Golden Yuanta Construction Engineering Co.

Hangzhou, China

Golden Yuanta Construction Engineering Co.

Hangzhou, China
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Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Cai W.,City University of Hong Kong | Wang A.W.,City University of Hong Kong | And 3 more authors.
Materials Technology | Year: 2015

In this paper, TiO2 -WO3 hybrid film was fabricated by a simple dip coating method. The synthesised hybrid thin film was characterised by SEM, XRD, UV-vis diffuse reflectance spectrophotometer, Raman spectroscopy, photocurrent measurement and N2 adsorption/desorption. The TiO2 -WO3 hybrid film exhibited a significant enhancement of photocatalytic activity towards degradation of 4-chlorophenol under visible light. The enhanced photocatalytic performance could ascribe to the formation of heterojunction, benefiting for effective utilisation of solar energy and suppressing the recombination of photogenerated electron-hole pairs. © 2015 W. S. Maney & Son Ltd.


Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Zheng Y.,CAS Institute of Botany | Ren Q.,CAS Institute of Botany | And 2 more authors.
Journal of Ovonic Research | Year: 2015

In this paper, we report the first time preparation of SnO2 nanoparticles (NPs) using a green chemistry method. The leaf extract of Plectranthus amboinicus was used as reducing and stabilization agent for synthesizing SnO2 NPs. The synthesized SnO2 NPs were characterized by SEM, EDX, XRD and UV-vis spectroscopy. Results showed that the biosynthesized SnO2 NPs owing a high purity. The photocatalytic property of the biosynthesized SnO2 NPs was investigated by photodegradation of rhodamine B (Rh B) under visible light illumination. Results indicated that the photocatalytic performance of the biosynthesized SnO2 NPs is much higher than that of commercial SnO2. Moreover, the biosynthesized SnO2 also exhibited an excellent reusability. © 2015 Journal of Ovonic Research All rights received.


Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Zheng Y.,CAS Institute of Botany | Wang A.,City University of Hong Kong | And 3 more authors.
Sensor Letters | Year: 2015

In this paper, we reported a nonenzymatic hydrogen peroxide amperometric sensor based on a glassy carbon electrode (GCE) modified with a SnO2-reduced graphene oxide nanocomposite (SnO2-RGO). The SnO2-RGO nanocomposite was synthesized via a simple one-pot hydrothermal chemical method and characterized by scanning electron microscopy and X-ray diffraction. Cyclic voltammetry and amperometric techniques were employed to investigate its electrocatalytic performance towards the H2O2 oxidation. The combined advantages of RGO and SnO2 provide the electrode with higher current response and lower oxidation potential compared with those of bare GCE and RGO modified GCE. The proposed electrode can be used for the determination of AA in the wide concentration range from 1 to 1000 μM with the detection limit of 0.11 μM. In addition, the proposed H2O2 electrochemical sensor also exhibits excellent reproducibility, stability and anti-interference property. We believe the SnO2-RGO nanocomposite can be considered as a suitable electrode modifier candidate for electrochemical analytic applications. Copyright © 2015 American Scientific Publishers


Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Zheng Y.,CAS Institute of Botany | Fu Z.,Golden Yuanta Construction Engineering Co. | And 2 more authors.
Bulletin of Materials Science | Year: 2015

This paper proposed a simple, efficient and sensitive electrochemical sensor for dissolved oxygen (DO) detection based on a galvanic displacement synthesized reduced graphene oxide-silver nanoparticles (RGO/Ag) composite modified grassy carbon electrode (GCE). The synthesized RGO/Ag nanocomposite was characterized by UV-vis spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results indicate the graphene oxide (GO) has been successfully reduced during the galvanic displacement process and the average size of Ag nanoparticle is 52 nm. The RGO/Ag nanocomposite-modified GCE showed a significant enhancement of DO detection compared with bare and RGO-modified GCEs. Moreover, the proposed DO sensor also exhibited an excellent repeatability, reproducibility and anti-interference ability. © Indian Academy of Sciences.


Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Zheng Y.,CAS Institute of Botany | Fu Z.,Golden Yuanta Construction Engineering Co. | And 2 more authors.
Functional Materials Letters | Year: 2015

Reduced graphene oxide (RGO) wrapped TiO2/Ag ternary nanocomposite was synthesized via a wet chemical method. The synthesized nanocomposite was characterized using UV-Vis spectroscopy, Raman spectroscopy, photoluminescence spectroscopy, Scanning electron microscope (SEM), Energy-dispersive X-ray spectroscopy (EDX) and X-ray Diffraction (XRD). The average size of RGO wrapped TiO2 and deposited Ag nanoparticles were 3.2 μm and 48 nm, respectively. Due to the highly facilitated electron transport by the synergistic effect between RGO sheets and Ag nanoparticles, the TiO2/RGO/Ag nanocomposite exhibited a significant enhancement of photocatalytic activity towards degradation of methylene blue under UV light. © 2015 World Scientific Publishing Company.


Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Wang A.,City University of Hong Kong | Zheng Y.,CAS Institute of Botany | And 2 more authors.
Materials Letters | Year: 2015

Ag dendrites/AgCl (AgD/AgCl) hybrid thin film was fabricated through a simple electrodeposition method for the first time. The obtained thin films were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and UV-vis spectroscopy techniques. The synthesized thin films were used to fabricate a photodetector, which possess a fast responses time with an excellent reproducibility. © 2014 Elsevier B.V. All rights reserved.


Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Fu Z.,Golden Yuanta Construction Engineering Co.
Ceramics International | Year: 2015

This article demonstrates the synthesis of ZnO nanoparticles (NPs) using leaf extract of Plectranthus amboinicus. The synthesized ZnO NPs were characterized by UV-vis spectroscopy, SEM, EDX, XRD, FTIR and photoluminescence spectroscopy. SEM study reveals that the biosynthesized ZnO NPs exhibits a rod shape structure with an average size of 88 nm. The UV-vis diffuse reflectance spectrum study indicates the band gap of biosynthesized ZnO NPs is 3.07 eV. Photocatalytic property of the ZnO NPs was investigated by photodegradation of methyl red (MR) under UV illumination. The photocatalytic performance of biosynthesized ZnO NPs was compared with hydrothermal synthesized ZnO NPs and P25. Results show that the biosynthesized ZnO NPs owing a superior photocatalytic activity towards degradation of MR. © 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.


Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Zheng Y.-H.,CAS Institute of Botany | Fu Z.-X.,Golden Yuanta Construction Engineering Co.
Chemical Papers | Year: 2015

An ascorbic acid (AA) amperometric sensor was fabricated based on a glassy carbon electrode (GCE) modified with a reduced graphene oxide-wrapped hierarchical TiO2 (RGO-TiO2) nanocomposite. The RGO-TiO2 nanocomposite was synthesized via the facial wet chemical method and characterized by scanning electron microscopy and X-ray diffraction. Cyclic voltammetry and amperometric techniques were employed to investigate its electrocatalytic performance towards the AA oxidation. The combined advantages of RGO and TiO2 provide the electrode with higher current response and lower oxidation potential compared with those of bare GCE and TiO2 modified GCE. The proposed electrode can be used for the determination of AA in the wide concentration range from 1 to 1500 μM with the detection limit of 0.5 μM. The proposed electrode was successfully used to determine AA in vitamin C tablets and spiked fruit juice. © 2014 Institute of Chemistry, Slovak Academy of Sciences.


Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Xia T.,Huazhong University of Science and Technology | Zheng Y.,CAS Institute of Botany | And 3 more authors.
Ceramics International | Year: 2015

In this work, WO3-reduced graphene oxide (RGO) nanocomposite was synthesized via a simple one-pot hydrothermal method. The synthesized nanocomposite was characterized by SEM, XRD, EDX, UV-vis spectroscopy, N2 adsorption/desorption, photocurrent response, electrochemical impedance spectroscopy and Raman spectroscopy. The superior contact between WO3 and RGO sheets in the nanocomposite facilitates the photocatalytic degradation of methylene blue and evolution of oxygen. The cause of the enhanced photocatalytic performance could ascribe to the highly facilitated electron transport by the synergistic effect between WO3 and RGO sheets, as well as suppressing the electron hole pair recombination in the nanocomposite. © 2015 Elsevier Ltd and Techna Group S.r.l.


Fu L.,CAS Institute of Botany | Fu L.,Golden Yuanta Construction Engineering Co. | Cai W.,City University of Hong Kong | Wang A.,City University of Hong Kong | Zheng Y.,CAS Institute of Botany
Materials Letters | Year: 2015

We have developed a new synthesis method to prepare WO3-Ag hybrid nanowires (WO3-Ag NWs) for photocatalytic hydrogenation of nitrobenzene (NB) to aniline. The catalyst was characterized by SEM, XRD, N2 adsorption/desorption and Raman spectroscopy. Results showed that the WO3-Ag hybrid nanowires displays a porous network structure with high specific surface area. The synergy of Ag NWs and WO3 NWs plays the most vital role in this enhanced photocatalytic performance. Moreover, the synthesized WO3-Ag NWs also exhibited excellent reusability. © 2014 Elsevier B.V. All rights reserved.

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