 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 4 | 1/1 | 返回列表 |
| 查看: 977 | 回復: 3 | |||
| 本帖產(chǎn)生 2 個 翻譯EPI ，點擊這里進行查看 | |||
LBC8306木蟲 (小有名氣)
自帶超級無限釋放無CD氧瓶超深
|
[求助]
求助(化學類)�。。。〈蠹�?guī)兔纯捶g的如何，改一改。
|
||
|
碳納米管具有很高的熱穩(wěn)定性和化學惰性等獨特的結構性質，被認為是一種良好的載體。以碳納米管這種具有不同于普通材料特性的物質作為載體，負載氧化鋁來制備能夠高效吸附水溶液中銅離子的復合材料。探討這種復合材料對水中銅離子的吸附性能。 采用把硝酸鋁加入到碳納米管的懸浮液中，然后加入氨水的方法來制備碳納米管負載氧化鋁材料(Al2O3/CNTs)。紅外光譜及差熱分析表明，氧化鋁以γ-Al2O3的形態(tài)負載到碳納米管上，碳納米管負載氧化鋁后，熱穩(wěn)定性降低。通過負載量優(yōu)化發(fā)現(xiàn)，負載量為50%時，Al2O3/CNTs吸附量最大。溶液的pH值對Al2O3/CNTs的吸附能力有顯著影響，對銅離子的吸附能力隨著pH值的降低而降低。隨著銅離子溶液初始濃度的增大，Al2O3/CNTs吸附量逐漸增加，而吸附率逐漸降低。 熱力學研究表明，銅離子在Al2O3/CNTs上的吸附是一個自發(fā)的、放熱、熵增過程。Langmuir吸附模型可以很好的描述吸附過程。從Langmuir吸附等溫線得出，Al2O3/CNTs對銅離子的最大吸附能力Qmax為44.445 mg/g。動力學研究表明，該吸附行為可以由準二級速率方程很好地描述。 Carbon nanotubes with unique morphologis such as high thermal stability and chemically inert nature, is considered a good carrier. Carbon nanotubes being a novel kind of carriers for its difference from common ones were studied to efficiently remove copper ion in water by supported alumina. There is discussion on the adsorption mechanism of this composite absorbent which was used to absorb copper ions in water. The composite absorbent, carbon nanotubes supported alumina materials (Al2O3/CNTs), was prepared through putting aluminium nitrate into suspension of carbon nanotubes, and then a certain ammonia was added. IR and differential thermal analysis(DTA) showed that there isγ-Al2O3 loading on carbon nanotubes. After carbon nanotubes supported alumina, thermal stability is reduced. When 50% alumina is supported, Al2O3/CNTs had a high adsorption capacity. Different solution pH value make a difference. Adsorption of copper ions of Al2O3/CNTs decreased with the decrease of pH. As the initial concentration of the copper ions solution increased, Al2O3/CNTs adsorption increased while adsorption rate reduced. Thermodynamics of copper ions on Al2O3/CNTs showed that this adsorption process was spontaneous, exothermic and with an increase in entropy. Langmuir adsorption model is better for this adsorption process. From Langmuir adsorption isotherm, maximum adsorption capacity Qmax was determined as 44.445 mg/g. Research on adsorption kinetics elucidate that this adsorption could be described by pseudo-second-order kinetics models well. |
回復此樓» 猜你喜歡
299求調劑
已經(jīng)有8人回復
-
一志愿北京理工大學本科211材料工程294求調劑
已經(jīng)有6人回復
-
300求調劑，材料科學英一數(shù)二
已經(jīng)有8人回復
-
招收生物學/細胞生物學調劑
已經(jīng)有5人回復
-
070305高分子化學與物理 304分求調劑
已經(jīng)有7人回復
-
289求調劑
已經(jīng)有13人回復
-
一志愿哈爾濱工業(yè)大學材料與化工方向336分
已經(jīng)有9人回復
-
081200-11408-276學碩求調劑
已經(jīng)有6人回復
-
調劑求院校招收
已經(jīng)有5人回復
-
調劑310
已經(jīng)有8人回復
zerohead
禁蟲 (職業(yè)作家)
- 翻譯EPI: 466
- 應助: 1 (幼兒園)
- 貴賓: 0.301
- 金幣: 8727.8
- 散金: 850
- 紅花: 15
- 沙發(fā): 10
- 帖子: 3768
- 在線: 471.7小時
- 蟲號: 1041741
- 注冊: 2010-06-14
- 性別: GG
- 專業(yè): 邏輯學
【答案】應助回帖
LBC8306(金幣+1, 翻譯EPI+1): 謝謝 2011-05-26 16:03:49
LBC8306(金幣+9): 2011-05-28 18:10:47
LBC8306(金幣+9): 2011-05-28 18:10:47
|
碳納米管具有很高的熱穩(wěn)定性和化學惰性等獨特的結構性質，被認為是一種良好的載體。 這一句里的“結構性質”，不能用 morphology，morphology 是形貌的意思，跟微觀結構不是一個概念。而且“熱穩(wěn)定性和化學惰性”，不是結構，只能說是特性，可用 characteristic 或 feature 。所以第一句要改為： With unique characteristics/features such as high thermal stability and chemically inert, carbon nanotubes is considered a good carrier. |
2樓2011-05-26 15:12:17
8814402
至尊木蟲 (職業(yè)作家)
- 翻譯EPI: 509
- 應助: 18 (小學生)
- 貴賓: 0.381
- 金幣: 12916.1
- 散金: 47
- 紅花: 16
- 帖子: 4183
- 在線: 357.8小時
- 蟲號: 1184404
- 注冊: 2011-01-06
- 專業(yè): 藥物學其他科學問題
【答案】應助回帖
★ ★ ★ ★
sltmac(金幣+1): 謝謝交流~~ 2011-05-26 20:44:38
LBC8306(金幣+5): 非常感謝 2011-05-26 20:45:00
ringzhu(金幣+3, 翻譯EPI+1): 樓上家伙不厚道啊 有木有��！ 2011-05-27 20:17:58
sltmac(金幣+1): 謝謝交流~~ 2011-05-26 20:44:38
LBC8306(金幣+5): 非常感謝 2011-05-26 20:45:00
ringzhu(金幣+3, 翻譯EPI+1): 樓上家伙不厚道啊 有木有��！ 2011-05-27 20:17:58
|
Carbon nanotubes with unique constitutive properties such as high thermal stability and chemically inert nature, is commonly considered a good carrier. Composite materials for removing copper ion in water can be prepared from loading alumina onto carbon nanotubes. Here is a discussion on the adsorption properties of this composite absorbent . The composite absorbent, alumina-supported carbon nanotubes materials (Al2O3/CNTs), was prepared through putting aluminium nitrate into suspension of carbon nanotubes and adding some ammonia. IR and differential thermal analysis(DTA) showed that alumina has been loaded onto carbon nanotubes in the form of γ-Al2O3 and that thermal stability of carbon nanotubes is reduced after loading alumina. The largest adsorption capacity of Al2O3/CNTs can be achieved when 50% alumina is loaded. Adsorption capacity Al2O3/CNTs varied at different solution pH and decreased with the decrease of pH. As the initial concentration of copper ion in solutions increased, Al2O3/CNTs adsorption increased while adsorption rate reduced. Thermodynamics of copper ions being adsorbed onto Al2O3/CNTs showed that the adsorption was a spontaneous and exothermic process with an increase in entropy. The adsorption process can be described well by Langmuir adsorption model. From Langmuir adsorption isotherm, maximum adsorption capacity Qmax of Al2O3/CNTs to copper ions was determined as 44.445 mg/g. Research on adsorption kinetics elucidate that this adsorption could be described by pseudo-second-order kinetics model well. |
3樓2011-05-26 16:12:41
LBC8306
木蟲 (小有名氣)
自帶超級無限釋放無CD氧瓶超深
- 應助: 0 (幼兒園)
- 金幣: 3296.4
- 散金: 9
- 帖子: 57
- 在線: 157.3小時
- 蟲號: 746609
- 注冊: 2009-04-12
- 性別: GG
- 專業(yè): 聚合物共混與復合材料
4樓2011-05-28 18:15:30
相關版塊跳轉
我要訂閱樓主 LBC8306 的主題更新
| 4 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[碩博家園] 招收生物學/細胞生物學調劑 +4 | IceGuo 2026-03-26 | 5/250 |
|
|---|---|---|---|---|
|
|
[考研] 11408軟件工程求調劑 +3 | Qiu學ing 2026-03-28 | 3/150 |
|
|
[考研] 315求調劑 +4 | akie... 2026-03-28 | 5/250 |
|
|
|
[考研] 本科新能源科學與工程，一志愿華理能動285求調劑 +7 | AZMK 2026-03-28 | 11/550 |
|
|
|
[考研] 一志愿中南大學化學0703總分337求調劑 +5 | niko- 2026-03-27 | 5/250 |
|
|
|
[考研] 317求調劑 +6 | 十閑wx 2026-03-24 | 6/300 |
|
|
|
[材料工程] 一志愿C9材料與化工專業(yè)總分300求調劑 +8 | 曼111 2026-03-24 | 9/450 |
|
|
|
[考研] 0703化學/290求調劑/本科經(jīng)歷豐富/工科也可 +9 | 丹青奶蓋 2026-03-26 | 10/500 |
|
|
|
[考研] 求調劑推薦 材料 304 +15 | 荷包蛋hyj 2026-03-26 | 15/750 |
|
|
|
[考研] 材料求調劑 +5 | .m.. 2026-03-25 | 5/250 |
|
|
|
[考研] 0703化學338求調劑！ +6 | Zuhui0306 2026-03-26 | 7/350 |
|
|
|
[考研] 求調劑323材料與化工 +7 | 1124361 2026-03-24 | 7/350 |
|
|
|
[考研] 359求調劑 +4 | 王了個楠 2026-03-25 | 4/200 |
|
|
|
[考研] 333求調劑 +6 | wfh030413@ 2026-03-23 | 6/300 |
|
|
|
[考研] 材料與化工328分調劑 +6 | 。，。，。，。i 2026-03-23 | 6/300 |
|
|
|
[考研] 289材料與化工（085600）B區(qū)求調劑 +4 | 這么名字咋樣 2026-03-22 | 5/250 |
|
|
|
[考研] 一志愿北化315 求調劑 +3 | akrrain 2026-03-24 | 3/150 |
|
|
|
[考研] 求調劑一志愿武漢理工大學材料工程（085601） +5 | WW.' 2026-03-23 | 7/350 |
|
|
|
[考研] 求老師收我 +3 | zzh16938784 2026-03-23 | 3/150 |
|
|
|
[考研] 070300，一志愿北航320求調劑 +3 | Jerry0216 2026-03-22 | 5/250 |
|