A Sustainable Technique to Prepare High-Purity Vanadium Pentoxide via Purification with Low Ammonium Consumption.
A Sustainable Technique to Prepare High-Purity Vanadium Pentoxide via Purification with Low Ammonium Consumption.
复制标题
低氨耗提纯制备高纯五氧化二钒的可持续技术。
DOI：
10.3390/ma15051945
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发表时间：
2022-03-05
期刊：
影响因子：
--
通讯作者：
Hu P
中科院分区：
文献类型：
--
作者：
Lin G;Huang J;Zhang Y;Hu P
V_2O_5的制备一般采用铵盐沉钒法，这不可避免地产生大量的氨氮废水。本文提出了一种环境友好的低氨耗制备高纯V2 O 5的方法。V2 O 5产品纯度达到99%以上，同时降低了氨耗水平。在沉淀时间1.5 h、沉淀温度98 °C、沉淀初始pH值2、铵添加系数2、净化时间5 min、净化2次、净化温度65 °C的条件下，沉钒效率达99.23%，产品V2 O 5纯度达99.05%。与氨水沉钒和铵盐沉钒相比，氨耗分别降低79.80%和80.00%，纯度分别提高0.70%和1.01%。通过XRD对沉淀产物（NaV 3 O 8·xH 2 O）和纯化产物（（NH 4）2 V6 O 16·1.5H2O）的组成进行了表征。TGA结果表明，NaV_3O_8·xH_2O含有1.5倍量的结晶水。FTIR结果解释了两个V3 O 8 −层首尾相连形成V6 O 162 −层。产品图像的变化表明净化过程包括三个阶段。首先，加热和NH 4+侵蚀使V3 O 8 −层膨胀。NH 4+更容易扩散到V3 O 8 −层中。其次，NH 4+破坏了Na+与V3 O 8 −层之间的静电相互作用，并取代了Na+。最后，V3 O 8-聚合成V6 O 162-，以保持晶体结构稳定。
The general preparation method for V2O5 is ammonium salt vanadium precipitation, which inevitably produces large amounts of ammonia nitrogen wastewater. In this paper, we propose an environmentally friendly method for preparing high-purity V2O5 with low ammonium consumption. The purity of the V2O5 product reaches more than 99% while reducing the level of ammonium consumption. The vanadium precipitation efficiency reaches 99.23% and the V2O5 purity of the product reaches 99.05% under the following conditions: precipitation time of 1.5 h, precipitation temperature of 98 °C, initial precipitation pH of 2, ammonium addition coefficient of 2, purification time of 5 min with purification performed twice, purification temperature of 65 °C. In this study, compared with the use of ammonia spirit for vanadium precipitation and ammonium salt vanadium precipitation, the ammonia consumption levels are reduced by 79.80% and 80.00%, and the purity levels are increased by 0.70% and 1.01%, respectively. The compositions of the precipitated (NaV3O8∙xH2O) and purified ((NH4)2V6O16·1.5H2O) hydrolysis products are characterized via XRD. The TGA results show that NaV3O8∙xH2O contains 1.5 times the amount of crystal water. The FTIR results explain that the two V3O8− layers are combined end-to-end to form a V6O162− layer. The change of the product image indicates that the purification process includes three stages. Firstly, heating and NH4+ attack expand the V3O8− layer. NH4+ diffuses more easily into the V3O8− layer. Secondly, NH4+ destroys the electrostatic interaction between Na+ with the V3O8− layer and replacing Na+. Finally, V3O8− is polymerized into V6O162− to keep the crystal structure stable.
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影响因子：
3.2
作者：
Jin, Aiping;Chen, Wen;Zakharova, Galina S.
通讯作者：
Zakharova, Galina S.
DOI：
10.1107/s0108270199007702
发表时间：
1999-12-15
期刊：
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS
影响因子：
--
作者：
Lin, BZ;Liu, SX
通讯作者：
Liu, SX
DOI：
10.1007/s10854-021-07492-z
发表时间：
2022-01-07
影响因子：
2.8
作者：
Thangarasu, R.;Kulathuraan, K.;Ali, Atif Mossad
通讯作者：
Ali, Atif Mossad
通过原位聚苯胺插层调节 V2O5 中锌离子插入/脱出的动力学，可提高水相锌离子存储性能
影响因子：
29.4
作者：
Liu, Sucheng;Zhu, He;Li, Cheng Chao
通讯作者：
Li, Cheng Chao
DOI：
10.1016/j.physe.2013.12.022
发表时间：
2014-05-01
影响因子：
3.3
作者：
Chithaiah, Pallellappa;Kumar, Gangaiah Vijaya;Chandrappa, Gujjarahalli Thimmanna
通讯作者：
Chandrappa, Gujjarahalli Thimmanna