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jitingjian

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Ôõô½âÊÍÏÂÃæÕâ¾ä»°£ºMagnesium chloride hexahydrate and urea were dissolved
in the distilled water followed by the addition of
PEG6000 as dispersant at room temperature. The mixture
was then stirred vigorously for about 4 h at 95C to get the
white basic magnesium carbonate precipitate. Finally,
ammonia solution (25%) was dropped into the resulting
precipitate by a precipitation conversion method to obtain
the Mg(OH)2 precipitate (coded as nanosheets A).
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ZBPJJ529810

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jitingjian: ½ð±Ò+2, ¡ïÓаïÖú 2013-03-12 21:48:12
houchenxmc: ½ð±Ò+1, лл²ÎÓë 2013-03-13 09:13:50
houchenxmc: »ØÌûÖö¥ 2013-03-13 09:13:51
ÎÒ¿´µ½Ò»¸ö×ÊÁÏ£ºMgCl2 + 4CO(NH2)2 = MgCl2.4CO(NH2)2
2Â¥2013-03-12 19:37:37
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jiagle

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jitingjian: ½ð±Ò+5, ¡ï¡ï¡ïºÜÓаïÖú 2013-03-13 08:51:43
houchenxmc: ½ð±Ò+3, лл²ÎÓë 2013-03-13 09:14:00
houchenxmc: »ØÌûÖö¥ 2013-03-13 09:14:01
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1¡¢ÄòËØË®½â
    CO(NH2)2 + 2H2O = (NH4)2CO3
2¡¢¼îʽ̼ËáþÉú³É£¨ÎÄÏ×ÖÐֻ˵̼ËáþÊDz»Ì«×¼È·µÄ£¬Ì¼Ëá¸ùµÄŨ¶È²¢²»»áÌ«¸ß£©
    3CO3(2-) + 2H2O + Mg(2+) = Mg2(OH)2CO3(s) + HCO3(-)
3¡¢°±Ë®¼ÓÈ룬½«³Áµí±íÃæ×ª»¯ÎªMg(OH)2£¨Æ½ºâÒÆ¶¯Ô­Àí£©£¬Ï൱ÓÚcoating£¬¶øÇâÑõ»¯Ã¾µÄ½á¹¹ÊDzã×´£¬ËùÒÔÊÇÆ¬×´°ü¸²(sheet)¡£
    Mg2(OH)2CO3 + 2NH3.H2O = 2Mg(OH)2 + (NH4)2CO3
4Â¥2013-03-13 08:05:18
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jitingjian

Ìú³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by ZBPJJ529810 at 2013-03-12 19:37:37
ÎÒ¿´µ½Ò»¸ö×ÊÁÏ£ºMgCl2 + 4CO(NH2)2 = MgCl2.4CO(NH2)2

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3Â¥2013-03-12 21:48:02
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jitingjian

Ìú³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
4Â¥: Originally posted by jiagle at 2013-03-13 08:05:18
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1¡¢ÄòËØË®½â
    CO(NH2)2 + 2H2O = (NH4)2CO3
2¡¢¼îʽ̼ËáþÉú³É£¨ÎÄÏ×ÖÐֻ˵̼ËáþÊDz»Ì«×¼È·µÄ£¬Ì¼Ëá¸ùµÄŨ¶È²¢²»»áÌ«¸ß£©
    3CO3(2-) + 2H2O + Mg(2+) = Mg2(OH)2CO3(s) + HCO3(-)
3 ...

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5Â¥2013-03-13 08:52:15
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jiagle

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5Â¥: Originally posted by jitingjian at 2013-03-13 08:52:15
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jitingjian

Ìú³æ (СÓÐÃûÆø)

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6Â¥: Originally posted by jiagle at 2013-03-13 10:09:12
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7Â¥2013-03-13 11:21:55
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jiagle

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fds329: ½ð±Ò+1, ¸Ðл»ØÌû 2013-03-16 09:51:25
ÒýÓûØÌû:
7Â¥: Originally posted by jitingjian at 2013-03-13 11:21:55
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8Â¥2013-03-13 12:28:14
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jitingjian

Ìú³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
8Â¥: Originally posted by jiagle at 2013-03-13 12:28:14
ÕâÒÑÊǺܻù´¡µÄ֪ʶÁË£¬ÕÒÎÄÏ׿ÖÅÂÌ«¹ÅÀÏÁË¡£...

9Â¥2013-03-13 13:00:00
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cs104

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fds329: ½ð±Ò+2, ¸Ðл»ØÌû 2013-03-16 09:51:36
MgCO3 ÈܶȻý 3.5¡Á10^-8

Mg(OH)2 ÈܶȻý 1.8¡Á10^-11

ÐÂÖÆµÄMgCO3 ¿ÉÒÔת»¯ÎªMg(OH)2
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