Preparation of TiO2-Graphene Composite by a Two-Step Solvothermal Method and its Adsorption-Photocatalysis Property
TiO₂-graphene (TiO₂-GR) composites were successfully prepared by a two-step solvothermal method using titanium dioxide and natural graphite powder. X-ray diffraction (XRD) patterns showed that graphene oxide (GO) was prepared from natural flake graphite by a modified hydrothermal pressurized oxidati...
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| description | TiO₂-graphene (TiO₂-GR) composites were successfully prepared by a two-step solvothermal method using titanium dioxide and natural graphite powder. X-ray diffraction (XRD) patterns showed that graphene oxide (GO) was prepared from natural flake graphite by a modified hydrothermal pressurized oxidation method. The results of Fourier transform infrared spectroscopy (FTIR) proved that TiO₂-GR composites were synthesized during the process of hydrothermal reaction while GO was changed into graphene. X-ray photoelectron spectroscopy (XPS) demonstrated that TiO₂ particles contacted closely with graphene via Ti–O–C bonds. The results of Raman spectra confirmed the existence of graphene in the TiO₂-GR composite. Scanning electron microscopy (SEM) images showed that TiO₂ particles were oval and grafted on the graphene sheet which was smooth with ripples. UV-visible diffuse reflectance spectra demonstrated that there was a red shift in the absorption edge of TiO₂-GR composite. The experimental results indicated that the TiO₂-GR composite had significantly adsorption-photocatalytic activity for the degradation of methylene blue (MB) dyes. The adsorption capacity (q ₘₐₓ) of TiO₂-6%GR-4h for MB was 41.32 mg ⋅ g⁻ ¹ calculated based on the Langmuir adsorption model, which was about 3.3 times the adsorption capacity of TiO₂. Adsorption kinetics studies showed that the adsorption process fit well with the pseudo-second-order model. It proved that the TiO₂-GR composites were more efficient than the pure TiO₂ in the field of environmental protection. |
| doi_str_mv | 10.1007/s11270-016-2841-z |
| format | Article |
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X-ray diffraction (XRD) patterns showed that graphene oxide (GO) was prepared from natural flake graphite by a modified hydrothermal pressurized oxidation method. The results of Fourier transform infrared spectroscopy (FTIR) proved that TiO₂-GR composites were synthesized during the process of hydrothermal reaction while GO was changed into graphene. X-ray photoelectron spectroscopy (XPS) demonstrated that TiO₂ particles contacted closely with graphene via Ti–O–C bonds. The results of Raman spectra confirmed the existence of graphene in the TiO₂-GR composite. Scanning electron microscopy (SEM) images showed that TiO₂ particles were oval and grafted on the graphene sheet which was smooth with ripples. UV-visible diffuse reflectance spectra demonstrated that there was a red shift in the absorption edge of TiO₂-GR composite. The experimental results indicated that the TiO₂-GR composite had significantly adsorption-photocatalytic activity for the degradation of methylene blue (MB) dyes. The adsorption capacity (q ₘₐₓ) of TiO₂-6%GR-4h for MB was 41.32 mg ⋅ g⁻ ¹ calculated based on the Langmuir adsorption model, which was about 3.3 times the adsorption capacity of TiO₂. Adsorption kinetics studies showed that the adsorption process fit well with the pseudo-second-order model. It proved that the TiO₂-GR composites were more efficient than the pure TiO₂ in the field of environmental protection.</description><identifier>ISSN: 0049-6979</identifier><identifier>EISSN: 1573-2932</identifier><identifier>DOI: 10.1007/s11270-016-2841-z</identifier><language>eng</language><publisher>Cham: Springer International Publishing</publisher><subject>absorption ; Adsorption ; Atmospheric Protection/Air Quality Control/Air Pollution ; Carbon ; Climate Change/Climate Change Impacts ; Earth and Environmental Science ; Environment ; Environmental monitoring ; Environmental protection ; Fourier transform infrared spectroscopy ; Fourier transforms ; Graphene ; graphene oxide ; Graphite ; Hydrogeology ; Infrared spectroscopy ; methylene blue ; Oxidation ; Photocatalysis ; Raman spectroscopy ; reflectance ; scanning electron microscopy ; Soil Science & Conservation ; Stainless steel ; Titanium dioxide ; Water Quality/Water Pollution ; X-ray diffraction ; X-ray photoelectron spectroscopy</subject><ispartof>Water, air, and soil pollution, 2016-05, Vol.227 (5), p.1, Article 141</ispartof><rights>Springer International Publishing Switzerland 2016</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c340t-192851d7cb3c19dd8471193837bd0e8302c266febe32325643f7299a77f5984b3</citedby><cites>FETCH-LOGICAL-c340t-192851d7cb3c19dd8471193837bd0e8302c266febe32325643f7299a77f5984b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11270-016-2841-z$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11270-016-2841-z$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27922,27923,41486,42555,51317</link.rule.ids></links><search><creatorcontrib>Liu, Xiao-wen</creatorcontrib><creatorcontrib>Shen, Ling-yan</creatorcontrib><creatorcontrib>Hu, Yue-hua</creatorcontrib><title>Preparation of TiO2-Graphene Composite by a Two-Step Solvothermal Method and its Adsorption-Photocatalysis Property</title><title>Water, air, and soil pollution</title><addtitle>Water Air Soil Pollut</addtitle><description>TiO₂-graphene (TiO₂-GR) composites were successfully prepared by a two-step solvothermal method using titanium dioxide and natural graphite powder. X-ray diffraction (XRD) patterns showed that graphene oxide (GO) was prepared from natural flake graphite by a modified hydrothermal pressurized oxidation method. The results of Fourier transform infrared spectroscopy (FTIR) proved that TiO₂-GR composites were synthesized during the process of hydrothermal reaction while GO was changed into graphene. X-ray photoelectron spectroscopy (XPS) demonstrated that TiO₂ particles contacted closely with graphene via Ti–O–C bonds. The results of Raman spectra confirmed the existence of graphene in the TiO₂-GR composite. Scanning electron microscopy (SEM) images showed that TiO₂ particles were oval and grafted on the graphene sheet which was smooth with ripples. UV-visible diffuse reflectance spectra demonstrated that there was a red shift in the absorption edge of TiO₂-GR composite. The experimental results indicated that the TiO₂-GR composite had significantly adsorption-photocatalytic activity for the degradation of methylene blue (MB) dyes. The adsorption capacity (q ₘₐₓ) of TiO₂-6%GR-4h for MB was 41.32 mg ⋅ g⁻ ¹ calculated based on the Langmuir adsorption model, which was about 3.3 times the adsorption capacity of TiO₂. Adsorption kinetics studies showed that the adsorption process fit well with the pseudo-second-order model. It proved that the TiO₂-GR composites were more efficient than the pure TiO₂ in the field of environmental protection.</description><subject>absorption</subject><subject>Adsorption</subject><subject>Atmospheric Protection/Air Quality Control/Air Pollution</subject><subject>Carbon</subject><subject>Climate Change/Climate Change Impacts</subject><subject>Earth and Environmental Science</subject><subject>Environment</subject><subject>Environmental monitoring</subject><subject>Environmental protection</subject><subject>Fourier transform infrared spectroscopy</subject><subject>Fourier transforms</subject><subject>Graphene</subject><subject>graphene oxide</subject><subject>Graphite</subject><subject>Hydrogeology</subject><subject>Infrared spectroscopy</subject><subject>methylene blue</subject><subject>Oxidation</subject><subject>Photocatalysis</subject><subject>Raman spectroscopy</subject><subject>reflectance</subject><subject>scanning electron microscopy</subject><subject>Soil Science & Conservation</subject><subject>Stainless steel</subject><subject>Titanium dioxide</subject><subject>Water Quality/Water Pollution</subject><subject>X-ray diffraction</subject><subject>X-ray photoelectron 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of TiO2-Graphene Composite by a Two-Step Solvothermal Method and its Adsorption-Photocatalysis Property</title><author>Liu, Xiao-wen ; Shen, Ling-yan ; Hu, Yue-hua</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c340t-192851d7cb3c19dd8471193837bd0e8302c266febe32325643f7299a77f5984b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>absorption</topic><topic>Adsorption</topic><topic>Atmospheric Protection/Air Quality Control/Air Pollution</topic><topic>Carbon</topic><topic>Climate Change/Climate Change Impacts</topic><topic>Earth and Environmental Science</topic><topic>Environment</topic><topic>Environmental monitoring</topic><topic>Environmental protection</topic><topic>Fourier transform infrared spectroscopy</topic><topic>Fourier transforms</topic><topic>Graphene</topic><topic>graphene oxide</topic><topic>Graphite</topic><topic>Hydrogeology</topic><topic>Infrared 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pollution</jtitle><stitle>Water Air Soil Pollut</stitle><date>2016-05-01</date><risdate>2016</risdate><volume>227</volume><issue>5</issue><spage>1</spage><pages>1-</pages><artnum>141</artnum><issn>0049-6979</issn><eissn>1573-2932</eissn><abstract>TiO₂-graphene (TiO₂-GR) composites were successfully prepared by a two-step solvothermal method using titanium dioxide and natural graphite powder. X-ray diffraction (XRD) patterns showed that graphene oxide (GO) was prepared from natural flake graphite by a modified hydrothermal pressurized oxidation method. The results of Fourier transform infrared spectroscopy (FTIR) proved that TiO₂-GR composites were synthesized during the process of hydrothermal reaction while GO was changed into graphene. X-ray photoelectron spectroscopy (XPS) demonstrated that TiO₂ particles contacted closely with graphene via Ti–O–C bonds. The results of Raman spectra confirmed the existence of graphene in the TiO₂-GR composite. Scanning electron microscopy (SEM) images showed that TiO₂ particles were oval and grafted on the graphene sheet which was smooth with ripples. UV-visible diffuse reflectance spectra demonstrated that there was a red shift in the absorption edge of TiO₂-GR composite. The experimental results indicated that the TiO₂-GR composite had significantly adsorption-photocatalytic activity for the degradation of methylene blue (MB) dyes. The adsorption capacity (q ₘₐₓ) of TiO₂-6%GR-4h for MB was 41.32 mg ⋅ g⁻ ¹ calculated based on the Langmuir adsorption model, which was about 3.3 times the adsorption capacity of TiO₂. Adsorption kinetics studies showed that the adsorption process fit well with the pseudo-second-order model. It proved that the TiO₂-GR composites were more efficient than the pure TiO₂ in the field of environmental protection.</abstract><cop>Cham</cop><pub>Springer International Publishing</pub><doi>10.1007/s11270-016-2841-z</doi></addata></record> |
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| subjects | absorption Adsorption Atmospheric Protection/Air Quality Control/Air Pollution Carbon Climate Change/Climate Change Impacts Earth and Environmental Science Environment Environmental monitoring Environmental protection Fourier transform infrared spectroscopy Fourier transforms Graphene graphene oxide Graphite Hydrogeology Infrared spectroscopy methylene blue Oxidation Photocatalysis Raman spectroscopy reflectance scanning electron microscopy Soil Science & Conservation Stainless steel Titanium dioxide Water Quality/Water Pollution X-ray diffraction X-ray photoelectron spectroscopy |
| title | Preparation of TiO2-Graphene Composite by a Two-Step Solvothermal Method and its Adsorption-Photocatalysis Property |
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