Cr2O3 前驱体的种类对于后期制备的 Cr2O3 色料的呈色效果影响很大,目前运 用较广的是通过重铬酸盐分解、 CrOOH 分解等, 但是这类方法对于环境污染较重。 因此,需要新型环境友好的制备方法,通过氢氧化铬(Cr(OH)3· xH2O)前驱 体的热分解得到 Cr2O3 这一方法研发了出来,Cr(OH)3· xH2O 是一种普通的...
(Colour online.) 3. Conclusion The need to accommodate an octahedral ion with side arms three atoms long in salts of BEDT-TTF with [Cr(NCS)6]3− can be solved in several ways. Either two ligand side arms are inserted into BEDT-TTF/aromatic solvent stacks at the points where the ...
6 interpretation of results 6.1 positive result formation of a red colour, from light pink to strong cerise, with dimethylglyoxime indicates that the nickel release from a tested surface is likely to be greater than 0,5 g/cm2/week, and a positive result should be reported. formation of a ...
(9) and 2.057(12) Å] and CrO(oxalate) bond lengths [values in the range 1.959(4)–1.974(4) Å] (see Table 3) agree with the corresponding values in the mononuclear complexes XPh4[Cr(pyim)(ox)2]·H2O (X = P and As) and double chain compound {Ba(H2O)3/2[Cr(pyim)(ox)2...
When 2–4 drops of order to change the pH of the sdoilluuttieoNn Han3d·Hth2Oen(t2h me nole·wdmm−i3x)tuwreerwe aasdfduerd- ther heated to 70 °C for 30 minutes under stirred condition, the hexagonal prism-shaped nano rods were in-situ transformed to another new green nano...
采用共沉淀法[1,3,4]制备离子浓度为[M2+]∶[M3+]=2的Mg/AlHT以及Co/Mg/Al和Mg/Al/Cr的三元HTLcs还有二价和三价同时部分替换的Co/Mg/Al/Cr的四元HTLcs. 按一定比例将Co(NO3)2·6H2O、Mg(NO3)2·6H2O、Al(NO3)3·9H2O、Cr(NO3)3·9H2O配制成100?mL阳离子浓度为1?mol·L-1硝酸盐水溶液(I...
Briefly, 1.16 g Fe(NO3)3·9H2O and 4.66 g Ni(NO3)2·6H2O were dissolved in 200 mL of deionised water whilst stirring for 20 min. Then, 3.46 g urea was added while stirring the solution for 30 min. The suspension was then transferred into a Teflon-lined autoclave and heated for 18...
Colour and habit red purple, column red, prism colorless, column Crystal size (mm) 0.38×0.20×0.20 0.32×0.23×0.17 0.24×0.18×0.12 Crystal system orthorhombic orthorhombic orthorhombic Unit cell dimension a (Å) 15.882(5) 15.809(5) 15.796(3) b (Å) 18.702(4) 18.361(4) 18.502(4) c...
Synthesis and structural characterization of Cr2O3 nanoparticles prepared by using Cr(NO3)3.9H2O and triethanolamine under microwave irradiation. Adv. Phys. Theor. Appl. 2015, 44, 139–148. 39. Jaswal, V.S.; Arora, A.K.; Kinger, M.; Gupta, V.D.; Singh, J. Synthesis and ...