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Encapsulated Cadmium Sulfide in Silicon Dioxide Porous Shells for Enhanced Photocatalytic Sustainability and Commendable Protection of Organic Carriers
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2019-03-05 , DOI: 10.1002/admi.201801933 Jian Zhao 1 , Shengnan Tian 1 , Haiting Shi 1 , Quan Quan 1 , Changfa Xiao 2
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2019-03-05 , DOI: 10.1002/admi.201801933 Jian Zhao 1 , Shengnan Tian 1 , Haiting Shi 1 , Quan Quan 1 , Changfa Xiao 2
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The purpose of this study is to provide a solution to two troublesome problems on photocorrosion of cadmium sulfide (CdS) and photocatalysis damage to organic carrier. An encapsulation system of CdS in silicon dioxide (SiO2) porous shell can be constructed by following strategies: polyporrole (PPy) layer is deposited on the surface of CdS nanoparticles via chemical redox polymerization; then the resulting PPy@CdS is covered by metasilicic acid (H2SiO3) with polyethylene glycol by sol–gel process, which originates from hydrolysis of tetraethyl orthosilicate; after removing PPy interlayers by calcination, CdS@void@SiO2 yolk–porous‐shell nanospheres (YSNs) are fabricated. As expected, YSN nanoarchitecture is verified by transmission electron microscopy (TEM) and Brunauer–Emmett–Teller (BET) analysis. The tailored void can be tuned by the sacrificed layers of PPy. CdS@void@SiO2 YSNs exhibit excellent photostability with a considerably low level of Cd2+ concentration at <30 ppm, which is dropped down 18 times less than ≈520 ppm of CdS. CdS@void@SiO2 YSNs show good dye removal efficiency up to 99.5%, and commendable hydrogen evolution of 126.8 µmol g−1 h−1. More interestingly, the transparent and porous SiO2 shell in the YSNs has an impressive shielding to organic carrier. Our versatile YSNs have great potential to translate CdS photocatalyst to industrial‐scale application because of its stability and nondestructivity.
中文翻译：
包裹在二氧化硅多孔壳中的硫化镉可增强光催化的可持续性和有机载体的可贵保护
这项研究的目的是为硫化镉（CdS）的光腐蚀和对有机载体的光催化损伤方面的两个棘手问题提供解决方案。可以通过以下策略构建CdS在二氧化硅（SiO 2）多孔壳中的包封系统：通过化学氧化还原聚合将多孔（PPy）层沉积在CdS纳米颗粒的表面上；然后通过溶胶-凝胶法将生成的PPy @ CdS覆盖在聚硅酸（H 2 SiO 3）和聚乙二醇上，这是由于原硅酸四乙酯的水解而产生的。煅烧去除PPy中间层后，CdS @ void @ SiO 2卵黄-多孔壳纳米球（YSNs）被制造出来。不出所料，YSN纳米结构已通过透射电子显微镜（TEM）和Brunauer-Emmett-Teller（BET）分析得到验证。可以通过牺牲PPy层来调整量身定制的空隙。CdS @ void @ SiO 2 YSNs具有出色的光稳定性，在<30 ppm时Cd 2+浓度非常低，比CdS的≈520ppm下降了18倍。CdS @ void @ SiO 2 YSNs表现出高达99.5％的良好染料去除效率，值得称赞的析氢量为126.8 µmol g -1 h -1。更有趣的是，透明且多孔的SiO 2YSN的外壳对有机载体具有令人印象深刻的屏蔽作用。我们的多功能YSN由于其稳定性和非破坏性，具有将CdS光催化剂转化为工业规模应用的巨大潜力。
更新日期：2019-03-05
中文翻译：
包裹在二氧化硅多孔壳中的硫化镉可增强光催化的可持续性和有机载体的可贵保护
这项研究的目的是为硫化镉（CdS）的光腐蚀和对有机载体的光催化损伤方面的两个棘手问题提供解决方案。可以通过以下策略构建CdS在二氧化硅（SiO 2）多孔壳中的包封系统：通过化学氧化还原聚合将多孔（PPy）层沉积在CdS纳米颗粒的表面上；然后通过溶胶-凝胶法将生成的PPy @ CdS覆盖在聚硅酸（H 2 SiO 3）和聚乙二醇上，这是由于原硅酸四乙酯的水解而产生的。煅烧去除PPy中间层后，CdS @ void @ SiO 2卵黄-多孔壳纳米球（YSNs）被制造出来。不出所料，YSN纳米结构已通过透射电子显微镜（TEM）和Brunauer-Emmett-Teller（BET）分析得到验证。可以通过牺牲PPy层来调整量身定制的空隙。CdS @ void @ SiO 2 YSNs具有出色的光稳定性，在<30 ppm时Cd 2+浓度非常低，比CdS的≈520ppm下降了18倍。CdS @ void @ SiO 2 YSNs表现出高达99.5％的良好染料去除效率，值得称赞的析氢量为126.8 µmol g -1 h -1。更有趣的是，透明且多孔的SiO 2YSN的外壳对有机载体具有令人印象深刻的屏蔽作用。我们的多功能YSN由于其稳定性和非破坏性，具有将CdS光催化剂转化为工业规模应用的巨大潜力。
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