A facile approach of fabricating graphene-encapsulated ZnO microspheres and their synergic effect on photocatalytic performance
Source abstract
Abstract
A facile approach of fabricating homogeneous graphene (GE)-encapsulated ZnO microspheres (ZnO microspheres@GE) by bubbling, sonicating, freeze drying, and reduction is developed. The transmission electron microscopy results reveal an intimate interface between GE and ZnO. The as-synthesized ZnO microspheres@GE composites exhibit much higher adsorption capability and excellent photocatalytic activity for methylene blue compared with bare ZnO microspheres, which should be attributed to improved carrier transport efficiency and large surface area arising from the graphene encapsulating. Besides of that, due to the characters of non-functionalized and easy reproducibility, it should be extended to synthesis of GE-encapsulated other semiconductors as well.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: ZnO doping and properties · Advanced Photocatalysis Techniques · Carbon and Quantum Dots Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
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1. Allen MJ, Tung VC, Kaner RB (2010) Honeycomb carbon: a review of graphene. Chem Rev 110:132–14510.1021/cr900070d ↗
2. Bolotin KI, Sikes KJ, Jiang Z, Klima M, Fudenberg G, Hone J, Kim P, Stormer HL (2008) Ultrahigh electron mobility in suspended graphene. J Solid State Commun 146:351–35510.1016/j.ssc.2008.02.024 ↗
3. Geim AK, Novoselov KS (2007) The rise of graphene. Nat Mater 6:183–19110.1038/nmat1849 ↗
4. Kim HN, Kim TW, Kim IY, Hwang SJ (2011) Cocatalyst-free photocatalysts for efficient visible-light-induced H2 production: porous assemblies of CdS quantum dots and layered titanate nanosheets. Adv Funct Mater 21:3111–311810.1002/adfm.201100453 ↗
5. Kudin KN, Ozbas B, Schniepp HC, Prud’homme RK, Aksay IA, Car R (2008) Raman spectra of graphite oxide and functionalized graphene sheets. Nano Lett 8:36–4110.1021/nl071822y ↗
6. Lee C, Wei X, Kysar JW, Hone J (2008) Measurement of the elastic properties and intrinsic strength of monolayer graphene. Science 321:385–38810.1126/science.1157996 ↗
7. Leng WH, Zhang Z, Zhang JQ, Cao CN (2005) Investigation of the kinetics of a TiO2 photoelectrocatalytic reaction involving charge transfer and recombination through surface states by electrochemical impedance spectroscopy. J Phys Chem B 109:15008–1502310.1021/jp051821z ↗
8. Li B, Cao H, Yin G, Lu Y, Yin J (2011) Cu2O@reduced graphene oxide composite for removal of contaminants from water and supercapacitors. J Mater Chem 21:10645–1064810.1039/c1jm12135a ↗
9. Lin G, Zheng J, Xu R (2008) Template-free synthesis of uniform CdS hollow nanospheres and their photocatalytic activities. J Phys Chem C 112:7363–737010.1021/jp8006969 ↗
10. Liu H, Cheng S, Wu M, Wu H, Zhang J, Li W, Cao C (2000) Photoelectrocatalytic degradation of sulfosalicylic acid and its electrochemical impedance spectroscopy investigation. J Phys Chem A 104:7016–702010.1021/jp000171q ↗
11. Liu J, Bai H, Wang Y, Liu Z, Zhang X, Sun DD (2010) Self-assembling TiO2 nanorods on large graphene oxide sheets at a two-phase interface and their anti-recombination in photocatalytic applications. Adv Funct Mater 20:4175–418110.1002/adfm.201001391 ↗
12. Nair RR, Blake P, Grigorenko AN, Novoselov KS, Booth TJ, Stauber T (2008) Fine structure constant defines visual transparency of graphene. Science 320:130810.1126/science.1156965 ↗
13. Novoselov KS, Geim AK, Morozov SV, Jiang D, Zhang Y, Dubonos SV (2004) Electric field effect in atomically thin carbon films. Science 306:666–66910.1126/science.1102896 ↗
14. Novoselov KS, Geim AK, Morozov SV, Jiang D, Katsnelson MI, Grigorieva IV (2005) Two-dimensional gas of massless Dirac fermions in graphene. Nature 438:197–20010.1038/nature04233 ↗
15. Peng W, Li X (2013) Synthesis of a sulfur–graphene composite as an enhance metal-free photocatalyst. Nano Res 6:286–29210.1007/s12274-013-0306-x ↗
16. Qiu Y, Chen W, Yang S, Zhang B, Zhang XX, Zhong YC, Wong KS (2010) Hierarchical hollow spheres of ZnO and Zn1−x Co x O: directed assembly and room-temperature ferromagnetism. Cryst Growth Des 10:177–18310.1021/cg900832m ↗
17. Shao D, Yu M, Sun H, Hu T, Lian J, Sawyer S (2013) High responsivity, fast ultraviolet photodetector fabricated from ZnO nanoparticle–graphene core–shell structures. Nanoscale 5:3664–366710.1039/c3nr00369h ↗
18. Stankovich S, Dikin DA, Piner RD, Kohlhaas KA, Kleinhammes A, Jia Y (2007) Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide. Carbon 45:1558–156510.1016/j.carbon.2007.02.034 ↗
19. Stoller MD, Park S, Zhu Y, An J, Ruoff RS (2008) Graphene-based ultracapacitors. Nano Lett 8:3498–350210.1021/nl802558y ↗
20. Sun L, Zhao Z, Zhou Y, Liu L (2012) Anatase TiO2 nanocrystals with exposed 001 facets on graphene sheets via molecular grafting for enhanced photocatalytic activity. Nanoscale 4:613–62010.1039/C1NR11411E ↗
21. Tu W, Zhou Y, Zou Z (2013) Versatile graphene-promoting photocatalytic performance of semiconductors: basic principles, synthesis, solar energy conversion, and environmental applications. Adv Funct Mater. doi: 10.1002/adfm.20120354710.1002/adfm.201203547 ↗
22. Wang LL, Lou Z, Fei T, Zhang T (2011) Zinc oxide core–shell hollow microspheres with multi-shelled architecture for gas sensor applications. J Mater Chem 21:19331–1933610.1039/c1jm13354c ↗
23. Xing MY, Zhang JL, Feng Chen (2009) New approaches to prepare nitrogen-doped TiO2 photocatalysts and study on their photocatalytic activities in visible light. Appl Catal B 89:563–56910.1016/j.apcatb.2009.01.016 ↗
24. Xing MY, Qi DY, Zhang JL, Chen F, Tian BZ, Bagwas S, Anpo M (2012) Super-hydrophobic fluorination mesoporous MCF/TiO2 composite as a high-performance photocatalyst. J Catal 294:37–4610.1016/j.jcat.2012.07.004 ↗
25. Xing MY, Fang WZ, Nasir M, Ma YF, Zhang JL, Anpo M (2013a) Self-doped Ti3+-enhanced TiO2 nanoparticles with a high-performance photocatalysis. J Catal 297:236–24310.1016/j.jcat.2012.10.014 ↗
26. Xing MY, Yang BX, Yu H, Tian BZ, Bagwasi S, Zhang JL, Gong XQ (2013b) Enhanced photocatalysis by Au nanoparticle loading on TiO2 single-crystal (001) and (110) facets. J Phys Chem Lett 4:3910–391710.1021/jz4021102 ↗
27. Xu Y, Bai H, Lu G, Li C, Shi G (2008) Flexible graphene films via the filtration of water-soluble noncovalent functionalized graphene sheets. J Am Chem Soc 130:5856–585710.1021/ja800745y ↗
28. Xu T, Zhang L, Cheng H, Zhu Y (2011) Significantly enhanced photocatalytic performance of ZnO via graphene hybridization and the mechanism study. Appl Catal B 101:382–38710.1016/j.apcatb.2010.10.007 ↗
29. Yan J, Fan Z, Wei T, Qian W, Zhang M, Wei F (2010) Fast and reversible surface redox reaction of graphene–MnO2 composites as supercapacitor electrodes. Carbon 48:3825–383310.1016/j.carbon.2010.06.047 ↗
30. Yang S, Feng X, Ivanovici S, Müllen K (2010) Fabrication graphene-encapsulated oxide nanoparticles: towards high-performance anode materials for lithium storage. Angew Chem Int Ed 49:8408–841110.1002/anie.201003485 ↗
31. Zhang Y, Tan YW, Stormer HL, Kim P (2005) Experimental observation of the quantum Hall effect and Berry’s phase in graphene. Nature 438:201–20410.1038/nature04235 ↗
32. Zhang LW, Fu HB, Zhu YF (2008) Efficient TiO2 photocatalysts from surface hybridization of TiO2 particles with graphite-like carbon. Adv Funct Mater 18:2180–218910.1002/adfm.200701478 ↗
33. Zhang D, Yang X, Zhu J, Zhang Y, Zhang P, Li G (2011a) Graphite-like carbon deposited anatase TiO2 single crystals as efficient visible-light photocatalysts. J Sol–Gel Sci Technol 58:594–60110.1007/s10971-011-2433-8 ↗
34. Zhang J, Jiang J, Zhao XS (2011b) Synthesis and capacitive properties of manganese oxide nanosheets dispersed on functionalized graphene sheets. J Phys Chem C 115:6448–645410.1021/jp200724h ↗
35. Zhang N, Zhang Y, Pan X, Yang MQ, Xu YJ (2012) Constructing ternary CdS–graphene–TiO2 hybrids on the flatland of graphene oxide with enhanced visible-light photoactivity for selective transformation. J Phys Chem C 116:18023–1803110.1021/jp303503c ↗
36. Zhao L, Chen X, Wang X, Zhang Y, Wei W, Sun Y (2010) One-step solvothermal synthesis of a carbon@TiO2 dyade structure effectively promoting visible-light photocatalysis. Adv Mater 22:3317–332110.1002/adma.201000660 ↗