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...
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...
Crystals of yellow [V(NH3)(6)]I-2 and green [Cr(NH3)(6)]I-2 were obtained by the reaction of VI2 and CrI2 with liquid ammonia at room temperature. Colourless crystals of [Mn(NH3)(6)]Cl-2 were obtained from Mn and NH4Cl in supercritical ammonia. Colourless transparent crystals of...
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...
A. 高温加热装置中发生的反应为3Fe(s)+4H2O(g)===高温Fe3O4(s)+4H2(g) B. 虚线框处宜选择的装置是甲 C. 实验时将螺旋状铜丝加热变黑后再趁热迅速伸入试管中,可观察到铜丝由黑色变为红色 D. 实验后,可用铝粉在高温下还原玻璃管中的固体获得铁单质 查看完整题目与答案 创伤性休克的...
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...
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