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1. ±êÌâ: Synthesis and Structural Characterization of Graphene-Based Membranes ×÷Õß: Yang, YH; Sun, HJ; Peng, TJ, et al. À´Ô´³ö°æÎï: ACTA PHYSICO-CHIMICA SINICA ¾í: 27 ÆÚ: 3 Ò³: 736-742 ³ö°æÄê: 2011 ±»ÒýƵ´Î: 0 2. ±êÌâ: Synthesis and Structural Characterization of Graphene by Oxidation Reduction ×÷Õß: Yang, YH; Sun, HJ; Peng, TJ À´Ô´³ö°æÎï: CHINESE JOURNAL OF INORGANIC CHEMISTRY ¾í: 26 ÆÚ: 11 Ò³: 2083-2090 ³ö°æÄê: 2010 |
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2008297(½ð±Ò+10): 2011-04-22 12:29:20
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×÷Õß: Yang, YH (Yang Yong-Hui); Sun, HJ (Sun Hong-Juan); Peng, TJ (Peng Tong-Jiang) ±êÌâ: Synthesis and Structural Characterization of Graphene by Oxidation Reduction À´Ô´³ö°æÎï: CHINESE JOURNAL OF INORGANIC CHEMISTRY, 26 (11): 2083-2090 NOV 10 2010 ÓïÑÔ: Chinese ÎÄÏ×ÀàÐÍ: Article ×÷Õ߹ؼü´Ê: graphene; graphite oxide; Hummers method; oxidation reduction KeyWords Plus: EXFOLIATED GRAPHITE OXIDE; AQUEOUS DISPERSIONS; CARBON; NANOPLATELETS; NANOSHEETS ÕªÒª: The graphite oxide (GO) was prepared from purified natural flake graphite by the modified Hummers method. The colloidal form of graphene was subsequently prepared by ultrasonicating GO in the presence of hydrazine hydrate. The samples were characterized by using FTIR, Raman, Scanning Probe Microscopy (SPM) and zeta potential technique. The results suggest that the graphite is oxidized to covalent bond-type graphite intercalation compounds with various oxygen bearing functional groups (C=O, C-O, C-OH, -COOH and C-O-C). FTIR spectra show that the surface functional groups of graphite and graphene are almost the same. Graphene oxide and graphene can readily form stable aqueous colloids in water or in alkali solution with uniform sheet thickness of 1 nm. The factors affecting reduction degree and stability of graphene were discussed in reduction process, such as hydrazine hydrate dosage, reaction time and pH value in system. Reduction degree of graphene is mainly controlled by hydrazine hydrate dosage, reaction time in system while the stability is mainly affected by the pH value. µØÖ·: [Sun Hong-Juan; Peng Tong-Jiang] SW Univ Sci & Technol, Inst Mineral Mat & Applicat, Mianyang 621010, Sichuan, Peoples R China; [Yang Yong-Hui] SW Univ Sci & Technol, Coll Sci, Mianyang 621010, Sichuan, Peoples R China ͨѶ×÷ÕßµØÖ·: Sun, HJ, SW Univ Sci & Technol, Inst Mineral Mat & Applicat, Mianyang 621010, Sichuan, Peoples R China. µç×ÓÓÊÏ䵨ַ: sunhongjuan@swust.edu.cn ÒýÓõIJο¼ÎÄÏ×Êý: 17 ±»ÒýƵ´Î: 1 ³ö°æÉÌ: CHINESE CHEMICAL SOC ³ö°æÉ̵ØÖ·: C/O DEPT INT AFFAIRS, SECRETARY OF CHEM SOC, PO BOX 2709, BEIJING 100080, PEOPLES R CHINA ISSN: 1001-4861 29 ×Ö·ûµÄÀ´Ô´³ö°æÎïÃû³ÆËõд: CHIN J INORG CHEM ISO À´Ô´ÎÄÏ׳ö°æÎïÃû³ÆËõд: Chin. J. Inorg. Chem. À´Ô´ÎÄÏ×Ò³Âë¼ÆÊý: 8 ѧ¿ÆÀà±ð: Chemistry, Inorganic & Nuclear ISI ÎÄÏ×´«µÝºÅ: 686WF |
2Â¥2011-04-22 12:25:53
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2008297(½ð±Ò+10): 2011-04-22 12:30:08
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×÷Õß: Yang, YH (Yang Yong-Hui); Sun, HJ (Sun Hong-Juan); Peng, TJ (Peng Tong-Jiang); Huang, QA (Huang Qiao) ±êÌâ: Synthesis and Structural Characterization of Graphene-Based Membranes À´Ô´³ö°æÎï: ACTA PHYSICO-CHIMICA SINICA, 27 (3): 736-742 MAR 2011 ÓïÑÔ: Chinese ÎÄÏ×ÀàÐÍ: Article ×÷Õ߹ؼü´Ê: Graphite; Graphite oxide; Graphene; Oxidation reduction; Crystal structure KeyWords Plus: EXFOLIATED GRAPHITE OXIDE; AQUEOUS DISPERSIONS; REDUCTION; NANOSHEETS; SHEETS; CARBON ÕªÒª: A stable hydrosol of graphene was synthesized by oxidation reduction and then a flow assembly of this graphene was used to form a graphene-based membrane by vacuum extraction filtering method. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, particle size analysis, and scanning probe microscopy (SPM) were used to characterize the crystal structure, granularity, and characteristic change of the molecular spectrum of the samples in the reaction. FTIR tests show that the structural layer of graphite during the oxidation process bonds to a large number of functional groups and parts of these stable functional groups remain on the reduced structural layer of graphene. X-ray diffraction results show that the peaks of the graphite oxide shift to lower angles, become broader and the original graphite peak disappears. Suspensions of graphene oxide form condensed matter and graphene flocculating constituent during film deposition. Particle size analysis and SPM tests show that the particle sizes of the graphene oxide sheets that are dispersed in water show a tailing peak and a broad distribution while the graphene sheets show a singlet, narrower distribution, and smaller dimensions. Raman results show that during oxidation and reduction, the D peak and G peak of the samples gradually extend, I-D/I-G increases gradually and the degree of sample disorder increases. On the basis of the above analyses, the structural characteristics of the samples in the reaction are summarized. µØÖ·: [Sun Hong-Juan; Peng Tong-Jiang] SW Univ Sci & Technol, Inst Mineral Mat & Applicat, Mianyang 621010, Sichuan Prov, Peoples R China; [Yang Yong-Hui; Huang Qiao] SW Univ Sci & Technol, Coll Sci, Mianyang 621010, Sichuan Prov, Peoples R China ͨѶ×÷ÕßµØÖ·: Sun, HJ, SW Univ Sci & Technol, Inst Mineral Mat & Applicat, Mianyang 621010, Sichuan Prov, Peoples R China. µç×ÓÓÊÏ䵨ַ: sunhongjuan@swust.edu.cn »ù½ð×ÊÖúÖÂл: »ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ Southwest University of Science and Technology, China 10ycjj21 The project was supported by the Postgraduate Innovation Fund of Southwest University of Science and Technology, China (10ycjj21). ÒýÓõIJο¼ÎÄÏ×Êý: 31 ±»ÒýƵ´Î: 0 ³ö°æÉÌ: PEKING UNIV PRESS ³ö°æÉ̵ØÖ·: PEKING UNIV, CHEMISTRY BUILDING, BEIJING 100871, PEOPLES R CHINA ISSN: 1000-6818 29 ×Ö·ûµÄÀ´Ô´³ö°æÎïÃû³ÆËõд: ACTA PHYS-CHIM SIN ISO À´Ô´ÎÄÏ׳ö°æÎïÃû³ÆËõд: Acta Phys.-Chim. Sin. À´Ô´ÎÄÏ×Ò³Âë¼ÆÊý: 7 ѧ¿ÆÀà±ð: Chemistry, Physical ISI ÎÄÏ×´«µÝºÅ: 730BT |
3Â¥2011-04-22 12:27:30
2008297
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4Â¥2011-04-22 12:30:37
2008297
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5Â¥2011-04-22 12:31:52
minlfish
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6Â¥2011-04-22 12:50:26
minlfish
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7Â¥2011-04-22 12:51:58
minlfish
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FN ISI Export Format VR 1.0 PT J AU Yang, YH Sun, HJ Peng, TJ AF Yang Yong-Hui Sun Hong-Juan Peng Tong-Jiang TI Synthesis and Structural Characterization of Graphene by Oxidation Reduction SO CHINESE JOURNAL OF INORGANIC CHEMISTRY LA Chinese DT Article DE graphene; graphite oxide; Hummers method; oxidation reduction ID EXFOLIATED GRAPHITE OXIDE; AQUEOUS DISPERSIONS; CARBON; NANOPLATELETS; NANOSHEETS AB The graphite oxide (GO) was prepared from purified natural flake graphite by the modified Hummers method. The colloidal form of graphene was subsequently prepared by ultrasonicating GO in the presence of hydrazine hydrate. The samples were characterized by using FTIR, Raman, Scanning Probe Microscopy (SPM) and zeta potential technique. The results suggest that the graphite is oxidized to covalent bond-type graphite intercalation compounds with various oxygen bearing functional groups (C=O, C-O, C-OH, -COOH and C-O-C). FTIR spectra show that the surface functional groups of graphite and graphene are almost the same. Graphene oxide and graphene can readily form stable aqueous colloids in water or in alkali solution with uniform sheet thickness of 1 nm. The factors affecting reduction degree and stability of graphene were discussed in reduction process, such as hydrazine hydrate dosage, reaction time and pH value in system. Reduction degree of graphene is mainly controlled by hydrazine hydrate dosage, reaction time in system while the stability is mainly affected by the pH value. C1 [Sun Hong-Juan; Peng Tong-Jiang] SW Univ Sci & Technol, Inst Mineral Mat & Applicat, Mianyang 621010, Sichuan, Peoples R China. [Yang Yong-Hui] SW Univ Sci & Technol, Coll Sci, Mianyang 621010, Sichuan, Peoples R China. RP Sun, HJ, SW Univ Sci & Technol, Inst Mineral Mat & Applicat, Mianyang 621010, Sichuan, Peoples R China. EM sunhongjuan@swust.edu.cn NR 17 TC 1 PU CHINESE CHEMICAL SOC PI BEIJING PA C/O DEPT INT AFFAIRS, SECRETARY OF CHEM SOC, PO BOX 2709, BEIJING 100080, PEOPLES R CHINA SN 1001-4861 J9 CHIN J INORG CHEM JI Chin. J. Inorg. Chem. PD NOV 10 PY 2010 VL 26 IS 11 BP 2083 EP 2090 PG 8 SC Chemistry, Inorganic & Nuclear GA 686WF UT ISI:000284727000027 ER EF |

8Â¥2011-04-22 12:52:55
minlfish
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- ×¢²á: 2007-11-20
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|
FN ISI Export Format VR 1.0 PT J AU Yang, YH Sun, HJ Peng, TJ Huang, QA AF Yang Yong-Hui Sun Hong-Juan Peng Tong-Jiang Huang Qiao TI Synthesis and Structural Characterization of Graphene-Based Membranes SO ACTA PHYSICO-CHIMICA SINICA LA Chinese DT Article DE Graphite; Graphite oxide; Graphene; Oxidation reduction; Crystal structure ID EXFOLIATED GRAPHITE OXIDE; AQUEOUS DISPERSIONS; REDUCTION; NANOSHEETS; SHEETS; CARBON AB A stable hydrosol of graphene was synthesized by oxidation reduction and then a flow assembly of this graphene was used to form a graphene-based membrane by vacuum extraction filtering method. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, particle size analysis, and scanning probe microscopy (SPM) were used to characterize the crystal structure, granularity, and characteristic change of the molecular spectrum of the samples in the reaction. FTIR tests show that the structural layer of graphite during the oxidation process bonds to a large number of functional groups and parts of these stable functional groups remain on the reduced structural layer of graphene. X-ray diffraction results show that the peaks of the graphite oxide shift to lower angles, become broader and the original graphite peak disappears. Suspensions of graphene oxide form condensed matter and graphene flocculating constituent during film deposition. Particle size analysis and SPM tests show that the particle sizes of the graphene oxide sheets that are dispersed in water show a tailing peak and a broad distribution while the graphene sheets show a singlet, narrower distribution, and smaller dimensions. Raman results show that during oxidation and reduction, the D peak and G peak of the samples gradually extend, I-D/I-G increases gradually and the degree of sample disorder increases. On the basis of the above analyses, the structural characteristics of the samples in the reaction are summarized. C1 [Sun Hong-Juan; Peng Tong-Jiang] SW Univ Sci & Technol, Inst Mineral Mat & Applicat, Mianyang 621010, Sichuan Prov, Peoples R China. [Yang Yong-Hui; Huang Qiao] SW Univ Sci & Technol, Coll Sci, Mianyang 621010, Sichuan Prov, Peoples R China. RP Sun, HJ, SW Univ Sci & Technol, Inst Mineral Mat & Applicat, Mianyang 621010, Sichuan Prov, Peoples R China. EM sunhongjuan@swust.edu.cn FU Southwest University of Science and Technology, China [10ycjj21] FX The project was supported by the Postgraduate Innovation Fund of Southwest University of Science and Technology, China (10ycjj21). NR 31 TC 0 PU PEKING UNIV PRESS PI BEIJING PA PEKING UNIV, CHEMISTRY BUILDING, BEIJING 100871, PEOPLES R CHINA SN 1000-6818 J9 ACTA PHYS-CHIM SIN JI Acta Phys.-Chim. Sin. PD MAR PY 2011 VL 27 IS 3 BP 736 EP 742 PG 7 SC Chemistry, Physical GA 730BT UT ISI:000288005200034 ER EF |

9Â¥2011-04-22 12:54:38














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