二维磷酸锆纳米片调控氧化锌对有机染料的光催化降解
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摘要
本研究以水热法制备二维磷酸锆纳米片,对其微观结构及成分表征显示,制得的纳米片为正六边形片状结构,粒径大小为724±120nm,具有较高的表面电荷密度,Zeta电位值高达-55.39mV。二维磷酸锆纳米片能够有效调控纳米氧化锌分散液的紫外可见吸收光谱、能带间隙和Zeta电位。磷酸锆调控氧化锌的光催化研究结果表明:调节磷酸锆的添加量,可使氧化锌在保持稳定分散的同时,能有效地调控对亚甲基蓝的光催化降解。原因是:当磷酸锆的添加量较少时,能促进氧化锌的分散,从而增强其光催化效果;而当磷酸锆的添加量过多时,入射的紫外可见光被大尺寸磷酸锆纳米片屏蔽,从而抑制其光催化的能力。实验表明,当磷酸锆浓度为0.07mg/mL时,氧化锌的催化效果最好,超过该浓度后催化效果下降。
Two-dimensional zirconium phosphate nanoplates were prepared by hydrothermal method. The characterization of the nanoplates suggests that the nanoplatesare regular hexagonal lamellar structured with a size of 724±120 nm and high surface charge density. The Zeta potential value is up to-55.39 mV. The two-dimensional zirconium phosphate nanoplates could effectively control the UV-vis absorption spectra, energy gap and Zeta potentials of nanometer zinc oxide dispersions. The photocatalytic results show that the addition of zirconium phosphate can effectively adjust the photocatalytic degradation of methylene blue while maintaining stable dispersion. The reason for this phenomenon is that small addition of zirconium phosphate nanoplates can promote the photocatalytic effect of ZnO by improving the dispersion stability of ZnO colloids, and large addition of it shield the incident ultraviolet visible light and inhibit the photocatalytic effect of ZnO. Results shows the catalytic effect of zinc oxide reach the best level when the concentration of zirconium phosphate is 0.07 mgmL~(-1), the catalytic effect tends to decrease when the zirconium phosphate concentration exceeds 0.07 mgmL~(-1).
Two-dimensional zirconium phosphate nanoplates were prepared by hydrothermal method. The characterization of the nanoplates suggests that the nanoplatesare regular hexagonal lamellar structured with a size of 724±120 nm and high surface charge density. The Zeta potential value is up to-55.39 mV. The two-dimensional zirconium phosphate nanoplates could effectively control the UV-vis absorption spectra, energy gap and Zeta potentials of nanometer zinc oxide dispersions. The photocatalytic results show that the addition of zirconium phosphate can effectively adjust the photocatalytic degradation of methylene blue while maintaining stable dispersion. The reason for this phenomenon is that small addition of zirconium phosphate nanoplates can promote the photocatalytic effect of ZnO by improving the dispersion stability of ZnO colloids, and large addition of it shield the incident ultraviolet visible light and inhibit the photocatalytic effect of ZnO. Results shows the catalytic effect of zinc oxide reach the best level when the concentration of zirconium phosphate is 0.07 mgmL~(-1), the catalytic effect tends to decrease when the zirconium phosphate concentration exceeds 0.07 mgmL~(-1).
引文
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[20] 宁翔, 李生娟, 张熙. 纳米ZnO/Zn/CNT多孔复合结构的制备及其对亚甲基蓝的无光催化降解[J]. 材料科学与工程学报, 2016, 34(5): 721～725.
[21] A. Díaz, B. M. Mosby, V. I. Bakhmutov, et al. Clearfield Self-assembled Monolayers Based Upon a Zirconium Phosphate Platform[J]. Chemistry of Materials, 2013, 25(5): 723～728.
[2] 朱路平, 黄文娅, 马丽丽. ZnO-CNTs纳米复合材料的制备及性能表征[J]. 物理化学学报, 2006, 22(10): 1175～1180.
[3] 姜国华, 姜继森.金属氧化物纳米线和纳米棒的制备及应用[J]. 材料科学与工程学报, 2003, 21(5): 753～758.
[4] 井立强, 袁福龙, 侯海鸽. ZnO纳米粒子的表面氧空位与其光致发光和光催化性能的关系[J]. 中国科学:化学, 2004, 34(4): 310～314.
[5] 金伟, 田彦文. 氧化锌的制备及其光催化性能研究[J]. 材料与冶金学报, 2007, 6(1): 29～32.
[6] 苏碧桃, 胡常林, 等. 纳米氧化锌的制备及其在太阳光下的光催化性能[J]. 无机化学学报, 2010, 26(1): 96～100.
[7] 韩帅, 王海芳, 侯彬. 水热合成法制备光催化剂氧化锌及光催化降解效果研究[J]. 化工新型材料, 2015, 2015(1): 173～175.
[8] 滕洪辉, 徐淑坤, 王猛. 微乳液法合成不同维度氧化锌纳米材料及其光催化活性[J]. 无机材料学报, 2010, 20(10): 1034～1040.
[9] A. F. Mejia, Y. W. Chang, R. Ng, et al. Aspect Ratio and Polydispersity Dependence of Isotropic-Nematic Transition in Discotic Suspensions[J]. Physical Review E Statistical Physics Plasmas Fluids & Related Interdisciplinary Topics, 2012, 85(1): 482～510.
[10] S. Li, M. Zhang, Y. Gao, et al. ZnO-Zn/CNT Hybrid Film as Light-Free Nanocatalyst for Degradation Reaction[J]. Nano Energy, 2013, 2(6): 1329～1336.
[11] M. Shuai, A. F. Mejia, Y. W. Chang, Z. Cheng. Hydrothermal Synthesis of Layered α-Zirconium Phosphate Disks: Control of Aspect Ratio and Polydispersity for Nano-architecture[J]. Crystengcomm, 2013, 15(10): 1970～1977.
[12] Y. Gao, S. Li, B. Zhao, et al. A Synergistic Approach to Light-free Catalysis using Zinc Oxide Embedded Multi-Walled Carbon Nanotube Paper[J]. Carbon, 2014, 77: 705～709.
[13] H. Li, X. Wang, Y. Chen, Z. Cheng. Temperature-dependent Isotropic-to-Nematic Transition of Charged Nanoplates[J]. Physical Review E, 2014, 90(2): 020504～020504.
[14] X. Wang, D. Zhao, A. Diaz, et al. Thermo-sensitive Discotic Colloidal Liquid Crystals[J]. Soft Matter, 2014, 10(39): 7692～7695.
[15] M. Chen, H. Li, Y. Chen, et al. Observation of Isotropic-Isotropic Demixing in Colloidal Platelet-sphere Mixtures[J]. Soft Matter, 2015, 11(28): 5775～5779.
[16] X. Yuan, S. Mo, Y. Chen, et al. Effect of Nanoplatelet Size on the Colloidal Stability of Coupled Nanocomposite of TiO2 and Zirconium Phosphate Nanoplatelets[J]. Materials Science, 2018, 24(2): 1392～1320.
[17] Z. Liu, Y. Chen, S. Mo, et al. Stability of TiO2 Nanoparticles in Deionized Water with ZrP Nanoplatelets[J]. Journal of Nanoscience & Nanotechnology, 2015, 15(4): 3271～3275.
[18] 才红. 铁掺杂氧化锌制备及对有机染料的光催化降解[J]. 无机盐工业, 2014, 46(12): 71～74.
[19] 刘翠萍. 掺铁纳米氧化锌的制备及其光催化性能[J]. 材料科学与工程学报, 2010, 28(4): 605～608.
[20] 宁翔, 李生娟, 张熙. 纳米ZnO/Zn/CNT多孔复合结构的制备及其对亚甲基蓝的无光催化降解[J]. 材料科学与工程学报, 2016, 34(5): 721～725.
[21] A. Díaz, B. M. Mosby, V. I. Bakhmutov, et al. Clearfield Self-assembled Monolayers Based Upon a Zirconium Phosphate Platform[J]. Chemistry of Materials, 2013, 25(5): 723～728.