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光触媒到底是否存在二次污染?
来源:http://www.kqjczl.cn    添加日期:2020-05-18 10:22:42    浏览次数:
  近年来,装修话题更热门的讨论是装修污染比生病、危及生命导致人死亡。随着事件的频繁,新装修的家庭除了采取传统的通风、植物吸附外处理,剩下更直接的处理方式是找公司进行有效治理。
  In recent years, the most popular topic of decoration is that the pollution ratio of decoration is sicker and life-threatening. With the frequent incidents, in addition to the traditional ventilation and plant absorption, the most direct way to deal with the rest is to find a professional company for effective governance.
  随着网络传播的发展,大多数人在互联网和微信等社交软件上都在讨论企业使用的“光催化剂”是否会产生二次污染,这一谣言让消费者陷入了恐慌和担忧的状态。
  With the development of Internet communication, most people are discussing whether the "Photocatalyst" used by enterprises will cause secondary pollution on the Internet, wechat and other social software, which makes consumers fall into a state of panic and worry.
  那么,什么样的材料是光催化剂呢
  So, what kind of material is photocatalyst
  在应用领域可以解决哪些问题?为此,我们结合相关专家和行业总结:
  What problems can be solved in the application field? To this end, we combine relevant experts and industry summary:
  光催化剂:光和催化剂的结合。光催化剂是纳米级TiO2光致敏材料的通称,具有光催化作用,是目前世界上更理想的室内空气污染控制药物材料。这种反应不产生“二次污染”。此外,该光催化剂的使用时间长,维护成本低。TiO2是一种无污染、无毒、安全的环境处理材料。
  Photocatalyst: the combination of light and catalyst. Photocatalyst is the general name of nano-TiO2 photo sensitizing material, which has the function of photocatalysis and is the most ideal indoor air pollution control drug material in the world. This reaction does not produce "secondary pollution". In addition, the photocatalyst has a long use time and low maintenance cost. TiO2 is a kind of pollution-free, non-toxic and safe environmental treatment material.
  光催化剂TiO2光激发时,价带(VB)电子通过静态带跃迁到导带(CB),从而在导带中积累电子(e-),在价带中形成光生空穴(h+),实现电子与空穴的分离。氧或水分子可以被激发成超氧自由基(O?·-)和羟基自由基(?OH)和其它具有强氧化性的自由基。因此,它常被用于降解环境中的有机污染物。
  When the photocatalyst TiO2 is excited by light, the valence band (VB) electrons transition to the conduction band (CB) through the static band, thus accumulating electrons (E -) in the conduction band, forming photogenerated holes (H +) in the valence band, realizing the separation of electrons and holes. Oxygen or water molecules can be excited into superoxide radicals (o? · -) and hydroxyl radicals (? Oh) and other radicals with strong oxidation. Therefore, it is often used to degrade organic pollutants in the environment.
济南装修污染治理
  日本在光催化空气净化设备的研发方面一直走在技术和市场的前列,是光催化技术的国家。
  Japan has always been in the forefront of technology and market in the research and development of photocatalytic air purification equipment, and is a leading country in photocatalytic technology.
  1972年,日本学者藤岛和本田报道了氧化钛被用作光催化剂来分解水制备氢气。之后,人们继续对纳米tio2光催化材料进行深入研究,发现纳米tio2在废水和废气净化、光能转换、抗菌除臭等领域具有很强的应用价值。
  In 1972, Japanese scholars Fujishima and Honda first reported that titanium oxide was used as photocatalyst to decompose water to produce hydrogen. After that, people continue to study nano-TiO2 photocatalysis materials, and find that nano-TiO2 has a strong application value in wastewater and waste gas purification, light energy conversion, antibacterial deodorization and other fields.
  到目前为止,光催化净化室内空气的技术仍在不断发展,但仍以日本为主。近年来在该领域申请的中,大部分空气净化器是吸附和光催化的复合产品,有的还具有净化室内空气、调节温度等功能。
  So far, the technology of photocatalytic purification of indoor air is still developing, but Japan is still the main one. In recent years, most of the patents applied in this field are composite products of adsorption and photocatalysis, some of which have the functions of purifying indoor air and regulating temperature.
  在日本,防污染、抗菌、亲水材料等方面已达到实用水平,并形成了大规模的性产业。近年来,中国一直在引进日本高科技产品,开发新的室内空气净化产品,但与日本仍有很大差距。
  In Japan, anti pollution, antibacterial, hydrophilic materials and other aspects have reached the practical level, and formed a large-scale sex industry. In recent years, China has been introducing Japanese high-tech products and developing new indoor air purification products, but there is still a big gap with Japan.
  光催化技术不仅可以消除室内有毒有害气体,还可以消除温室气体对大气的污染。目前,光催化反应可以快速有效地降解2000多种难降解物质。特别是室内空气污染净化领域,二氧化钛光激发产生的电子和空穴,然后产生的强氧化自由基反应,可以在室内甲醛、苯等挥发性物质达到矿化,H2O和CO2的形成,并且不产生“二次污染”在中间,这就是为什么说光催化剂不会产生二次污染。而这也是目前解决室内环境污染较为有效的措施。
  Photocatalytic technology can not only eliminate indoor toxic and harmful gases, but also eliminate the pollution of greenhouse gases to the atmosphere. At present, photocatalysis can degrade more than 2000 kinds of refractory substances rapidly and effectively. In particular, in the field of indoor air pollution purification, the electrons and holes generated by titanium dioxide light excitation, and then the strong oxidation free radical reaction can mineralize the volatile substances such as formaldehyde and benzene in the room, form H2O and CO2, and do not produce "secondary pollution" in the middle, which is why the photocatalyst will not produce secondary pollution. This is also an effective measure to solve indoor environmental pollution.
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