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国家自然科学基金(21277004)

作品数:3 被引量:4H指数:1
相关作者:张建伟张晓宋寒尚静李前更多>>
相关机构:北京大学更多>>
发文基金:国家自然科学基金北京市自然科学基金更多>>
相关领域:理学一般工业技术环境科学与工程化学工程更多>>

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Simulated reaction of formaldehyde and ambient atmospheric particulate matter using a chamber
2017年
The reaction of HCHO with Beijing winter's real ambient particulate matter (PM) inside a 3.3 m3 Teflon Chamber was conducted in this study. NO2, OB and H20 gases were removed from the ambient aerosol before entering into the chamber. The decays of HCHO were monitored (acetylacetone spectrophotometry method) during the reactions at different PM number concentrations (Na) and relative humidities (RHs), and the formed particulate formate was detected by IC and XPS techniques. The results showed that when RH was 10%-15%, the decay rate of HCHO in the chamber was higher with the existence of PM from relatively clean days (with number concentration (Na) 〈 200,000 particle/L, 0.35-22.5 μm) compared to dirty days (Na 〉 200,000 particle/L, 0.35-22.5 μm). When RH increased to 30%- 45%, PM can hardly have significant influences on the decay of HCHO. The formations of formate on the reacted PM were consistent with the HCHO decay rates at different ambient PM Na and RH conditions. This is a first study related to the "real" ambient PM reacted with HCHO and suggested that in the clean and low RH days, PM could be an effective medium for the conversion of HCHO to formate.
Yueyue ChenJia LiuJing ShangTong Zhu
载钛羟基磷灰石光催化降解内分泌干扰物双酚A(英文)被引量:3
2014年
对载钛羟基磷灰石(TiHAP)进行了透射电镜、X射线衍射、紫外-可见光谱和Zeta电位表征,并应用液相色谱-质谱技术对比了TiHAP和P25 TiO2对环境内分泌干扰物双酚A(BPA)的吸附和光催化降解性能,探讨了富里酸和Fe3+对TiHAP薄膜光催化性能的影响.结果表明,TiHAP和TiO2粉体对BPA的吸附符合Langmuir吸附等温方程,且前者吸附性能更大.TiHAP薄膜光催化降解BPA的性能优于TiO2薄膜;富里酸和Fe3+对TiHAP和TiO2薄膜光催化性能的影响趋势不同,从能带结构、电子转移和吸光性等角度分析了性能不同的原因.本结果可以为应用TiHAP降解环境内分泌干扰物提供依据.
李前冯想张晓宋寒张建伟尚静孙卫玲朱彤若村正人塚田峰春陆应亮
关键词:光催化双酚A二氧化钛
Efficient photoelectrochemical oxidation of rhodamine B on metal electrodes without photocatalyst or supporting electrolyte被引量:1
2018年
Xuejiao WangXiang FengJing Shang
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