Tungsten Oxide

Glucose exists in the nature by photosynthesis. Due to its abundant volume, low cost and reproducible, it is regarded as the main energy substrates to produce hydrogen. Glucose is the main waste of agriculture, food and paper-making industry, improper disposition will cause damage to environment. Recently many PEC systems produce hydrogen by glucose. Tungsten oxide connects with electrocatalyst to produce hydrogen from glucose shows good photocatalytic activity, deposit electrocatalyst on the surface of photocatalyst can promote photocatalytic activity of semiconductor. Electrocatalyst deposited on the surface of semiconductor will form a layer of cover. By changing electron distribution in the system, the surface property of WO 3  will be affected, so the photocatalytic activity is improved. Usually if Fermi level of WO 3  is higher than the two combined material, electron will keep migrating from WO 3  to depositing electrocatalyst. The shallow well potential Scho...

Electrochemical oxidation preparing nanoporous tungsten oxide electrode: 1) Treating method for tungsten foil: Firstly cut it into 10mm x 15mm pieces, using waterproof abrasive to polish it, then clean it with acetone, isopropanol, methyl alcohol and deionized water ultrasound cleaning for 15min, blow it with nitrogen gas. 2) Use tungsten foil as anode, Pt foil of 10 x 15mm as counter electrode, put them into electrobath, the distance between two electrodes is 25mm. Then put electrobath in water bath of constant temperature, adjust the bath temperature to control the reaction temperature. The reacting area is 0.88cm2. Adding a certain amount of ready-prepared 1mol/L（NH 4 ） 2 SO 4  solution electrolyte with different concentration of NH 4 F. 3) Clean the ready-prepared WO 3  nanoporous thin film with deionized water, blow-dry with nitrogen gas in the air and put them in muffle furnace, the heating rate is 5℃/min, cool it down to room temperature, then packed it to nanoporo...

To promote the photoelectrochemical property, we usually take the following methods: (1) Loading precious simple metal substance such as Pt, Ag, Au. Lay WO 3  over FTO with Ag grid, the testing photocurrent density is two times than the one without Ag. (2) Doping certain amount of metal ion or non-metal ion in tungsten oxide . Doping Ta 5+  in WO 3  photo electrode, the experiment shows that photoelectric conversion rate of doping electrode is much higher. (3) Recombine WO 3  with other inorganic semiconductor material, use impregnation method to prepare CuO/WO 3  composite material. It turns out that CuO/WO 3  shows better photo catalytic ethylal. (4) Recombine WO3 with organic material. Prepare PBrT/WO 3  and PMOT/WO 3  composite material. After testing it shows that the composite one has better electrochemical property. This paper mainly focuses on the research of Zn affects WO 3  thin film photoelectrode photoelectrochemical property...

Nano semiconductor material used as photocatalyst to photolysis water has gained well efficiency. TiO 2  has high catalytic activity and stability is widely used as a kind of photocatalytic material. But its band gap is big (~3.2 eV), it can only be motivated by ultraviolet with short wave length, its light transaction efficiency is low (~4%). Tungsten oxide is an indirect band series transition semiconductor material. Compared to TiO 2 , it has narrow band gap (2.5~3.0 eV), the relevant absorbing wave length is 410~500nm and well photoelectric responsive property in visible light area. Tungsten oxide thin film electrode preparation method: Raw material: FTO glass; tungstic acid; hydrogen peroxide; acetone. (1) Be ready with clean FTO glass as the substrate of depositing WO 3 . Cut FTO glass into 1.2cm*2.5cm pieces and clean it by ultrasound and ultraviolet. The clean and flatness of FTO substrate has big effect on adhesive force and uniformity of thin film electrode...

Nano semiconductor material used as photocatalyst to photolysis water has gained well efficiency. TiO 2  has high catalytic activity and stability is widely used as a kind of photocatalytic material. But its band gap is big (~3.2 eV), it can only be motivated by ultraviolet with short wave length, its light transaction efficiency is low (~4%). Tungsten oxide is an indirect band series transition semiconductor material. Compared to TiO 2 , it has narrow band gap (2.5~3.0 eV), the relevant absorbing wave length is 410~500nm and well photoelectric responsive property in visible light area. Tungsten oxide thin film electrode preparation method: Raw material: FTO glass; tungstic acid; hydrogen peroxide; acetone. (1) Be ready with clean FTO glass as the substrate of depositing WO 3 . Cut FTO glass into 1.2cm*2.5cm pieces and clean it by ultrasound and ultraviolet. The clean and flatness of FTO substrate has big effect on adhesive force and uniformity of thin film electrode. So be...

Glucose exists in the nature by photosynthesis. Due to its abundant volume, low cost and reproducible, it is regarded as the main energy substrates to produce hydrogen. Glucose is the main waste of agriculture, food and paper-making industry, improper disposition will cause damage to environment. Recently many PEC systems produce hydrogen by glucose. Tungsten oxide connect with electrocatalyst to produce hydrogen from glucose shows good photocatalytic activity, deposit electrocatalyst on the surface of photocatalyst can promote photocatalytic activity of semiconductor. Electrocatalyst deposited on the surface of semiconductor will form a layer of cover. By changing electron distribution in the system, the surface property of WO 3  will be affected, so the photocatalytic activity is improved. Usually if Fermi level of WO 3  is higher than the two combined material, electron will keep migrating from WO 3  to depositing electrocatalyst. The shallow well potential Schottk...

To promote the photoelectrochemical property, we usually take the following methods: (1) Loading precious simple metal substance such as Pt, Ag, Au. Lay WO 3  over FTO with Ag grid, the testing photocurrent density is two times than the one without Ag. (2) Doping certain amount of metal ion or non-metal ion in tungsten oxide . Doping Ta 5+  in WO 3  photo electrode, the experiment shows that photoelectric conversion rate of doping electrode is much higher. (3) Recombine WO 3  with other inorganic semiconductor material, use impregnation method to prepare CuO/WO 3  composite material. It turns out that CuO/WO 3  shows better photo catalytic ethylal. (4) Recombine WO3 with organic material. Prepare PBrT/WO 3  and PMOT/WO 3  composite material. After testing it shows that the composite one has better electrochemical property. This paper mainly focuses on the research of Zn affects WO 3  thin film photoelectrode photoelectrochemi...