Tungsten Trioxide Nano Plate Catalyst to Improve Solar Energy Conversion Efficiency

Solar energy is a very attractive green energy refers to solar thermal radiation, which the main manifestation is often said of sun's rays, and generally used in modern power generation or to provide energy for water heater. In the case of diminishing fossil fuels, solar energy has become an important part of human use of energy, and continues to develop. The usage of solar energy can be divided into two ways of photothermal conversion and photoelectric conversion, and solar power is an emerging renewable energy. However, for enhancing the solar energy conversion efficiency and storage capacity is still a long way to go.

tungsten trioxide photosolar cell picture
 
Recently, researchers from the University of Twente have found that chemical conversion of solar energy can be greatly accelerated by coating platinum particles on a special nano-plate. This nano flat catalyst is based on the tungsten trioxide nano-sized crystal structure which has a strong absorption capacity of light, to deposit the stronger light absorbance of platinum particles on the active surface of tungsten oxide through a special technique, thus greatly improve the solar energy conversion efficiency. Although this particular technology is not yet mature, and platinum coated particles can not be evenly distributed in the surface of the substrate, but the idea has provided a huge boost for the development of solar cells.
 
Tungsten trioxide (WO3), yellow powder, is an N-type transition metal semiconductor material, with special electrochromic, photochromic, gasochromic, gas sensitive and catalytic properties to be widely used in high-tech field. Tungsten trioxide has a wide range of applications in the catalyst, i.e. as a co-catalyst in SCR denitration catalyst, to play the role of anti-sulfur poisoning of catalyst, anti-sintering of the carrier; in the photocatalytic field, tungsten trioxide photocatalyst exhibits excellent performance in hydrogen production and oxygen evolution, and organic matter degradation by means of doping rare earth metals, composite semiconductors ect..

 

Tungsten Carbide International Fair will be Unveiled at Shanghai

Tungsten carbide 2016 Shanghai International Expo area of ​​30,000 square meters, is expected to reach more than 500 domestic and foreign exhibitors, professional audience of 30,000 people attended the Shanghai International Expo tungsten carbide is the tungsten carbide areas set product launches, technology exchange and business cooperation in one of the professional event.

1. The establishment of an international brand exhibition, high-tech products, technology, the first to release
Many well-known manufacturers at the show site will publish new equipment, new technology, new materials, allowing you to buy better assessment; open the current Shanghai International Expo Exhibitors List Tungsten carbide, we clearly feel Shanghai International Hard alloy Expo brand cohesion remains unsurpassed: Chinese and Japanese Han Qicheng more than well-known brands, as well as a growing number of overseas famous brand in here, both industry leaders, have extraordinary potential rookie. Include: Kim Shin Zigong, Zhuzhou Lihua, accessible Zhuzhou, Zhuzhou Maoxiang, Zhuzhou Kim Shin, Xiamen Tungsten, Jiujiang spoonbills, Renqiu forward, Shanghai Grand Holcim law, Yueqing source, the Shanghai Research Institute of Materials, Jinan metallurgy Sciences Co., Ltd., Hai Keli special alloy tool and die development Co., Ltd., Taiwan and the United States Yang technology, Xin Matilda, Hunan Dingli technology Co., Ltd., Weihai Wei hard, German PTV, Chen Hao Shanghai composite materials Co., Ltd., Shenyang Heng Jin vacuum Technology Co., Ltd. SGL specialty graphite (Shanghai) Co., Ltd., France Kay Pu Technology Group Shanghai office, Shanghai Oriental carbon Co., Germany Conner KonradFriedrichsTungsten carbide (KFC), Tokai carbon Yao and many other well-known enterprises.

tungsten carbide products2. "Three Exhibition Linkage" comprehensive interpretation of the metal processing industry chain event
Shanghai International Expo tungsten carbide through continuous upgrading of hardware and software, to optimize the structure of display, in October this year the show will be a new attitude in full bloom, become more popular Tungsten carbide industry event! Tungsten carbide Shanghai International Expo, Shanghai International cutting tools and equipment Exhibition and Shanghai international Exhibition abrasive grinding processing technology exhibition three linkage, will be held in Shanghai World Expo Exhibition October 11.

3. Professional forum the industry heavyweight mystery guest to visit the site
Over the same period will be held 2016CCME finishing Technology Forum and Shanghai International abrasive grinding technology seminars, conferences and adhere to the public nature of dry-based technology, is committed to providing various forms of flexible integration to share trends, the development of Internet technology and the latest developments, assess the latest trends in technology and operations; for technical, research and development personnel, business operators to explore new ideas, look for effective research.

4. 300 domestic and foreign media, broadcast throughout the show dynamic
Shanghai International Expo tungsten carbide and tungsten carbide gathered 300 domestic user industry media reached a strategic cooperation to form a public authority magazines, newspapers, websites, television in one powerful propaganda line-up, with the professional league to reach interactive media, publicity and promotion efforts Show information, to achieve aggregation of dissemination of information, to attract more audiences and downstream industry professionals attending the event, exchange, purchase.

Tungsten carbide 2016CCME Shanghai International Fair will be adhering to the "professionalism, effectiveness, quality, service" four exhibition service standards, more effort to build the field of Tungsten carbide exclusive event.

 

Tungsten Alloy Warhead Pushes R& D of Loitering Missile

tungsten alloy warhead imagetungsten alloy warhead image

The new concept of ammunition is one type of organic combined products from UAV (Unmanned Aerial Vehicle) technology and ammunition technology, which has strike, correspondent, target, monitor and other air alert functions.

Read more: Tungsten Alloy Warhead Pushes R& D of Loitering Missile

Incandescent Lamp Ending, LED Lamp New Era

In China, eyes of the night over several decades, incandescent lamps announce its ending on Oct. 1, 2016. The announcement of “China Phases out Incandescent Lamp Timeline” by Development and Reform Commission of the People’s Republic of China says China will forbidden import and sale incandescent lamp over 15W since Oct. 1, 2016.

incandescant lamp image

I Incandescent lamp phasing out timeline

Nov. 1, 2011 ~ Sep. 30, 2012
Transition period. The importer, seller shall be prepared working on elimination in accordance with the requirements of the government.

Oct. 1, 2012
The importing and selling of incandescent lamps over 100W are forbidden.

Oct. 1, 2014
The importing and selling of incandescent lamps over 60W are forbidden.

Oct. 1, 2015 ~ Sep. 30, 2016
Mid-evaluation period, based on the preliminary policy evaluation, the adjustment policy will be issued.

Oct. 1, 2016
The importing and selling of incandescent lamps over 15W are forbidden.

LED takes over incandescent lamp image

II Policy issuing

In Second half of 2006, the International Energy Agency released a report on the global lighting energy use noted that in 2005, total consumption of incandescent power terminal is 970 billion degrees, accounting for 37% of the global lighting electricity, equivalent to the carbon dioxide emissions of about 5.6 one hundred million tons. If the lamp phases out since 2008, it saves 38% of electricity for lighting until 2030, equaling to the cumulative reduction of 16.6 billion tons of carbon dioxide emissions.

Australia has been the first country to issue incandescent lamps phasing out plan in Feb. 2007. New Zealand, Germany, Portuguese and other tens of countries are put forward the same plan. So is China in 2011.

LED takes over incandescent lamps picture

III LED lamps taking over incandescent lamps

LED lamp and energy-saving lamps have taken over the ineffient lamps and have been the main force in lighting industry. The manufacturing cost has been decreasing a lot since 2011 for the increasing quantity used in families. In order to improve the use of LED lamps, government subsidies, discount provided, offered as premiums. Hard work pays off. The LED use rate is going up from under 10% in 2011 to 32% in 2015. it is expected to be 50% in 2020.

tungsten and molybdenum products in LED wafer growth furnace picture

IV Will Incandescent lamps over filaments

Incandescent lamps are one of the main applications of tungsten filament. However, the ending in China will promote the exporting of filaments and lamps. Meanwhile, tungsten wire will create its new application areas, but not limits in inefficient lamps.

V Popular use of LED will increase the apply of tungsten and molybdenum products

Due to the universal of LED lamps, the furnace to growing LED sapphire wafers consumption will increase to a new high. At the same time, tungsten and molybdenum products, including crucibles, heating elements, heating field, sheet shield, will be required in a large number. Thus, an ending era of incandescent lamps is a new start for tungsten and molybdenum materials.

 

Latest Research for Non-volatile Memory Device Uses WO3

Not long ago, James M. Tour of Rice University group by anodic treatment to obtain a flexible nano-porous (NP) WO3-xRRAM at room temperature. The Task Force found that the flexibility of NP WO3-x RRAM exhibits bipolar switching property and high Ion/Ioff ratio (approximately 105); at the same time, this device has a stable holding time (more than 5×105s) and excellent pole uniformity between the elements; besides, in the conditions of flat or the maximum bending, the degrees of resistance to bending are more than 103 cycles. Research indicates, the flexible resistive memory (RRAM) has a great prospect in the future non-volatile memory device, this time the discovery of ACS nano flexible WO3-x non-volatile memory device becomes the latest research of tungsten trioxide (WO3) in non-volatile memory device, and expanding the application fields of WO3.
 
WO3 in nonvolatile memory device
In addition, in 2015, Professor Xie Yi, USTC has made new progress on the high-performance of flexible non-volatile  memory device, synthesized excellent storage property based on WO3•H2O thin nano-sheets and assembled into Cu/WO3•H2O/ITO-PET flexible non-volatile  memory device. Further, the group also proposed novel mechanism of resistance change memory which is contributing to the further research and development of mechanism of resistive non-volatile memory.
 
Further reading: Non-volatile memory, nonvolatile memory, NVM or non-volatile storage is a type of computer memory that can retrieve stored information even after having been power cycled (turned off and back on). Examples of non-volatile memory include read-only memory, flash memory, ferroelectric RAM (F-RAM), most types of magnetic computer storage devices (e.g. hard disk drives, floppy disks, and magnetic tape), optical discs, and early computer storage methods such as paper tape and punched cards. Non-volatile memory is typically used for the task of secondary storage, or long-term persistent storage. The most widely used form of primary storage today is a volatile form of random access memory (RAM), which means that when the computer is shut down, anything contained in RAM is lost. However, most forms of non-volatile memory have limitations that make them unsuitable for use as primary storage. Typically, non-volatile memory costs more, provides lower performance, or has worse write endurance than volatile random access memory. Non-volatile data storage can be categorized in electrically addressed systems (read-only memory) and mechanically addressed systems (hard disks, optical disc, magnetic tape, holographic memory, and such). Electrically addressed systems are expensive, but fast, whereas mechanically addressed systems have a low price per bit, but are slow. Non-volatile memory may one day eliminate the need for comparatively slow forms of secondary storage systems, which include hard disks.

 

 

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