an aralkyl group, an alkynyl group or an alkoxyalkyl group} and {in general formulas (9) to (11), R1 to R4 are each independently a 1-6C alkyl group, an aralkyl group, an alkynyl group or an alkoxyalkyl group; with the proviso that any two groups in R1 to R4 may form a ring by bonding to each other}].
