Surface-sulfurized Ag_2O nanoparticles with stable full-solar-spectrum photocatalytic activity

Ag2O has attracted much recent attention,because of its high photocatalytic activity in the ultraviolet(UV)‐visible region.However,there have been few reports on the near‐infrared(NIR)photocatalytic activity of Ag2O.This paper reports the high NIR photocatalytic activity of Ag2O nanoparticles.Ag2O is unsuitable for application in full‐solar‐spectrum photocatalysis,because it is unstable under UV irradiation.A surface sulfurization process was carried out to address this issue.Specifically,a layer of Ag2S2O7nanoparticles was grown on the surface of the Ag2O nanoparticles,to improve the stability of the Ag2O photocatalyst and enhance its photocatalytic activity in the UV,visible and NIR regions.The Ag2O/Ag2S2O7heterostructure is a stable and efficient full‐solar‐spectrum photocatalyst.It has potential application in the photodegradation of organic pollutants,and more generally in environmental engineering where full utilization of the solar spectrum is required.

中国与东盟商品贸易的合作与成长空间--基于竞争性与互补性数据的分析

运用出口相似性指数、贸易相似度指数、Lafay指数、市场提供指数与增加值分解方法,分析中国与东盟商品贸易的竞争性与互补性、比较优势差异与市场提供能力,进而考察中国与东盟商品贸易的合作与成长空间是否在面临缩窄。分析结果表明,中国与东盟在低技术产品的贸易合作空间依旧在扩大,而在中高技术产品上呈现出更强的竞合一体化状态,竞争性与合作性在不同的领域都有所加强。中国应采取直接投资结构差异化、"一带一路"框架下的产业合作、活跃企业创新投融资活动等措施应对中高技术领域的竞合一体化状态,在区域经济合作机制中继续推动低技术产品贸易,并协助东盟改善产业环境,推动进一步的产业分工。