Luminescent solar concentrators (LSCs) with styrene (ST) and methylmethacrylate (MMA) of different percentage as the matrix were prepared by a casting method using ponceau 2R. DSC has been used to compare the thermal ...Luminescent solar concentrators (LSCs) with styrene (ST) and methylmethacrylate (MMA) of different percentage as the matrix were prepared by a casting method using ponceau 2R. DSC has been used to compare the thermal stability of the different LSCs. FTIR spectroscopy shows that appearance of -N=N- for ponceau 2R in all ST/MMA matrixes indicating that the highest stability of this kind of dye in these matrixes. The values of the optical band gap (Eg) have been obtained from direct allowed transition before and after the samples have been exposed to sunlight for 9 weeks. Photodegradation studies revealed that the more photostable dye doped in PMMA matrix than in other matrixes. The results showed that the homo PMMA/ponceau 2R system has the highest fluorescence quantum yield (Qf). Therefore this sample can be selected for field performance of fluorescent solar collectors. The photovoltaic cell coupled with homo PMMA/2R LSC shows a maximum efficiency, 2% compared to the normal one.展开更多
The mechanism of oxidation and degradation effect of phytate-modified biochar catalyzed persulfate on Ponceau 2R was investigated.Chemical-structural properties of phytate-modified biochar,such as surface morphology a...The mechanism of oxidation and degradation effect of phytate-modified biochar catalyzed persulfate on Ponceau 2R was investigated.Chemical-structural properties of phytate-modified biochar,such as surface morphology and surface oxygen-containing functional groups were characterized.The results suggest that modified biochar has better oxidation performance than unmodified biochar,and the modified biochar generated at 500℃pyrolysis temperature can catalyze peroxymonosulfate(PMS)system with high efficiency,in large pH and temperature scope.And the degradation mechanism of Ponceau 2R by biochar-catalyzed PMS generation(BC-PMS)system was researched.It revealed that PBC300(phytate-modified biochar pyrolyzed at 300℃),PBC500(phytate-modified biochar pyrolyzed at 500℃),and PBC700(phytate-modified biochar pyrolyzed at 700℃)may have metaphosphoric acid linked to oxygen atoms and metaphosphoric acid linked in a bridging manner on the surface of biochar,catalyzing the production of hydroxyl radicals by PMS.PBC700 catalyzes the production of singlet oxygen by PMS through its structural defects,and singlet oxygen is the main catalytic product of PBC700.展开更多
目的用微波加热作丽春红-苦味酸-维多利亚蓝染色分析。方法采用丽春红-苦味酸-维多利亚蓝（Ponceau-Victoria blue B）染色分实验组（用微波加热）与对照组（不用微波,只用原法分析）,共检测子宫肌瘤10例,女性乳腺纤维腺瘤10例及男性前...目的用微波加热作丽春红-苦味酸-维多利亚蓝染色分析。方法采用丽春红-苦味酸-维多利亚蓝（Ponceau-Victoria blue B）染色分实验组（用微波加热）与对照组（不用微波,只用原法分析）,共检测子宫肌瘤10例,女性乳腺纤维腺瘤10例及男性前列腺增生30例。结果用Ponceau-Victoria blue B者,不论是实验组还是对照组,其胶原纤维呈红色,肌纤维呈黄色;用微波加热者,染色时间缩短,保存时间延长,染色3-4周后照相,彩色反差仍明显。结论微波加热适用于Ponceau-Victoria blue B染色,染色后切片保存的时间较长;胶原纤维（红色）与平滑肌纤维（黄色）的反差也不错,有助于鉴别两种不同来源的肿瘤。展开更多
文摘Luminescent solar concentrators (LSCs) with styrene (ST) and methylmethacrylate (MMA) of different percentage as the matrix were prepared by a casting method using ponceau 2R. DSC has been used to compare the thermal stability of the different LSCs. FTIR spectroscopy shows that appearance of -N=N- for ponceau 2R in all ST/MMA matrixes indicating that the highest stability of this kind of dye in these matrixes. The values of the optical band gap (Eg) have been obtained from direct allowed transition before and after the samples have been exposed to sunlight for 9 weeks. Photodegradation studies revealed that the more photostable dye doped in PMMA matrix than in other matrixes. The results showed that the homo PMMA/ponceau 2R system has the highest fluorescence quantum yield (Qf). Therefore this sample can be selected for field performance of fluorescent solar collectors. The photovoltaic cell coupled with homo PMMA/2R LSC shows a maximum efficiency, 2% compared to the normal one.
基金the 13th Five-Year key research program of China(2017YFB0308303)Key Research&Development programs of Shaanxi Province(2018SF363)Key Research&Development programs of Weiyang District,Xian(202043).
文摘The mechanism of oxidation and degradation effect of phytate-modified biochar catalyzed persulfate on Ponceau 2R was investigated.Chemical-structural properties of phytate-modified biochar,such as surface morphology and surface oxygen-containing functional groups were characterized.The results suggest that modified biochar has better oxidation performance than unmodified biochar,and the modified biochar generated at 500℃pyrolysis temperature can catalyze peroxymonosulfate(PMS)system with high efficiency,in large pH and temperature scope.And the degradation mechanism of Ponceau 2R by biochar-catalyzed PMS generation(BC-PMS)system was researched.It revealed that PBC300(phytate-modified biochar pyrolyzed at 300℃),PBC500(phytate-modified biochar pyrolyzed at 500℃),and PBC700(phytate-modified biochar pyrolyzed at 700℃)may have metaphosphoric acid linked to oxygen atoms and metaphosphoric acid linked in a bridging manner on the surface of biochar,catalyzing the production of hydroxyl radicals by PMS.PBC700 catalyzes the production of singlet oxygen by PMS through its structural defects,and singlet oxygen is the main catalytic product of PBC700.
文摘目的用微波加热作丽春红-苦味酸-维多利亚蓝染色分析。方法采用丽春红-苦味酸-维多利亚蓝（Ponceau-Victoria blue B）染色分实验组（用微波加热）与对照组（不用微波,只用原法分析）,共检测子宫肌瘤10例,女性乳腺纤维腺瘤10例及男性前列腺增生30例。结果用Ponceau-Victoria blue B者,不论是实验组还是对照组,其胶原纤维呈红色,肌纤维呈黄色;用微波加热者,染色时间缩短,保存时间延长,染色3-4周后照相,彩色反差仍明显。结论微波加热适用于Ponceau-Victoria blue B染色,染色后切片保存的时间较长;胶原纤维（红色）与平滑肌纤维（黄色）的反差也不错,有助于鉴别两种不同来源的肿瘤。
