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一种简单的方法来合成Dy(OH) ((3) 和Dy(2) O ((3) 纳米管

An-Wu Xu1, Yue-Ping Fang, Li-Ping You

  • 1School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 510275, China.

Journal of the American Chemical Society
|February 6, 2003
PubMed
概括

研究人员用一种简单的热水方法合成了双 (III) 氧化物 (Dy) 和双 (III) 氧化物 (Dy) 的纳米管. 这种技术还产生了holmium纳米管,表明对稀土氧化物纳米材料的多功能方法.

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相关概念视频

Diazonium Group Substitution: –OH and –H01:19

Diazonium Group Substitution: –OH and –H

Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism01:37

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.