Abstract To develop an efficient photocatalyst electrode for solar energy harvesting and photocatalysis application in the visible region, broadband plasmonic Cu film combined with Cu2O/TiO2 nanotube arrays heterojunction (Cu film/Cu2O/TiNT) has been successfully fabricated by anodization combined with electrodeposition method. Interestingly, linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and UV–Vis diffuse reflectance spectroscopy reveal that the combined consequence of both Cu film and Cu2O in the as-synthesized ternary composite considerably enhances light absorption in the visible spectral. This activity is attributed to the more efficient charge separation/transportation and the presence of Cu film with strong plasmon resonance (SPR) effect. Moreover, the combined effects of both Cu film and Cu2O on TiNT approved highest catalytic current density and highest photocatalytic activity on methylene blue (MB). The efficiency and the rate of MB photodegradation over the Cu film/Cu2O/TiNT were found to be triple compared to TiNT. Within only 30 min of reaction time, the photodegradation of MB reaches nearly 100%.
Last. Vipul Bansal(RMIT: RMIT University)H-Index: 59
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Oxygen vacancies in inorganic semiconductors play an important role in reducing electron–hole recombination, which may have important implications in photocatalysis. Cuprous oxide (Cu2O), a visible light active p-type semiconductor, is a promising photocatalyst. However, the synthesis of photostable Cu2O enriched with oxygen defects remains a challenge. We report a simple method for the gram-scale synthesis of highly photostable Cu2O nanoparticles by the hydrolysis of a Cu(I)-triethylamine [Cu(I...
Last. Jie Li(CSU: Central South University)H-Index: 71
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Abstract Oxygen vacancy, as a kind of self-doping strategy, has been considered by numerous researchers. Several papers have been published about introducing oxygen vacancies in the semiconductors, which give a viewpoint that the concentration of oxygen vacancies may influence the performance. But few of them focus on how to control the concentration of oxygen vacancies, and how to achieve the goal without using additional equipment (such as sealed tube furnace) for too long time (20 min–4 h wit...
Abstract Bismuth (Bi) is a semimetal, which has proved particular behavior as a plasmonic photocatalyst/co-catalyst. In the present work, we for the first time successfully synthesized Bi/α- Bi 2 O 3 with a porous nanodendritic morphology on TiO 2 nanotubes (TiNT) using a one-step electrodeposition process to achieve both efficient surface plasmon resonance (SPR) effect enhancement and high specific surface area. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) characterizations we...
Last. Raffaele Marotta(University of Naples Federico II)H-Index: 36
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Abstract Deposition of copper on titanium dioxide holds great promise in producing materials with high activity in the photo-production of hydrogen by aqueous reforming of alcohols. This work aims at comparing hydrogen evolution through photoreforming of alcohols over photocatalysts prepared by in situ photodeposition of copper on three TiO2 commercial samples (P25, pure anatase, and pure rutile). The adoption of a single catalyst preparation method and experimental setup allowed to unequivocall...
Copper nanoparticles (NPs) with a tunable shape (cube, hemisphere and agglomerate), size (42–146 nm) and density were synthesized on the ITO substrate by electrochemical deposition. SEM, TEM, SAED, XRD, XAES and UV-vis spectrophotometry were employed to characterize these nanoparticles. The important parameters including the capping agent, Cu2+ concentration, applied potential and deposition time were chosen to determine the final morphology and composition of the nanoparticles. Sodium citrate, ...
Last. Leslie F. Petrik(UWC: University of the Western Cape)H-Index: 31
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Abstract Photocatalysis using titanium dioxide as photocatalyst is an efficient way for the removal of organic contaminants in water using solar energy. In this study, thin films of copper and silver were deposited on fused silica using the thermal evaporation technique. A 100 nm film of titanium dioxide (TiO2) was then deposited on the plasmonic metal films using a sputter coating technique. The opposite order of deposition of the film was also explored. The prepared thin films were fully chara...
Last. Zhaoqi Sun(Anda: Anhui University)H-Index: 28
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Abstract A unique Cu 2 O/TiO 2 nanocomposite with high photocatalytic activity was synthesized via a two-step chemical solution method and used for the photocatalytic degradation of organic dye. The structure, morphology, composition, optical and photocatalytic properties of the as-prepared samples were investigated in detail. The results suggested that the Cu 2 O/TiO 2 nanocomposite is composed of hierarchical TiO 2 hollow microstructure coated by a great many Cu 2 O nanoparticles. The photocat...
Last. Zhaoqi Sun(Anda: Anhui University)H-Index: 28
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Abstract A novel Cu 2 O/TNS composite structure of single crystal TiO 2 nanosheet (TNS) arrays decorated with flake-like Cu 2 O were synthesized by a facile hydrothermal reaction followed by the electrodeposition process. The effects of deposition potential on the microstructure, morphology, and optical property of the thin films were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV–vis spectrophotometer. When the depositi...
#1Qianqian Hu(CAS: Chinese Academy of Sciences)H-Index: 12
#2Jiquan Huang(CAS: Chinese Academy of Sciences)H-Index: 27
Last. Yongge Cao(RUC: Renmin University of China)H-Index: 16
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Abstract Cu incorporated TiO 2 has been regarded as a low-cost photocatalyst with excellent photocatalytic performance for water splitting. Here we try to exploit the origin of its high reactivity by fabricating a series of Cu incorporated TiO 2 films with the same Cu content under different atmosphere. Based on the comprehensive structure and surface characterizations, it is found that CuO is unstable and will be reduced to Cu 2 O or even to metallic Cu under light irradiation during the photoc...
p-Cu2O/n-TiO2 photoanodes were produced by electrodeposition of octahedral p-type Cu2O nanoparticles over n-type TiO2 nanotubes. The photoresponse of the composite p-n photoanodes was evaluated in photoelectrochemical cells operating at "zero-bias" conditions under either visible or UV-vis irradiation. In both operating conditions, the produced electrodes invariably followed the p-n-based photoanode operations but exhibited lower photoelectrochemical performance as compared to the bare n-TiO2 ph...
In this paper, a simple one-pot thermal synthesis method was used to successfully prepare Cu2+/biochar-doped TiO2 composite catalytic materials. The photocatalytic hydrogen production performance of the composites under different environmental conditions (dark, solar, and visible light irradiation) was analyzed in a biomass photocatalytic system using a corn straw suspension as a sacrificial agent. The Cu2+/biochar-doped TiO2 materials were characterized by SEM, TEM, XRD, FT-IR, XPS, and UV anal...
Last. Xiao-Niu Peng(Huda: Hubei University)H-Index: 19
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Abstract null null Doped semiconductor, a newly discovered plasmonic nanomaterial, has attracted tremendous interest due to its tunable properties. In the field of photocatalysis, the perfect combination of metal-like and semiconductor properties makes it the replacement and supplement of metal plasmonic nanomaterials. This new plasmonic photocatalysis offers high conversion efficiencies and wide optical absorption range with low fabrication costs. This article reviews the recent developments an...
#1Yue Xin(CSU: Central South University)H-Index: 3
#2Kaifu Yu(CSU: Central South University)H-Index: 3
Last. Jie Zeng(USTC: University of Science and Technology of China)H-Index: 69
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With the capability of inducing intense electromagnetic field, energetic charge carriers, and photothermal effect, plasmonic metals provide a unique opportunity for efficient light utilization and chemical transformation. Earth-abundant low-cost Cu possesses intense and tunable localized surface plasmon resonance from ultraviolet-visible to near infrared region. Moreover, Cu essentially exhibits remarkable catalytic performance toward various reactions owing to its intriguing physical and chemic...
Last. N. Jayamani(Government Arts College, Coimbatore)
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The Ag2O/TiO2 composite photocatalysts (PCs) were synthesised in a facile manner into applied photocatalytic decomposition of methylene blue (MB) dye under visible-light treatment. Then, physicoche...
Abstract Synthesis of copper-doped TiO2 (Cu:TiO2) and undoped TiO2 were performed by the sol–gel method. These photocatalysts were characterized by Raman spectroscopy, XRD, and diffuse reflectance. The synthesized catalysts were fixed on glass by the Doctor Blade technique, and on low-density polyethylene (LDPE) by the liquid phase suspension method. The films were characterized by SEM-EDX. The use of doped and undoped photocatalysts fixed in two types of substrates was evaluated in a pilot scal...
#1Reyhaneh Nekooie(SBUK: Shahid Bahonar University of Kerman)H-Index: 3
#2Tayebeh Shamspur(SBUK: Shahid Bahonar University of Kerman)H-Index: 16
Last. Ali Mostafavi(SBUK: Shahid Bahonar University of Kerman)H-Index: 26
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Abstract Visible light active photocatalyst, copper oxide/titanium dioxide/polyaniline (CuO/TiO2/PANI) nanocomposite, have been synthesized and utilized for chlorpyrifos degradation in water. The nanocomposite was characterized by some techniques including field emission scanning electron microscopy (FE-SEM), Fourier-transform infrared spectroscopy (FT-IR), and diffuse reflectance spectroscopy (DRS). The structural properties confirmed that the nanocomposite was successfully prepared and optical...
#2Yuan Yao(SUES: Shanghai University of Engineering Sciences)H-Index: 7
Last. Wen Ding(SUES: Shanghai University of Engineering Sciences)H-Index: 5
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Abstract Herein, a flame-assisted pyrolysis technique is developed for one-step in-situ construction of Cu2O/Cu/TiO2 nanotube arrays. The structure and morphology of the obtained samples are systematically characterized. Interestingly, UV–vis absorption spectroscopy reveals that the introduction of Cu2O and Cu considerably enhance light response of TiO2 nanotube arrays in the visible region. Moreover, the composited electrode shows enhanced photo-electrochemical activity. Compared with blank TiO...
