Introducing a protective interlayer of TiO2 in Cu2O–CuO heterojunction thin film as a highly stable visible light photocathode

RSC Advances ◽  
2015 ◽  
Vol 5 (7) ◽  
pp. 5231-5236 ◽  
Author(s):  
Peng Wang ◽  
Xiaoming Wen ◽  
Rose Amal ◽  
Yun Hau Ng
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Charge Transfer ◽  
Visible Light ◽  
Redox Reactions ◽  
Electrolyte Interface

Photoactivity and stability of Cu2O–CuO heterojunction thin films are enhanced by incorporating an interlayer of TiO2. The thin TiO2 layer minimises the redox reactions at Cu2O–electrolyte interface and facilitates charge transfer from Cu2O to CuO.

scholarly journals A tunable volatile organic compound sensor by using PtOx/GQDs/TiO2 nanocomposite thin films at room temperature under visible-light activation

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 39859-39868 ◽  
Author(s):  
Shaofeng Shao ◽  
Yunyun Chen ◽  
Shenbei Huang ◽  
Fan Jiang ◽  
Yunfei Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Visible Light ◽  
Gas Sensors ◽  
Room Temperature ◽  
Light Activation ◽  
Nanocomposite Thin Film ◽  
Nanocomposite Thin Films ◽  
Volatile Organic ◽  
Visible Light Activation

Pt/GQDs/TiO2 nanocomposite thin film-based gas sensors show tunable VOC sensing behaviour at room temperature under visible-light activation.

Photocatalytic properties of p-n heterojunction Ag2CO3/Ag3PO4/Ni thin films under visible light

2019 ◽  
Vol 12 (06) ◽  
pp. 1950085 ◽  
Author(s):  
Di Zhao ◽  
Xuezheng An ◽  
Yaxian Sun ◽  
Guihua Li ◽  
Hongyan Liu ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Light Irradiation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photodegradation Efficiency

p-n heterojunction Ag2CO3/Ag3PO4/Ni thin films were prepared by electrochemical co-deposition. The surface morphology and structural properties of the thin films were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS). The photocatalytic (PC) properties of the Ag2CO3/Ag3PO4/Ni composite thin films were investigated by their ability to degrade rhodamine B (RhB) and Congo red (CR) under visible light irradiation. The results showed that the photodegradation efficiency of RhB by an Ag2CO3/Ag3PO4/Ni thin film under visible-light irradiation for 30[Formula: see text]min (98.84%) was 2.64 times higher than that of an Ag3PO4/Ni thin film and 3.44 times higher than of an Ag2CO3/Ni thin film. The presence of a [Formula: see text]-[Formula: see text] heterojunction greatly increased the charge conductivity of the film and its ability to photocatalytically reduce dissolved oxygen, which are the main reasons for the improved PC performance of the Ag2CO3/Ag3PO4/Ni films.

Immobilization of a Series of Homo/Heterobinuclear Metal (II) Phthalocyanine Hexasulphonates on Nanocrystalline TiO2 Thin Films and their Application in the Degradation of Methylene Blue

2011 ◽  
Vol 356-360 ◽  
pp. 1728-1732
Author(s):  
Yan Zhen Yang ◽  
Ren Jie Sun ◽  
Yu Cheng Wu ◽  
Li Tao ◽  
Cheng Wu Shi
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Methylene Blue ◽  
Catalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Dark Condition ◽  
Tio2 Thin Films ◽  
Nanocrystalline Tio2

A series of binuclear metal (II) phthalocyanine hexasulphonates, (M-M)Pc, including (Co-Co)Pc, (Co-Zn)Pc, (Co-Mn)Pc, (Zn-Zn)Pc, (Zn-Mn)Pc and (Mn-Mn)Pc were synthesized and immobilized on nanocrystalline TiO2 thin films. The nanocrystalline TiO2 thin film was characterized by SEM, XRD and profilometer. The catalytic activity of various (M-M)Pc/nanocrystalline TiO2 thin films was evaluated by the degradation of methylene blue (MB) with air as the oxidant under visible light irradiation and dark condition. The results indicated that the prepared nanocrystalline TiO2 thin film had good crystalline and uniform particle size distribution. According to the degradation results of MB, various homo/hetero (M-M)Pc can sensitize nanocrystalline TiO2 thin films and improve their photocatalytic activity under visible light irradiation. The catalytic activity of hetero (M-M)Pc/nanocrystalline TiO2 thin films were more effective than that of homo (M-M)Pc under both visible light irradiation and dark condition, and the air purging was essential in degradation of MB. Therefore, these (M-M)Pc/nanocrystalline TiO2 thin films can be applied to the degradation of MB as a promising catalyzer.

Novel Photocatalytic Ag/TiO2 Thin Film on Polyvinyl Chloride for Gaseous BTEX Treatment

2012 ◽  
Vol 712 ◽  
pp. 133-145 ◽  
Author(s):  
Piangjai Peerakiatkhajorn ◽  
Chamorn Chawengkijwanich ◽  
Wandee Onreabroy ◽  
Siriluk Chiarakorn
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Visible Light ◽  
Polyvinyl Chloride ◽  
Batch Reactor ◽  
Energy Dispersive Spectrometer ◽  
Wave Length ◽  
Sol Gel ◽  
Band Gap Energy ◽  
Molar Ratios

This study aims to provide the photocatalytic approach for treatment of some hazard air pollutants such as benzene, toluene, ethylbenzene and xylene (BTEX) under visible light. Silver doped titanium dioxide (Ag/TiO2) thin films with various molar ratios (0.01, 0.05, 0.1 and 0.2 mol) were synthesized via sol-gel method and dipped on polyvinyl chloride (PVC) sheet before curing with UV lamp. The X-ray diffractograms showed the composite of TiO2anatase and nanosilver. The effect of silver doping on decreasing of band gap energy of TiO2was observed from the absorption edge shift to higher wave length, analyzed by UV-visible spectrometer. The results from hydrophilicity test indicated that hydrophilicity of TiO2thin film was increased by doping silver. The morphology of the Ag/TiO2thin film studied by Scanning Electron Microscope equipped with an Energy Dispersive Spectrometer revealed well dispersed nanosilver on the smooth thin film. The BTEX degradation was carried out in a batch reactor with the initial concentration of mixed BTEX gas [25 ppm]. The remaining BTEX was examined by Gas Chromatography equipped with flame ionization detector. Among Ag/TiO2thin films, the 0.1 Ag/TiO2thin films exhibited the best performance for gaseous BTEX degradation under visible light. The maximum degradation efficiency was belong to xylene (89%), followed by ethylbenzene (86%), toluene (83%) and benzene (79%).

Vertically Aligned Nanocomposite Thin Films as a Cathode/Electrolyte Interface Layer for Thin-Film Solid Oxide Fuel Cells

2009 ◽  
Vol 19 (24) ◽  
pp. 3868-3873 ◽  
Author(s):  
Jongsik Yoon ◽  
Sungmee Cho ◽  
Jung-Hyun Kim ◽  
JoonHwan Lee ◽  
Zhenxing Bi ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Interface Layer ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Electrolyte Interface ◽  
Nanocomposite Thin Films ◽  
Vertically Aligned

scholarly journals A family of unsymmetrical hydroxyl-substituted BEDT-TTF donors: syntheses, structures and preliminary thin film studies

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 40205-40218 ◽  
Author(s):  
Qiang Wang ◽  
Matteo Zecchini ◽  
John D. Wallis ◽  
Yiliang Wu ◽  
Jeremy M. Rawson ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Charge Transfer ◽  
Film Studies ◽  
Charge Transfer Salts ◽  
Synthetic Routes

Synthetic routes to three novel OH-functionalized BEDT-TTF donorsH1–H3are presented. Charge transfer salts ofH1and2and polystyrene blend thin films ofH3have been studied after doping with iodine.

Preparation and Characterization of the Visible Light Responsive TiO2 Thin Film Photocatalysts Prepared by Magnetron Sputtering Method and Their Photocatalytic Activities for the Water Splitting Reactions

2005 ◽  
Vol 486-487 ◽  
pp. 81-84 ◽  
Author(s):  
Masaya Matsuoka ◽  
Masaaki Kitano ◽  
Masato Takeuchi ◽  
Masakazu Anpo ◽  
John M. Thomas
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetron Sputtering ◽  
Visible Light ◽  
Water Splitting ◽  
Glass Container ◽  
Proton Exchange ◽  
Light Irradiation ◽  
Tio2 Thin Films ◽  
Photocatalytic Activities

Visible light responsive TiO2 (Vis-TiO2) thin films were successfully developed by the radio-frequency magnetron sputtering method, and their photocatalytic activities for the water splitting reactions were investigated. Pt-loaded Vis-TiO2 thin films acted as photocatalysts to decompose water involving sacrificial reagent such as methanol or silver nitrate under visible light irradiation (λ³ 420 nm). Furthermore, the separate evolution of H2 and O2 was successfully achieved under solar light irradiation by applying these photocatalysts in a H-type glass container, which consists of two water phases separated by a TiO2 thin film and proton-exchange membrane.

The Preparation of Visible Light-Responsive TiO2 Thin Films by Applying a RF-Magnetron Sputtering Deposition Method and Their Photocatalytic Reactivity for the Decomposition of Water with a Separate Evolution of H2 and O2

2006 ◽  
Vol 317-318 ◽  
pp. 823-826 ◽  
Author(s):  
Masaaki Kitano ◽  
Hisashi Kikuchi ◽  
Takahiro Hosoda ◽  
Masato Takeuchi ◽  
Masaya Matsuoka ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetron Sputtering ◽  
Visible Light ◽  
Tio2 Thin Film ◽  
Rf Magnetron Sputtering ◽  
Light Irradiation ◽  
Deposition Method ◽  
Sputtering Deposition ◽  
Magnetron Sputtering Deposition Method

TiO2 (Vis-TiO2) thin films absorbing UV and visible light in regions of 250-600nm have been successfully developed by applying a radio-frequency (RF) magnetron sputtering deposition method. SIMS depth profiles of Vis-TiO2 revealed that the O/Ti ratio gradually decreases from the top surface (O/Ti ratio : 2.00 ± 0.01) to the inside (1.93 ± 0.01). This unique declined O/Ti composition (anisotropic structure) may be the origin of the significant perturbation in the electronic structure of Vis-TiO2, enabling the absorption of visible light and their high photocatalytic performance under visible light irradiation. In fact, it was found that the separate evolution of H2 and O2 from water could be successfully achieved under visible light or solar light irradiation by applying these thin film photocatalysts in an H-type glass container separating the two aqueous solutions by a TiO2 thin film and proton-exchange membrane, having H2 evolution from Pt side and O2 evolution from TiO2 thin film side, respectively.

scholarly journals SINTESIS LAPISAN TIPIS TiO2 BERPORI YANG DIMODIFIKASI OLEH NITROGEN DENGAN METODE PEROKSO SOL-GEL, KARAKTERISASI DAN APLIKASINYA SEBAGAI MATERIAL PEMBERSIH DIRI (SELF CLEANING MATERIAL)

2017 ◽  
Vol 9 (2) ◽  
pp. 6
Author(s):  
Diana Vanda Wellia
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Stearic Acid ◽  
Visible Light ◽  
Tio2 Thin Film ◽  
Anatase Phase ◽  
Film Surface ◽  
Visible Range ◽  
Tio2 Thin Films ◽  
Vis Spectroscopy

The photocatalytic properties of TiO2 compound in anatase phase can be activated under visible light by nitrogen modification and its ability can be increased by generated porous structure using polietilen glikol (PEG) on TiO2 thin film surface. The porous N/TiO2 thin films were prepared by heating aqueous peroxotitanate thin films by addition of polietilen glikol (PEG) deposited uniformly on superhydrophilic uncoated glass at 500 oC for 1 h. The result of X-ray diffraction (XRD) confirmed the resence of only anatase phase for all samples. The UV-Vis spectroscopy showed the synthesized porous N/TiO2 thin films exhibit the absorption in the visible range (400-500 nm). Photocatalytic activity of porous N/ TiO2 thin films were evaluated by using fourier transform-infrared spectroscopy (FTIR) to determine the ability of this photocatalyst for stearic acid degradation under visible light irradiation. The result showed that N/TiO2/PEG-2.1 thin film degraded the stearic acid was about 87,86%, which was 1,12 times higher than that of N-doped TiO2 and 9,9 times higher than that of undoped TiO2 thin film.

Visible-Blind Metal-Semiconductor-Metal Structured Deep-Ultraviolet Photodetectors Using Single-Crystalline Diamond Thin Film

2007 ◽  
Vol 546-549 ◽  
pp. 1759-1762
Author(s):  
Mei Yong Liao ◽  
Yasuo Koide
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Visible Light ◽  
Persistent Photoconductivity ◽  
Single Crystalline ◽  
Diamond Thin Film ◽  
Metal Semiconductor Metal ◽  
Deep Ultraviolet ◽  
Ultraviolet Photodetectors ◽  
Visible Blind

Metal-semiconductor-metal (MSM) planar photodiodes and photoconductors were fabricated on unintentionally doped homoepitaxial diamond thin films deposited on Ib and IIa-type diamond substrated. The MSM photoconductor on the epilayer grown on the Ib-type substrate exhibits the highest discrimination ratio up to 108 between 210 nm and visible light and a photocurrent gain around 33 at 220 nm. The persistent photoconductivity is rather week for such kind of photoconductor.

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