Chinese Journal of Magnetic Resonance ›› 2021, Vol. 38 ›› Issue (3): 403-413.doi: 10.11938/cjmr20202815
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Xing-xing NIU1,Zhi-jie BAI2,Yi YANG2,Yang-wen GAO2,Xue-lu WANG1,*(),Ye-feng YAO1,*()
Received:
2020-03-09
Online:
2021-09-05
Published:
2020-05-06
Contact:
Xue-lu WANG,Ye-feng YAO
E-mail:xlwang@phy.ecnu.edu.cn;yfyao@phy.ecnu.edu.cn
CLC Number:
Xing-xing NIU,Zhi-jie BAI,Yi YANG,Yang-wen GAO,Xue-lu WANG,Ye-feng YAO. A Quantitative Study of Photocatalytic Reduction of Cr(Ⅵ) by Operando Low-Field NMR Relaxometry[J]. Chinese Journal of Magnetic Resonance, 2021, 38(3): 403-413.
Table 1
T2 values and absorbance values and in Cr(Ⅲ) and Cr(Ⅵ)-Cr(Ⅲ) systems measured by LF-NMR and ultraviolet spectroscopy, separately
紫外分光光度法Cr(Ⅲ)体系 | 紫外分光光度法Cr(Ⅵ)-Cr(Ⅲ)混合体系 | LF-NMR法Cr(Ⅲ)体系 | LF-NMR法Cr(Ⅵ)-Cr(Ⅲ)混合体系 | |||||||
Cr(Ⅲ)浓度/(mg/L) | Cr(Ⅲ)-EDTA吸光度 | Cr(Ⅵ)-Cr(Ⅲ)浓度/(mg/L) | Cr(Ⅲ)-EDTA吸光度 | Cr(Ⅲ)浓度/(mg/L) | T2/s | Cr(Ⅵ)-Cr(Ⅲ)浓度/(mg/L) | T2/s | |||
1 | 0.007 | 20-0 | 0 | 1 | 1.528 | 20-0 | 3.105 | |||
5 | 0.024 | 15-5 | 0.021 | 5 | 0.623 | 15-5 | 0.604 | |||
10 | 0.038 | 10-10 | 0.044 | 10 | 0.375 | 10-10 | 0.363 | |||
15 | 0.056 | 5-15 | 0.056 | 15 | 0.276 | 5-15 | 0.267 | |||
20 | 0.066 | 0-20 | 0.066 | 20 | 0.216 | 0-20 | 0.216 |
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