Enhanced visible-light photocatalytic hydrogen evolution activity of Er3þ:Y3Al5O12/PdSeZnS by conduction band co-catalysts (MoO2, MoS2 and MoSe2)
Enhanced visible-light photocatalytic hydrogen evolution activity of Er3þ:Y3Al5O12/PdSeZnS by conduction band co-catalysts (MoO2, MoS2 and MoSe2)
复制标题
导带助催化剂（MoO2、MoS2 和 MoSe2）增强 Er3à:Y3Al5O12/PdSeZnS 的可见光光催化析氢活性
DOI：
10.1016/j.ijhydene.2016.06.065
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
王君
中科院分区：
文献类型：
--
作者：
王君
为了提高Er3 TaT：Y3Al5O12/PdS的可见光催化析氢活性，制备了几种导带型共催化剂MoO2、MoS2和MoSe2，其中PdS是价带助催化剂(VBCO)，用于促进光生空穴转移，Er3 TaT：Y3Al5O12是上转换发光材料。从可见光到紫外光的发光剂用于提供满足宽禁带锌S光催化剂能量要求的紫外光。用X射线衍射仪、扫描电子显微镜、透射电子显微镜和能谱分析对所制备的光催化剂的形貌、微观结构和组成进行了表征。测定了Er3：Y3Al5O12的紫外吸收光谱和荧光光谱，探讨了其发光效应。以Na2S和Na2SO3为牺牲剂，在可见光照射下评价了所制备的光催化剂的可见光催化析氢活性，详细考察了CaCOS(MoO2，MoS2和MoSe)的含量和可见光照射时间对Er3Te：Y3Al5O12/PdSeZnSeMoX2(X3O，S和Se)可见光催化析氢的影响。当MoSe2含量为0.30wt%时，Er3：Y3Al5O12/PdSeZnSeMoSe2显示出最高的光催化析氢活性。
Several conduction band co-catalysts (CBCOs), MoO2, MoS2 and MoSe2, were prepared to.improve the visible-light photocatalytic hydrogen evolution activity of Er3þ:Y3Al5O12/PdS.eZnS from water splitting, in which the PdS is a valence band co-catalyst (VBCO) used to.facilitate the photo-generated hole transfer and the Er3þ:Y3Al5O12 is an up-conversion.luminescence agent from visible light to ultraviolet light used to provide the ultraviolet.light satisfying the energy demands of wide band-gap ZnS photocatalyst. XRD, SEM, TEM.and EDX analyses were employed to confirm the morphology, microstructure and.composition of the prepared photocatalysts. UVevis absorption and PL spectra were also.determined to explore luminescence effect of the Er3þ:Y3Al5O12. The visible-light photocatalytic.hydrogen evolution activity of the prepared photocatalysts was evaluated by.using Na2S and Na2SO3 as sacrificial reagents in aqueous solution under visible light irradiation..The influential factors such as contents of CBCOs (MoO2, MoS2 and MoSe2) and.visible-light irradiation time on visible-light photocatalytic hydrogen evolution of.Er3þ:Y3Al5O12/PdSeZnSeMoX2 (X ¼ O, S and Se) were investigated in detail. Particularly,.Er3þ:Y3Al5O12/PdSeZnSeMoSe2 with 0.30 wt% MoSe2 shows the highest photocatalytic.hydrogen evolution activity.