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[求助]
葡萄糖水熱制備疏水催化劑? 已有1人參與
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一篇文章報(bào)道的將Ni/TiO2催化劑變成疏水性的過程如下: Carbon-coated Ni/TiO2 catalysts were prepared via hydrothermal approach. Glucose and sodium chloride were dissolved in 10 mL of distilled water in the Teflon-lined stainless steel autoclave. Then, the reactor was charged with a certain amount of the unreduced catalyst Ni/TiO2. The reactor was then sealed and put into an oil bath and heated to 180C for 24 h under stirring. The products were filtered off and washed several times, first with water and then ethanol and finally dried in air for 5 h. 對(duì)催化劑制備不熟,想請(qǐng)教各位葡萄糖在180度下發(fā)生了什么反應(yīng),是脫水還是生產(chǎn)了碳?NaCl在這個(gè)過程中起什么作用? 如果生成的是碳的話,催化劑會(huì)疏水嗎? |
榮譽(yù)版主 (文壇精英)
山濤
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專家經(jīng)驗(yàn): +925 |
| 葡萄糖本身具有還原性,高溫下對(duì)未還原的Ni/TiO2有一定還原作用,使得葡萄糖對(duì)應(yīng)的產(chǎn)物負(fù)載到Ni/TiO2表面上。葡萄糖被氧化后,含氧量增多,其親水能力應(yīng)該會(huì)更強(qiáng)一些,比如羥基轉(zhuǎn)變?yōu)轸然F咸烟堑淖饔檬沁原,且可能帶有一定雜化功能。NaCl的作用不是太清楚,可能是起到活化性。(一己之言,僅供參考) |

榮譽(yù)版主 (文壇精英)
山濤
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專家經(jīng)驗(yàn): +925 |

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