개선된 광촉매 효과를 위한 수열법에 의한 삼원계 Bi2WO6-GO-TiO2 나노복합체의 쉬운 합성 방법 New Synthesis of the Ternary Type Bi2WO6-GO-TiO2 Nanocomposites by the Hydrothermal Method for the Improvement of the Photo-catalytic Effect원문보기
독창적 물질인 $Bi_2WO_6-GO-TiO_2$ 나노복합체를 쉬운 수열법에 의해 성공적으로 합성하였다. 수열반응을 하는 동안, 그래핀 시트 위에 $Bi_2WO_6$와 $TiO_2$를 도포하였다. 합성한 $Bi_2WO_6-GO-TiO_2$ 복합체형 광촉매는 X-선 회절법(XRD), 주사전자현미경(SEM), 에너지 분산 X-선(EDX) 분석, 투과전자현미경(TEM), 라만분광법, UV-Vis 확산반사 분광법(UV-vis-DRS), 및 X-선 광전자분광기(XPS)에 의하여 특성화하였다. $Bi_2WO_6$나노입자는 불규칙한 dark-square block 나노 플페이트 형상을 보였으며, 이산화티탄 나노입자는 퀜텀 도트 사이즈로 그래핀 시트 위 표면을 덮고 있었다. 로다민 비의 분해는 농도감소의 측정과 함께 UV분광법에 의하여 관찰하였다. 합성된 물질의 광촉매 반응은 Langmuir-Hinshelwood 모델과 띠 이론으로 설명하였다.
독창적 물질인 $Bi_2WO_6-GO-TiO_2$ 나노복합체를 쉬운 수열법에 의해 성공적으로 합성하였다. 수열반응을 하는 동안, 그래핀 시트 위에 $Bi_2WO_6$와 $TiO_2$를 도포하였다. 합성한 $Bi_2WO_6-GO-TiO_2$ 복합체형 광촉매는 X-선 회절법(XRD), 주사전자현미경(SEM), 에너지 분산 X-선(EDX) 분석, 투과전자현미경(TEM), 라만분광법, UV-Vis 확산반사 분광법(UV-vis-DRS), 및 X-선 광전자분광기(XPS)에 의하여 특성화하였다. $Bi_2WO_6$ 나노입자는 불규칙한 dark-square block 나노 플페이트 형상을 보였으며, 이산화티탄 나노입자는 퀜텀 도트 사이즈로 그래핀 시트 위 표면을 덮고 있었다. 로다민 비의 분해는 농도감소의 측정과 함께 UV 분광법에 의하여 관찰하였다. 합성된 물질의 광촉매 반응은 Langmuir-Hinshelwood 모델과 띠 이론으로 설명하였다.
A novel material, $Bi_2WO_6-GO-TiO_2$ composite, was successfully synthesized using a facile hydrothermal method. During the hydrothermal reaction, the loading of $Bi_2WO_6$ and $TiO_2$ nanoparticles onto graphene sheets was achieved. The obtained $Bi_2WO_{6-GO-...
A novel material, $Bi_2WO_6-GO-TiO_2$ composite, was successfully synthesized using a facile hydrothermal method. During the hydrothermal reaction, the loading of $Bi_2WO_6$ and $TiO_2$ nanoparticles onto graphene sheets was achieved. The obtained $Bi_2WO_{6-GO-TiO2}$ composite photo-catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), Raman spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy (UV-vis-DRS), and X-ray photoelectron spectroscopy (XPS). The $Bi_2WO_6$ nanoparticle showed an irregular dark-square block nanoplate shape, while $TiO_2$ nanoparticles covered the surface of the graphene sheets with a quantum dot size. The degradation of rhodamine B (RhB), methylene blue trihydrate (MB), and reactive black B (RBB) dyes in an aqueous solution with different initial amount of catalysts was observed by UV spectrophotometry after measuring the decrease in the concentration. As a result, the $Bi_2WO_6-GO-TiO_2$ composite showed good decolorization activity with MB solution under visible light. The $Bi_2WO_6-GO-TiO_2$ composite is expected to become a new potential material for decolorization activity. Photocatalytic reactions with different photocatalysts were explained by the Langmuir-Hinshelwood model and a band theory.
A novel material, $Bi_2WO_6-GO-TiO_2$ composite, was successfully synthesized using a facile hydrothermal method. During the hydrothermal reaction, the loading of $Bi_2WO_6$ and $TiO_2$ nanoparticles onto graphene sheets was achieved. The obtained $Bi_2WO_{6-GO-TiO2}$ composite photo-catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), Raman spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy (UV-vis-DRS), and X-ray photoelectron spectroscopy (XPS). The $Bi_2WO_6$ nanoparticle showed an irregular dark-square block nanoplate shape, while $TiO_2$ nanoparticles covered the surface of the graphene sheets with a quantum dot size. The degradation of rhodamine B (RhB), methylene blue trihydrate (MB), and reactive black B (RBB) dyes in an aqueous solution with different initial amount of catalysts was observed by UV spectrophotometry after measuring the decrease in the concentration. As a result, the $Bi_2WO_6-GO-TiO_2$ composite showed good decolorization activity with MB solution under visible light. The $Bi_2WO_6-GO-TiO_2$ composite is expected to become a new potential material for decolorization activity. Photocatalytic reactions with different photocatalysts were explained by the Langmuir-Hinshelwood model and a band theory.
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
제안 방법
The XPS analysis was performed using a VG Scientific ESCALAB250 XPS system equipped with a monochromated Al K α X-ray source (hv = 1486.6 eV) with charge compensation.
The experiments were carried out at 100 mL of 5.0 × 10-5 mol/L dye concentration, 0.05 g nanocomposite, and neutral pH.
The objective of the study is to elucidate the easy preparation of a Bi2WO6-GO-TiO2 composite using a one-step hydrothermal method. In this process, Bi salt and Na2WO4 were dissolved in distilled water, and the obtained solution was stirred at a medium temperature after mixing with graphene oxide and a TiO2 precursor.
대상 데이터
Graphene oxide was prepared in the laboratory from natural graphite using the Hummer-Offeman’s method and used in the formation of composites. Titanium (IV) oxide (TiO2, nano power, 99.7%) used as a titanium source was purchased from Sigma-Aldrich Co. (USA). Ethanol (95%), and sodium hydroxide (NaOH, 93.
이론/모형
4. Conclusion
Considering the different aspects of the above results, we successfully synthesized Bi2WO6-GO-TiO2 nanocomposite by hydrothermal method. With the simultaneous existence of anatase and rutile phases, the TiO2 nanoparticles indicate the possible enhancement of the ability of the photocatalytic activity of the Bi2WO6-GO-TiO2 composite From SEM and TEM images, we suggested that both the Bi2WO6 and TiO2 nanostructures were successfully loaded onto the transparent graphene sheets.
Graphene oxide was prepared in the laboratory from natural graphite using the Hummer-Offeman’s method and used in the formation of composites.
Photocatalytic reactions with different photocatalysts were presented by the Langmuir-Hinshelwood model[25]. The photocatalytic degradation of RhB containing different photocatalysts obeys the pseudo-first-order kinetics with respect to the concentration of RhB.
5406 Å). Scanning electron microscopy (SEM) was conducted using a UV-vis spectrophotometer (Neosys-2000) with BaSO4 as a reference at room temperature which was converted from reflection to absorbance using the Kubelka-Munk method. Transmission electron microscopy (TEM) was also used to examine the size and distribution of the titanium and iron particles deposited on the fullerene surface of various samples.
The shape and structure of the nanomaterial surface with high resolution are analyzed using the SEM method. The results of SEM analysis of the Bi2WO6-GO-TiO2 composite in Figure 2 indicated that the graphene surface was covered with a mixture of Bi2WO6 and TiO2 nanoparticles.
성능/효과
The Raman, XPS, and DRS spectrum also play a key role to confirming the structures of the Bi2WO6-GO-TiO2 composite. The RhB degradation results showed that the Bi2WO6-GO-TiO2 composite is a considerably more effective photocatalyst than either the Bi2WO6-GO or the Bi2WO6-TiO2 composite. The study results also showed that the material is capable of photocatalytic degradation of RhB, MB, amd RBB in the visible light region.
The RhB degradation results showed that the Bi2WO6-GO-TiO2 composite is a considerably more effective photocatalyst than either the Bi2WO6-GO or the Bi2WO6-TiO2 composite. The study results also showed that the material is capable of photocatalytic degradation of RhB, MB, amd RBB in the visible light region. The MB degradation results showed that the Bi2WO6-GO-TiO2 composite is expected to become a new potential material for photodegradation activity with excellent photodegradation.
참고문헌 (33)
C. Hu, T. Lu, and F. Chen, A brief review of graphene-metal oxide composites synthesis and applications in photocatalysis, J. Chin. Adv. Mater. Soc., 1, 21-39 (2013).
L. Zhu, Z. D. Meng, M. L. Chen, F. J. Zhang, J. G. Choi, J. Y. Park, and W. C. Oh, Photodegradation of MB solution by the metal (Fe, Ni and Co) containing AC/ $TiO_2$ photocatalyst under the UV irradiation, J. Photo. Sci., 1, 69 (2010).
H. Zhang, X. Lv, Y. Li, Y. Wang, and J. Li, P25-graphene composite as a high performance photocatalyst, ACS Nano, 4, 380-386 (2010).
S. R. Kim, M. K. Parvez, and M. Chhowalla, UV-reduction of graphene oxide and its application as an interfacial layer to reduce the back-transport reactions in dye-sensitized solar cells, Chem. Phys. Lett., 483, 124-127 (2009).
W. Low and V. Boonamnuayvitaya, Enhancing the photocatalytic activity of $TiO_2$ co-doping of graphene- $Fe^{3+}$ ions for formaldehyde removal, J. Environ. Manage., 127, 142-149 (2013).
H.-I. Kim, G.-H. Moon, D. Monllor-Satoca, Y. Park, and W. Choi, Solar photoconversion using graphene/ $TiO_2$ composites: Nanographene shell on $TiO_2$ core versus $TiO_2$ nanoparticles on graphene sheet, J. Phys. Chem. C, 116(1), 1535-1543 (2012).
D. Zhao, G. Sheng, C. Chen, and X. Wang, Enhanced photocatalytic degradation of methylene blue under visible irradiation on $graphene@TiO_2$ dyade structure, Appl. Catal. B, 111-112, 303-308 (2012).
L. Karimi, M. E. Yazdanshenas, R. Khajavi, A. Rashidi, and M. Mirjalili, Using $graphene/TiO_2$ nanocomposite as a new route for preparation of electroconductive, self-cleaning, antibacterial and antifungal cotton fabric without toxicity, Cellulose, 21, 3813-3827 (2014).
C. Chung, Y.-K. Kim, D. Shin, S.-R. Ryoo, B.-H. Hong, and D.-H. Min, Biomedical applications of graphene and graphene oxide, Acc. Chem. Res., 46(10), 2211-2224 (2013).
Y. Kikuchia, K. Sunadaa, T. Iyodaa, K. Hashimoto, and A. Fujishimaa, Photocatalytic bactericidal effect of $TiO_2$ thin films: dynamic view of the active oxygen species responsible for the effect, J. Photochem. Photobiol. A, 106, 51-56 (1997).
Z. Zhang, W. Wang, M. Shang, and W. Yin, Low-temperature combustion synthesis of $Bi_2WO_6$ nanoparticles as a visible-lightdriven photocatalyst, J. Hazard. Mater., 177, 1013-1018 (2010).
J. Ren, W. Wang, L. Zhang, J. Chang, and S. P. Hu, Photocatalytic inactivation of bacteria by photocatalyst $Bi_2WO_6$ under visible light, Catal. Commun., 10, 1940-1943 (2009).
Z. Cui, D. Zeng, T. Tang, J. Liu, and C. Xie, Enhanced visible light photocatalytic activity of QDS modified $Bi_2WO_6$ nanostructures, Catal. Commun., 11, 1054-1057 (2010).
J. Ren, W. Wang, S. Sun, L. Zhang, and J. Chang, Enhanced photocatalytic activity of $Bi_2WO_6$ loaded with Ag nanoparticles under visible light irradiation, Appl. Catal. B, 92, 50-55 (2009).
Y. Zhang, Y. Zhang, L. Fei, X. Jiang, C. Pan, and Y. Wang, Engineering nanostructured $Bi_2WO_6$ - $TiO_2$ toward effective utilization of natural light in photocatalysis, J. Am. Chem. Soc., 94, 4157-4161 (2011).
Q. C. Xu, D. V. Wellia, Y. H. Ng, R. Amal, and T. T. Y. Tan, Synthesis of porous and visible-light absorbing $Bi_2WO_6$ / $TiO_2$ heterojunction films with improved photoelectrochemical and photocatalytic performances, J. Phys. Chem. C, 115(15), 7419-7428 (2011).
F. Zhou and Y. Zhu, Significant photocatalytic enhancement in methylene blue degradation of $Bi_2WO_6$ photocatalysts via graphene hybridization, J. Adv. Ceram., 1(1), 72-78 (2012).
H. Fu, L. Zhang, W. Yao, and Y. Zhu, Photocatalytic properties of nanosized $Bi_2WO_6$ catalysts synthesized via a hydrothermal process, Appl. Catal. B, 66, 100-110 (2006).
Y. Zhang, L. Fei, X. Jiang, C. Pan, and Y. Wang, Engineering nanostructured $Bi_2WO_6$ - $TiO_2$ toward effective utilization of natural light in photocatalysis, J. Am. Ceram. Soc., 94, 4157-4161 (2011).
Y.-L. Min, K. Zhang, Y.-C. Chen, and Y.-G. Zhang, Enhanced photocatalytic performance of $Bi_2WO_6$ by graphene supporter as charge transfer channel, Sep. Purif. Technol., 86, 98-105 (2012).
Z. Sun, J. Guo, S. Zhu, L. Mao, J. Ma, and D. Zhang, A high-performance $Bi_2WO_6$ -graphene photocatalyst for the visible light-induced $H_2$ and $O_2$ generation, Nanoscale, 6, 2186-2193 (2014).
C. G. Silva and J. L. Faria, Photocatalytic oxidation of benzen derivatives in aqueous suspensions: synergic effect induced by the introduction of carbon nanotubes in a $TiO_2$ matrix, Appl. Catal. B, 101, 81-89 (2010).
D. C. T. Nguyen, K. Y. Cho, and W. C. Oh, Synthesis of frost-like CuO combined graphene- $TiO_2$ by self-assembly method and its high photocatalytic performance, Appl. Surf. Sci., 412, 252-261 (2017).
J. Yang, X. Wang, X. Zhao, J. Dai, and S. Mo, Synthesis of uniform $Bi_2WO_6$ -reduced graphene oxide nanocomposites with significantly enhanced photocatalytic reduction activity, J. Phys. Chem., 119(6), 3068-3078 (2015).
Y. Li, X. Li, and J. Li, Photocatalytic degradation of methyl orange by $TiO_2$ -coated activated carbon and kinetic study, Water Res., 40, 1119-1126 (2006).
E. Gao, W. Wang, M. Shang, and J. Xu, Synthesis and enhanced photocatalytic performance of graphene- $Bi_2WO_6$ composite, Phys. Chem. Chem. Phys., 13, 2887-2893 (2011).
F. Dong, Z. Y. Wang, Y. J. Sun, W. K. Ho, and H. D. Zhang, Engineering the nanoarchitecture and texture of polymeric carbon nitride semiconductor for enhanced visible light photocatalytic activity, J. Colloid Interface Sci., 401, 70-79 (2013).
T. D. Nguyen-Phan, V. H. Pham, E. W. Shin, H. D. Pham, S. Kim, J. S. Chung, and S. H. Hur, The role of graphene oxide content on the adsorption-enhanced photocatalysis of titanium dioxide/ graphene oxide composites, Chem. Eng. J., 170, 226-232 (2011).
D. C. T. Nguyen, K. Y. Cho, and W. C. Oh, Synthesis of mesoporous $SiO_2$ / $Cu_2O$ -graphene nanocomposites and their highly efficien photocatalytic performance for dye pollutants. RSC Adv., 7, 29284-29294 (2017).
S. Min and G. Lu, Sites for High efficient photocatalytic hydrogen evolution on a limited-layered $MoS_2$ cocatalyst confined on graphene sheets-The role of graphene, J. Phys. Chem. C, 116(48), 25415-25424 (2012).
J. P. Zou, J. Ma, J. M. Luo, J. Yu, J. He, Y. Meng, and X. B. Luo, Fabrication of novel heterostructured few layered WS2- $Bi_2WO_6$ / $Bi_{3.84}W_{0.16}O_{6.24}$ composites with enhanced photocatalytic performance, Appl. Catal. B, 179, 220-228 (2015).
G. Colon, S. Murcia Lopez, M. C. Hidalgoa, and J. A. Nvioa, Sunlight highly photoactive $Bi_2WO_6$ - $TiO_2$ heterostructures for rhodamine B degradation, Chem. Commun., 46, 4809-4811 (2016).
D. C. T. Nguyen, K. Y. Cho, and W. C. Oh, A facile route to synthesize ternary $Cu_2O$ quantum dot/graphene- $TiO_2$ nanocomposites with an improved photocatalytic effect, Fullerenes, Nanotubes and Carbon Nanostructures DOI: 10.1080/1536383X.2017.1344648 (2017).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.