TY - JOUR

T1 - Evolution of the state of copper-based co-catalysts of the Cd0.3Zn0.7S photocatalyst at the photoproduction of hydrogen under action of visible light

AU - Markovskaya, Dina V.

AU - Kozlova, Ekaterina A.

AU - Stonkus, Olga A.

AU - Saraev, Andrey A.

AU - Cherepanova, Svetlana V.

AU - Parmon, Valentin N.

N1 - Publisher Copyright: © 2017 Hydrogen Energy Publications LLC

PY - 2017/12/21

Y1 - 2017/12/21

N2 - The promotion of the photocatalytic activity of the Cd0.3Zn0.7S nanoparticles via deposition of some copper species, such as CuxS and Cu0, as a co-catalyst, in the hydrogen production under visible light irradiation from aqueous solutions of a sacrificial Na2S/Na2SO3 system was studied. The state of the samples was characterized with a wide range of physical methods both in the initial state as well as after their photocatalytic operation. An evolution of both photocatalytic activity and the state of the photocatalyst particles was registered by a set of the physical methods. The highest apparent quantum efficiency and photocatalytic activity which were achieved at illumination by light with λ = 450 nm over the 0.1 wt% CuxS/Cd0.3Zn0.7S sample for the photocatalytic hydrogen evolution from Na2S/Na2SO3 aqueous solutions were 23.1% and 6.4 mmol g−1 h−1, respectively. It was shown that the deposited Cu species undergo the transformation to CuxS during the photocatalytic production of hydrogen, and these are the copper sulfide nanoparticles that increase the activity of the Cd1-xZnxS solid solutions. This statement agrees well with the principle of a constancy of the state of heterogeneous catalysts under their operation in the same reaction media established by G.K. Boreskov in the 1950s.

AB - The promotion of the photocatalytic activity of the Cd0.3Zn0.7S nanoparticles via deposition of some copper species, such as CuxS and Cu0, as a co-catalyst, in the hydrogen production under visible light irradiation from aqueous solutions of a sacrificial Na2S/Na2SO3 system was studied. The state of the samples was characterized with a wide range of physical methods both in the initial state as well as after their photocatalytic operation. An evolution of both photocatalytic activity and the state of the photocatalyst particles was registered by a set of the physical methods. The highest apparent quantum efficiency and photocatalytic activity which were achieved at illumination by light with λ = 450 nm over the 0.1 wt% CuxS/Cd0.3Zn0.7S sample for the photocatalytic hydrogen evolution from Na2S/Na2SO3 aqueous solutions were 23.1% and 6.4 mmol g−1 h−1, respectively. It was shown that the deposited Cu species undergo the transformation to CuxS during the photocatalytic production of hydrogen, and these are the copper sulfide nanoparticles that increase the activity of the Cd1-xZnxS solid solutions. This statement agrees well with the principle of a constancy of the state of heterogeneous catalysts under their operation in the same reaction media established by G.K. Boreskov in the 1950s.

KW - CdZnS

KW - NaS/NaSO

KW - Photocatalytic hydrogen production

KW - Visible light

KW - SYSTEM

KW - AQUEOUS-SOLUTIONS

KW - SULFIDE

KW - IRRADIATION

KW - CU

KW - SOLID-SOLUTION

KW - Cd1-xZnxS

KW - XPS

KW - Na2S/Na2SO3

KW - H-2 EVOLUTION

KW - EFFICIENT PHOTOCATALYST

KW - WATER

UR - http://www.scopus.com/inward/record.url?scp=85032888222&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2017.10.104

DO - 10.1016/j.ijhydene.2017.10.104

M3 - Article

AN - SCOPUS:85032888222

VL - 42

SP - 30067

EP - 30075

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 51

ER -