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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 7. Отображено 7.
07-05-2014 дата публикации

Glycol catalyst obtained through hydrogenation reaction of dimethyl oxalate and preparation method of glycol catalyst

Номер: CN103769095A
Автор: SAN XIAOGUANG, MENG DAN, WANG GUOSHENG, TAO KAI, NING ZHIGAO, MA ZHONGCHENG
Принадлежит:

The invention discloses a glycol catalyst obtained through hydrogenation reaction of dimethyl oxalate and a preparation method of the glycol catalyst, and relates to a catalyst and a preparation method thereof. The catalyst is prepared by using copper nitrate, copper acetate or copper chloride as a copper source, using alkoxy silane, high-purity silica powder, high-purity fumed silica and silicon sol as a silicon source, using ammonium hydroxide, urea and ammonium bicarbonate as a precipitator, and introducing transition metal chloride and nitrate in VIII, IB and IIB family in a periodic table of elements as a catalyst promoter, and a coprecipitation-impregnation method and a sol gel method are adopted to prepare the Cu-M-Si catalyst. The preparation method comprises the following steps: processing the silicon source to obtain mesoporous SiO2 by a solvent evaporation self-assembling method, complexing active components with the precipitator to obtain a copper-M-ammonia complexing solution ...

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Номер записи: 1
28-07-2023 дата публикации

Doped CuO-ZnO catalyst, doped CuO-ZnO ZIF-8 catalyst, and preparation method and application of doped CuO-ZnO ZIF-8 catalyst

Номер: CN116493014A
Автор: WANG WENZHU, ZHU YINING, WANG MING, FAN XIANCHAO, SONG ZHIHONG, GAO YUHAO, SUN WEICHEN, SAN XIAOGUANG, CUI JIA
Принадлежит:

The invention relates to the technical field of catalysts, and provides a doped CuO-ZnO catalyst, a doped CuO-ZnO-coated ZIF-8 catalyst, a preparation method and an application of the doped CuO-ZnO-coated ZIF-8 catalyst. The Co oxide is introduced into the CuO-ZnO catalyst through a hydrothermal method, the specific surface area of the catalyst can be effectively increased through metal oxide doping, the obtained metal oxide doped CuO-ZnO catalyst is high in oxygen vacancy concentration and high in catalytic activity, and the CO2 conversion rate and CH3OH selectivity can be effectively improved. ZIF-8 is further grown on the surface of the metal oxide doped CuO-ZnO catalyst through a hydrothermal method, the specific surface area and CO2 adsorption capacity of the catalyst are increased through formation of the ZIF-8, the exposure degree of active sites on the surface of the catalyst and the CO2 concentration are effectively improved, the catalytic utilization rate of CO2 is improved through ...

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Номер записи: 2
23-06-2023 дата публикации

Method for detecting formaldehyde gas by using Ti3C2Tx/SnO2 nano gas-sensitive composite material sensor

Номер: CN116297707A
Автор: SAN XIAOGUANG, ZHANG YUE, MENG DAN, ZHANG LEI, HU ZUOHUA
Принадлежит:

The invention discloses a method for detecting formaldehyde gas by using a Ti3C2Tx/SnO2 nano gas-sensitive composite material sensor, and relates to a method for detecting formaldehyde gas by using a composite material sensor. According to the preparation method, a simple hydrothermal method is adopted, so that the SnO2 nanospheres are anchored to the Ti3C2TxMXene material with the two-dimensional lamellar structure, and the Ti3C2TxMXene material with the two-dimensional lamellar structure has excellent application performance. The synthesized Ti3C2Tx/SnO2 nano composite material with the sheet structure has high sensitivity, good selectivity and long-term stability to formaldehyde gas at room temperature, so that a high-performance formaldehyde gas sensor is developed. In addition, the device is simple in process, small in size and suitable for mass production, and has a wide application prospect in the aspect of formaldehyde detection.

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Номер записи: 3
18-07-2023 дата публикации

Method for detecting trimethylamine gas by using SnO2-WO3 gas-sensitive material

Номер: CN116448819A
Автор: MENG DAN, RAN SHUNJIANG, LI RUIXIANG, SAN XIAOGUANG, KANG KEUN-WOONG, HE CHUN, ZHU LEI
Принадлежит:

The invention discloses a method for detecting trimethylamine gas by using a SnO2-WO3 gas-sensitive material, and relates to a method for detecting trimethylamine gas. According to the invention, a two-step hydrothermal method is adopted, and an optimal structure is constructed by changing the proportion of raw materials, so that the material has excellent application performance. The whole production process is simple in process, low in cost, good in controllability, non-toxic and harmless, and the prepared material is high in purity, good in crystallization, good in dispersity and suitable for large-scale industrial production. The SnO2-WO3 prepared by the invention shows relatively high sensitivity, good selectivity and rapid response-recovery characteristic to trimethylamine, so that the SnO2-WO3 has a wide application prospect in the food industry and healthy and safe product detection application.

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Номер записи: 4
07-07-2023 дата публикации

Method for detecting formaldehyde gas by SnO2/SnS2/rGO ultrathin nanosheet gas sensor

Номер: CN116399914A
Автор: MENG DAN, KANG JIAQI, ZOU XINMING, SAN XIAOGUANG, XIE ZONGSHENG, LUAN KUNXI, XING YUTING
Принадлежит:

The invention discloses a method for detecting formaldehyde gas through a SnO2/SnS2/rGO ultrathin nanosheet gas sensor, and relates to a method for detecting formaldehyde gas through a nanosheet gas sensor, in the design and preparation process of a gas sensitive material, a simple and efficient hydrothermal method is adopted, and the synthesis formula comprises SnO2 preparation, SnO2 vulcanization and rGO introduction. The whole production process is simple in technology and good in controllability, and the prepared material is high in purity, good in dispersity, superexcellent in performance and suitable for large-scale industrial production. The SnO2/SnS2/rGO material prepared by the invention shows relatively high sensitivity, good selectivity and stability to formaldehyde at 100 DEG C, has the greatest advantage that detection at 100 DEG C can be realized, and provides a simple, convenient and rapid technical means for on-site online monitoring of indoor air pollutants; therefore, ...

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Номер записи: 5
25-07-2023 дата публикации

Method for detecting trimethylamine by using SnO2-MoO3 nanosheet sensor

Номер: CN116482197A
Автор: MENG DAN, HE CHUN, LI RUIXIANG, SAN XIAOGUANG, XIE ZONGSHENG, KANG KEUN-WOONG, RAN SHUNJIANG
Принадлежит:

The invention discloses a method for detecting trimethylamine by using a SnO2-MoO3 nanosheet sensor, relates to a method for detecting trimethylamine, relates to a preparation method of a SnO2-MoO3 nanosheet, can be used for preparing a gas sensor for efficiently and accurately detecting trimethylamine, and belongs to the technical field of metal oxide semiconductor gas sensors. In the design and preparation process of the gas-sensitive material, a simple and efficient hydrothermal method is adopted, and an optimal structure is constructed by changing the proportion of raw materials, so that the gas-sensitive material has excellent application performance. The whole production process is simple in process, low in cost, good in controllability, non-toxic and harmless, and the prepared material is high in purity, good in crystallization, good in dispersity and suitable for large-scale industrial production. The SnO2-MoO3 nanosheet prepared by the invention shows relatively high sensitivity ...

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Номер записи: 6
25-07-2023 дата публикации

Method for detecting trimethylamine gas by using CuO-In2O3 gas-sensitive material sensor

Номер: CN116482196A
Автор: MENG DAN, KANG KEUN-WOONG, SAN XIAOGUANG, KANG JIAQI, HE CHUN, RAN SHUNJIANG
Принадлежит:

The invention discloses a method for detecting trimethylamine gas by using a CuO-In2O3 gas-sensitive material sensor, and relates to a method for detecting trimethylamine gas, the gas-sensitive material adopts a simple and efficient chemical synthesis means, and a CuO-In2O3 composite material with a hollow tubular structure is constructed by changing the proportion of raw materials, so that the CuO-In2O3 composite material has excellent application performance. The whole production process is simple in process, low in cost, good in controllability, non-toxic and harmless, and the prepared material is high in purity, good in crystallization, good in dispersity and suitable for large-scale industrial production. The CuO-In2O3 composite material prepared by the invention shows relatively high sensitivity, good selectivity and quick response and recovery characteristics to trimethylamine at 100 DEG C, so that the CuO-In2O3 composite material has a wide application prospect in the fields of ...

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Номер записи: 7