规整形貌纳微米氧化镍的制备及光催化性能
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摘要
采用水热法和微乳液法分别制备了4种具有不同形貌(海胆状、花状、立方块状及棒状)的氧化镍纳微米材料。利用X射线衍射仪、扫描电子显微镜以及全自动比表面积仪对其晶相结构、表面形貌、比表面积及孔容孔径进行了测试,以亚甲基蓝模拟废水为降解对象,考察了所制纳微米材料的光催化活性。结果表明:不同形貌氧化镍纳微米材料对亚甲基蓝模拟废水的降解均有光催化活性,且为一级反应,其中比表面积最大的棒状纳米氧化镍表现出最好的光催化活性,在有光照同时曝气的条件下,催化剂用量为0.1 g时,光催化降解2 h后,5 mg/L的亚甲基蓝模拟废水的降解率可达90.2%。
Nano and micro nickel oxide materials with different morphologies( urchin-,flower-,cube-,and rod-like)were prepared by hydrothermal and microemulsion method,respectively. By means of X-ray diffraction,scanning electron microscope and automatic surface area instrument,the phase structure,morphology,specific surface area,pore volume and pore size of the materials were tested. The photocatalytic activities of the as-synthesized materials were investigated by photocatalytic degradation of methylene blue model wastewater. The results showed that all the nickel oxide nano and micro materials with different morphologies have photocatalytic activities for degradation of methylene blue model wastewater,and the photocatalytic oxidation is a first-order reaction. Among them,the rod-like nickel oxide catalyst with higher specific surface area shows better photocatalytic performances. Under the conditions of illumination,aeration,0. 1 g of catalyst,and photocatalytic degradation for 2 h,the degradation rate of methylene blue model wastewater( 5 mg / L) can reach 90. 2%.
Nano and micro nickel oxide materials with different morphologies( urchin-,flower-,cube-,and rod-like)were prepared by hydrothermal and microemulsion method,respectively. By means of X-ray diffraction,scanning electron microscope and automatic surface area instrument,the phase structure,morphology,specific surface area,pore volume and pore size of the materials were tested. The photocatalytic activities of the as-synthesized materials were investigated by photocatalytic degradation of methylene blue model wastewater. The results showed that all the nickel oxide nano and micro materials with different morphologies have photocatalytic activities for degradation of methylene blue model wastewater,and the photocatalytic oxidation is a first-order reaction. Among them,the rod-like nickel oxide catalyst with higher specific surface area shows better photocatalytic performances. Under the conditions of illumination,aeration,0. 1 g of catalyst,and photocatalytic degradation for 2 h,the degradation rate of methylene blue model wastewater( 5 mg / L) can reach 90. 2%.
引文
[1]任南琪,周显娇,郭婉茜,等.染料废水处理技术研究进展[J].化工学报,2013,64(1):84-94.
[2]Yan J Q,Wu G J,Guan N J,et al.Synergetic promotion of the photocatalytic activity of Ti O2by gold deposition under UV-visible light irradiation[J].Chemical Communications,2013,49(100):11767-11769.
[3]Seong S,Kim E,Kim Y,et al.Influence of deposition atmosphere on photocatalytic activity of Ti O2/Si Oxdouble-layers prepared by RF magnetron sputtering[J].Applied Surface Science,2009,256(1):1-5.
[4]Zhao W X,Bai Z P,Ren A L,et al.Sunlight photocatalytic activity of Cd S modified Ti O2loaded on activated carbon fibers[J].Applied Surface Science,2010,256(11):3493-3498.
[5]Lin J J,Shen J X,Wang T L,et al.Enhancement of photocatalytic properties of Ti O2nanobelts through surface-coarsening and surface nanoheterostructure construction[J].Materials Science and Engineering B,2011,176(12):921-925.
[6]Mohamed R M,Ismail A A,Othmanb I,et al.Preparation of Ti O2-ZSM-5 zeolite for photodegradation of EDTA[J].Journal of Molecular Catalysis A,2005,238(1-2):151-157.
[7]Park J,Kang E,Son S U,et al.Monodisperse nanoparticles of Ni and Ni O:synthesis,characterization,self-assembled superlattices,and catalytic applications in the suzuki coupling reaction[J].Advanced Materials,2005,17(4):429-434.
[8]Bai Z C,Ju Z C,Guo C L,et al.Direct large-scale synthesis of 3D hierarchical mesoporous Ni O microspheres as high-performance anode materials for lithium ion batteries[J].Nanoscale,2014,6(6):3268-3273.
[9]He J,Zhao Y F,Xiong D B,et al.Biotemplate assisted synthesis of3D hierarchical porous Ni O for supercapatior application with excellent rate performance[J].Materials Letters,2014,128:117-120.
[10]Dong Q,Yin S,Guo C S,et al.Single-crystalline porous Ni O nanosheets prepared fromβ-Ni(OH)2nanosheets:magnetic property and photocatalytic activity[J].Applied Catalysis B:Environmental,2014,147:741-747.
[11]Zhang L H,An L J,Liu B,et al.Synthesis and photocatalytic activity of porous polycrystalline Ni O nanowires[J].Applied Physics A,2011,104(1):69-75.
[12]Al-Hajry A,Umar A,Vaseem M,et al.Low-temperature growth and properties of flower-shapedα-Ni(OH)2and Ni O structures composed of thin nanosheets networks[J].Superlattices and Microstructures,2008,44(2):216-222.
[13]Yue W B,Hill A H,Harrison A,et al.Mesoporous single-crystal Co3O4templated by cage-containing mesoporous silica[J].Chemical Communications,2007,24:2518-2520.
[14]Tüysüz H,Comotti M,Schüth F.Ordered mesoporous Co3O4as highly active catalyst for low temperature CO-oxidation[J].Chemical Communications,2008,34:4022-4024.
[15]Zhao B,Ke X K,Bao J H,et al.Synthesis of flower-like Ni O and effects of morphology on its catalytic properties[J].Journal of Physical Chemistry C,2009,113(32):14440-14447.
[16]Harraz F A,Mohamed R M,Shawky A,et al.Composition and phase control of Ni/Ni O nanoparticles for photo catalytic degradation of EDTA[J].Journal of Alloys and Compounds,2010,508(1):133-140.
[2]Yan J Q,Wu G J,Guan N J,et al.Synergetic promotion of the photocatalytic activity of Ti O2by gold deposition under UV-visible light irradiation[J].Chemical Communications,2013,49(100):11767-11769.
[3]Seong S,Kim E,Kim Y,et al.Influence of deposition atmosphere on photocatalytic activity of Ti O2/Si Oxdouble-layers prepared by RF magnetron sputtering[J].Applied Surface Science,2009,256(1):1-5.
[4]Zhao W X,Bai Z P,Ren A L,et al.Sunlight photocatalytic activity of Cd S modified Ti O2loaded on activated carbon fibers[J].Applied Surface Science,2010,256(11):3493-3498.
[5]Lin J J,Shen J X,Wang T L,et al.Enhancement of photocatalytic properties of Ti O2nanobelts through surface-coarsening and surface nanoheterostructure construction[J].Materials Science and Engineering B,2011,176(12):921-925.
[6]Mohamed R M,Ismail A A,Othmanb I,et al.Preparation of Ti O2-ZSM-5 zeolite for photodegradation of EDTA[J].Journal of Molecular Catalysis A,2005,238(1-2):151-157.
[7]Park J,Kang E,Son S U,et al.Monodisperse nanoparticles of Ni and Ni O:synthesis,characterization,self-assembled superlattices,and catalytic applications in the suzuki coupling reaction[J].Advanced Materials,2005,17(4):429-434.
[8]Bai Z C,Ju Z C,Guo C L,et al.Direct large-scale synthesis of 3D hierarchical mesoporous Ni O microspheres as high-performance anode materials for lithium ion batteries[J].Nanoscale,2014,6(6):3268-3273.
[9]He J,Zhao Y F,Xiong D B,et al.Biotemplate assisted synthesis of3D hierarchical porous Ni O for supercapatior application with excellent rate performance[J].Materials Letters,2014,128:117-120.
[10]Dong Q,Yin S,Guo C S,et al.Single-crystalline porous Ni O nanosheets prepared fromβ-Ni(OH)2nanosheets:magnetic property and photocatalytic activity[J].Applied Catalysis B:Environmental,2014,147:741-747.
[11]Zhang L H,An L J,Liu B,et al.Synthesis and photocatalytic activity of porous polycrystalline Ni O nanowires[J].Applied Physics A,2011,104(1):69-75.
[12]Al-Hajry A,Umar A,Vaseem M,et al.Low-temperature growth and properties of flower-shapedα-Ni(OH)2and Ni O structures composed of thin nanosheets networks[J].Superlattices and Microstructures,2008,44(2):216-222.
[13]Yue W B,Hill A H,Harrison A,et al.Mesoporous single-crystal Co3O4templated by cage-containing mesoporous silica[J].Chemical Communications,2007,24:2518-2520.
[14]Tüysüz H,Comotti M,Schüth F.Ordered mesoporous Co3O4as highly active catalyst for low temperature CO-oxidation[J].Chemical Communications,2008,34:4022-4024.
[15]Zhao B,Ke X K,Bao J H,et al.Synthesis of flower-like Ni O and effects of morphology on its catalytic properties[J].Journal of Physical Chemistry C,2009,113(32):14440-14447.
[16]Harraz F A,Mohamed R M,Shawky A,et al.Composition and phase control of Ni/Ni O nanoparticles for photo catalytic degradation of EDTA[J].Journal of Alloys and Compounds,2010,508(1):133-140.