Question

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In this paper, the degradation of an azo dye Orange G (OG) on nitrogen-doped TiO2 photocatalysts has been investigated under visible light and sunlight irradiation. Under visible light irradiation, the doped TiO2 nanocatalysts demonstrated higher activity than the commercial Dugussa P25 TiO2, allowing more efficient utilization of solar light, while under sunlight, P25 showed higher photocatalytic activity. According to the X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV–vis spectr analyses, it was found that both the nanosized anatase structure and the appearance of new absorption band in the visible region caused by nitrogen doping were responsible for the significant enhancement of OG degradation under visible light. In addition, the photosensitized oxidation mechanism originated from OG itself was also considered contributing to the higher visible-light-induced degradation efficiency. The effect of the initial pH of the solution and the dosage of hydrogen peroxide under different light sources was also investigated. Under visible light and sunlight, the optimal solution pH was both 2.0, while the optimal dosage of H2O2 was 5.0 and 15.0 mmol/l, respectively.
Azodyes, which are characterized by the presence of one or more azo bonds ( N N ), are among the most notorious widespread environmental pollutants associated with textile,cosmetic, food colorants, printing, and pharmaceutical indus-tries. Because of their non-degradability, toxicity, potential mutagenicity and carcinogenicity, wastewaters originating from these dyes production or application industries pose a major threat to the surrounding ecosystems and human beings’ health.[1–3].Environmental concerns and the need of meeting the strin-gent international standards for rejecting wastewaters has made the development of novel and cost-effective processes for the purification of azo dyes effluents an issue of major technological importance.

Answer 1

In this paper, the degradation of an azo dye Orange G (OG) on nitrogen-doped TiO2 photocatalysts has been investigated under visible light and sunlight irradiation.
在本文中,降解偶氮染料的橙色克(噩)在nitrogen-doped二氧化钛光触媒已被调查在可见光与阳光照射。

Under visible light irradiation, the doped TiO2 nanocatalysts demonstrated higher activity than the commercial Dugussa P25 TiO2, allowing more efficient utilization of solar light, while under sunlight, P25 showed higher photocatalytic activity.
在可见光照射,掺杂二氧化钛nanocatalysts证明商业Dugussa较高的活性比P25二氧化钛,让更多的有效利用太阳能光,而在阳光下,P25显示高催化活性。

According to the X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV–vis spectr analyses, it was found that both the nanosized anatase structure and the appearance of new absorption band in the visible region caused by nitrogen doping were responsible for the significant enhancement of OG degradation under visible light.
根据x射线衍射仪(XRD)、x射线光电子能谱(XPS)和紫外吸收spectr分析,发现两者的纳米anatase结构和外观的新型吸声乐队在可见光区域造成氮掺杂负责降解明显提高可见光下王噩国的二城。

In addition, the photosensitized oxidation mechanism originated from OG itself was also considered contributing to the higher visible-light-induced degradation efficiency.
此外,论述了氧化机制源于噩本身还被认为是导致了更高的visible-light-induced降解效率。

The effect of the initial pH of the solution and the dosage of hydrogen peroxide under different light sources was also investigated.
效果的初始溶液酸度的过氧化氢的用量下研究了各种不同的光源。

Under visible light and sunlight, the optimal solution pH was both 2.0, while the optimal dosage of H2O2 was 5.0 and 15.0 mmol/l, respectively.
可见光和阳光下,最优解,而既2.0 pH值的最优用量5.0和15.0过氧化氢中毒/ l,分别。

Azodyes, which are characterized by the presence of one or more azo bonds ( N N ), are among the most notorious widespread environmental pollutants associated with textile,cosmetic, food colorants, printing, and pharmaceutical indus-tries.
Azodyes,其特点是在场的一个或更多的氮(N N),债券是属于最臭名昭著的普遍存在的环境污染物相关纺织、化妆品、食品着色剂、印刷、和制药indus-tries。

Because of their non-degradability, toxicity, potential mutagenicity and carcinogenicity, wastewaters originating from these dyes production or application industries pose a major threat to the surrounding ecosystems and human beings’ health.[1–3].Environmental concerns and the need of meeting the strin-gent international standards for rejecting wastewaters has made the development of novel and cost-effective processes for the purification of azo dyes effluents an issue of major technological importance.
因为他们的non-degradability、毒性、潜在致癌性和丰水期,源自这些染料废水生产或应用产业构成重大威胁到周围的生态系统和人类的健康。[1 - 3].Environmental问题,需要满足国际标准strin-gent拒绝废水,取得了发展商的小说及高性价比的提纯工艺偶氮染料废水问题的主要技术的重要性。