a) Photocatalytic H2 production rate for ZCS catalysts with different geometry: 1.0 mg of photocatalyst, 0.7 M Na2S, and 1.05 M Na2SO3; b) Brunauer-Emmett-Teller adsorptiondesorption isotherms of the NRs and the NPLs, pore size distribution by BJH in the insert; c) H2 production rate of the NPLs at different concentrations of hole scavengers. d) Cycling tests of photocatalytic activity of the NPLs under different wavelengths. Error bars in (b) and (c) represent standard deviation of measured rates within 3 hours.

Contexts in source publication

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... however, was not the case. H2 production from aqueous Na2S/Na2SO3 solution under visible light illumination (λ ≥ 420 nm) was substantially higher for the NPLs (Figure 3a and Figure S9, Supporting Information). Large difference in PA can be also observed by the naked eye: the NPLs produced a large amount of gas bubbles during the illumination, while H2 evolution in case of the NRs was sluggish (Movie S1, Supporting Information). ...

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... difference in PA can be also observed by the naked eye: the NPLs produced a large amount of gas bubbles during the illumination, while H2 evolution in case of the NRs was sluggish (Movie S1, Supporting Information). respectively, as measured from Brunauer-Emmett-Teller (BET) adsorption-desorption isotherms (Figure 3b). The average pore size is 10 nm for NRs while they range from 20 to 70 nm for the NPLs. ...

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... S1, Supporting Information). What is also remarkable is that the NPLs maintain a high H2 production rate of 554 μmol•h −1 •mg −1 even when the concentrations of Na2S and Na2SO3 are as low as 0.05 M (Figure 3c), which is in stark contrast with other II-VI photocatalysts. [34] Furthermore, the dispersion of NPLs retained 67% of its catalytic activity after 102 hours of illumination highlighting high resistance of NPLs to photocorrosion (Figure 3d). ...

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... is also remarkable is that the NPLs maintain a high H2 production rate of 554 μmol•h −1 •mg −1 even when the concentrations of Na2S and Na2SO3 are as low as 0.05 M (Figure 3c), which is in stark contrast with other II-VI photocatalysts. [34] Furthermore, the dispersion of NPLs retained 67% of its catalytic activity after 102 hours of illumination highlighting high resistance of NPLs to photocorrosion (Figure 3d). It should be noted here that 67% is a conservative estimate considering that a small part of catalyst will inevitably be lost via the splashed bubble during each process of vacuum pumping. ...

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... measurements of photocurrents generated by films of the NRs and the NPLs deposited on fluorine doped tin oxide (FTO) glass were carried out to characterize how many photoelectrons can successfully reach the particle surface and to better understand the To understand better the reasons behind more efficient charge separation at the NPL/FTO than the NR/FTO interfaces, we proposed a mechanism in Figure 5. The NPLs and the NRs are oriented with their long axes parallel to the surface ( Figure 5 c and d), which is reasonable as we can see from the SEM images that most of NPLs are oriented with their long axes parallel to the silicon wafer surface (Figure S3, Supporting Information), and as is common for nanocolloids with geometrical asymmetries. [40][41][42] Note, however, that seemingly similar orientation has markedly different consequences for the two types of nanostructures. ...