Comparative activity of aqueous dispersions of CdS nanocrystals stabilized by cationic and anionic polyelectrolytes in photocatalytic hydrogen production from water

Kabachii, Y.A.; Kochev, S.Y.; Alenichev, М.К.; Antonova, O.Y.; Sadagov, A.Y.; Valetskii, P.M.; Nadtochenko, V.A.

Авторы: Kabachii Yu A., Kochev S.Yu, Alenichev М.К., Antonova O.Yu, Sadagov A.Yu, Valetskii P.M., Nadtochenko V.A.
Журнал: Russian Chemical Bulletin
Том: 67
Номер: 10
Год издания: 2018
Издательство: Springer Nature
Местоположение издательства: Switzerland
Первая страница: 1803
Последняя страница: 1806
Оригинальные версии: Сравнительная активность водных дисперсий нанокристаллов CdS, стабилизированных катионными и анионными полиэлектролитами, в процессе фотокаталитического получения водорода из воды
DOI: 10.1007/s11172-018-2292-3
Аннотация: The results of a study on the photocatalytic activity of aqueous dispersions of Ni-doped CdS nanocrystals (NCs) covered with an amphiphilic polyelectrolyte (PE) shell, i.e., a polycation (NC-PC) or polyanion (NC-PA), are presented for the fi rst time. The H2 evolution rate measured under identical conditions served as a measure of activity. The NC-PC and NC-PA samples were characterized by similar PE content (~40%) and monomodal size distribution. According to our calculations based on the NC dimensions and lattice parameters, about one macromolecule of the PE is required to stabilize one NC. The average hydrodynamic diameter of the NC-PC was found to be 1.5 times larger than that of the NC-PA due to the diff erence between their chemical structures and diff erent abilities of ionogenic groups to dissociate. The photocatal ytic activity of the PE-stabilized CdS nanocrystals was signifi cantly infl uenced by the type of the PE, while the H2 evolution rate depended on the reducing medium used during the process. When the medium contained Na2S or when the PE-stabilized NCs were pretreated with Na2S, the eff ect of the shell type was more pronounced and the activity of NC-PA was 2 to 14 times higher than that of NC-PC.
Добавил в систему: Кочев Сергей Юрьевич

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Comparative activity of aqueous dispersions of CdS nanocrystals stabilized by cationic and anionic polyelectrolytes in photocatalytic hydrogen production from waterстатья

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