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Smart Bifunctional Sb2 Se3 Nanorods for Integrated Water Purification: Insoluble Liquid Separation and Photoelectrochemical Degradation.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-03-23 , DOI: 10.1002/cssc.202000438 Young Been Kim 1 , Sung Woon Cho 1, 2 , Nishad G Deshpande 1 , Sung Hyeon Jung 1 , Dong Su Kim 1 , Ki Ju Park 3 , Han-Ki Kim 1 , Hyung Koun Cho 1
ChemSusChem ( IF 7.5 ) Pub Date : 2020-03-23 , DOI: 10.1002/cssc.202000438 Young Been Kim 1 , Sung Woon Cho 1, 2 , Nishad G Deshpande 1 , Sung Hyeon Jung 1 , Dong Su Kim 1 , Ki Ju Park 3 , Han-Ki Kim 1 , Hyung Koun Cho 1
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Antimony selenide (Sb2Se3) nanostructures enable bifunctional water purification by a single membrane through i) physical separation of water‐insoluble oil and ii) photoelectrocatalytic degradation of water‐soluble organic compounds. Sb2Se3 nanorods with exposed surfaces of {h 0 0} and {h 0 l } planes exhibit superhydrophobicity (water contact angle of ≈159°) owing to extremely low surface energy of those dangling‐bond‐free van der Waals planes. Based on crystallographic understanding, superhydrophobic Sb2Se3 nanorods were produced on a mesh‐type substrate for utilization as a membrane for physical water/oil separation. Sb2Se3 exhibited an optimal photocathodic response with p‐type electrical conductivity under visible light along the longitudinal crystal direction. This indicated that the nanorods could be used as photoelectrocatalytic material for chemical water purification. A smart membrane with Sb2Se3 nanostructures was proposed as a candidate for integrated water purification that can simultaneously accomplish water/oil separation and photoelectrocatalytic degradation of organic compounds in wastewater. Linear sweep voltammetry measurements of the Sb2Se3‐membrane showed cathodic photocurrent generation (up to approximately 10 mA cm−2 at 0 V vs. reversible hydrogen electrode), which was enough to reduce O2 to an oxygen radical (O2.−) for degradation of methyl orange. Consequently, solar‐driven integrated water purification was demonstrated for the first time by using a single material with a dual function of superhydrophobicity and photoactivity.
中文翻译：
用于集成水净化的智能双功能Sb2 Se3纳米棒：不溶性液体分离和光电化学降解。
硒化锑（Sb 2 Se 3）纳米结构可通过以下步骤通过i）物理分离水不溶性油和ii）水溶性有机化合物的光电催化降解，通过单个膜进行双功能水净化。具有{ h 0 0}和{ h 0 l }平面的暴露表面的Sb 2 Se 3纳米棒表现出超疏水性（水接触角≈159°），这是由于那些无悬空的范德华平面的表面能极低。基于结晶学认识，超疏水性Sb 2 Se 3纳米棒是在网状基材上生产的，可用作物理水/油分离的膜。在可见光沿晶体的纵向方向上，Sb 2 Se 3表现出具有p型电导率的最佳光阴极响应。这表明该纳米棒可用作化学水净化的光电催化材料。提出了一种具有Sb 2 Se 3纳米结构的智能膜作为集成水净化的候选物，该膜可以同时完成水/油分离和废水中有机化合物的光电催化降解。Sb 2 Se 3的线性扫描伏安法测量膜显示出阴极光电流产生（0 V时相对于可逆氢电极，电流高达10 mA cm -2左右），足以将O 2还原为氧自由基（O 2 .-），从而降解甲基橙。因此，首次使用具有超疏水性和光活性双重功能的单一材料展示了太阳能驱动的集成水净化技术。
更新日期：2020-03-23
中文翻译：
用于集成水净化的智能双功能Sb2 Se3纳米棒：不溶性液体分离和光电化学降解。
硒化锑（Sb 2 Se 3）纳米结构可通过以下步骤通过i）物理分离水不溶性油和ii）水溶性有机化合物的光电催化降解，通过单个膜进行双功能水净化。具有{ h 0 0}和{ h 0 l }平面的暴露表面的Sb 2 Se 3纳米棒表现出超疏水性（水接触角≈159°），这是由于那些无悬空的范德华平面的表面能极低。基于结晶学认识，超疏水性Sb 2 Se 3纳米棒是在网状基材上生产的，可用作物理水/油分离的膜。在可见光沿晶体的纵向方向上，Sb 2 Se 3表现出具有p型电导率的最佳光阴极响应。这表明该纳米棒可用作化学水净化的光电催化材料。提出了一种具有Sb 2 Se 3纳米结构的智能膜作为集成水净化的候选物，该膜可以同时完成水/油分离和废水中有机化合物的光电催化降解。Sb 2 Se 3的线性扫描伏安法测量膜显示出阴极光电流产生（0 V时相对于可逆氢电极，电流高达10 mA cm -2左右），足以将O 2还原为氧自由基（O 2 .-），从而降解甲基橙。因此，首次使用具有超疏水性和光活性双重功能的单一材料展示了太阳能驱动的集成水净化技术。
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