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Применить Всего найдено 2. Отображено 2.
04-04-2023 дата публикации

Preparation of N-maleoyl chitosan copper catalyst and application of N-maleoyl chitosan copper catalyst in boron addition reaction

Номер: CN115888815A
Автор: ZHANG YAOYAO, GUO HAIFENG, PENG WENJU, FU CHENGPENG, ZHU LEI, RAN KAIXIN, HUANG XINYANG
Принадлежит:

The invention relates to a preparation method and application of an N-maleoyl chitosan copper catalyst, and the preparation method specifically comprises the following steps: (1) carrying out amidation reaction on maleic anhydride and chitosan, and then reacting the obtained product with N-isopropylacrylamide to obtain temperature-sensitive hydrogel, and then loading a copper salt to prepare the N-maleoyl chitosan-NIPAAm-copper catalyst. (2) characterizing the prepared catalyst; (3) applying the prepared catalyst to a boron addition reaction of chalcone; and (4) carrying out a catalyst recycling test. The N-maleyl chitosan-NIPAAm-copper catalyst obtained by the invention is low in critical temperature, can realize solid-liquid conversion at 25-35 DEG C, has good repeatability and recoverability, has very high reaction activity in a boron addition reaction of chalcone, and is high in reaction product yield.

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Номер записи: 1
23-06-2023 дата публикации

Temperature-sensitive ZnS-coated PNxDy nanocage catalyst as well as preparation method and application of temperature-sensitive ZnS-coated PNxDy nanocage catalyst

Номер: CN116273176A
Автор: ZHANG YAOYAO, PENG WENJU, ZHU LEI, LI NAN, FU CHENGPENG, RAN KAIXIN, HUANG XINYANG
Принадлежит:

The invention relates to a preparation method of a temperature-sensitive ZnS-coated PNxDy nanocage catalyst, which comprises the following steps: (1) preparing shape-controllable temperature-sensitive materials, namely poly (N-isopropylacrylamide) and N, N-dimethylacrylamide (PNxDy); (2) preparing a ZIF-8 material by taking zinc nitrate and 2-methylimidazole as raw materials and methanol as a solvent; (3) adding a temperature-sensitive polymer PNxDy into the ZIF-8 material to form a temperature-sensitive layer, and then adding a coating agent to obtain a ZIF-8 film material ZIF-8 coated PNxDy; and (4) carrying out a hydrothermal reaction on the ZIF-8 (at) PNxDy and thioacetamide, so as to obtain the temperature-sensitive ZnS (at) PNxDy nanocage material. The catalyst presents a dodecahedron shape, is regular in morphology, can activate the reaction activity of potassium hydrogen persulfate (PMS), and can greatly improve the degradation rate of rhodamine.

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Номер записи: 2