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As shown in Fig. X, the presence of ClO4− (10 mmol) enhanced the RhB degradation, revealing that there existed a strong inner-sphere interaction between the S2O8- and the active sites on the catalyst surface. The enhanced oxidation efficiency may due to the high oxidation potential of perchlorate (1.389 V).

However, the presence of 10 mmol NO3−, HCO3− or H2PO4− exhibited different degrees of inhibition effect. These anions are considered as radical(such as SO4•− quenchers.
£¨ÌرðÊÇϱßÕ⼸¾ä£¬Äܸĵĵط½¸Ð¾õºÜÉÙ£©NO3−can rapidly react with SO4−at the rate constant of 8.8 ¡Á 108 M−1s−1 .HCO3−can also rapidly react with SO4•−and HO• to produce the HCO3• at the rate constants of 1.6 ¡Á 106 M−1s−1and 8.5 ¡Á 106 M−1s−1, respectively, while H2PO4− reacts with SO4•− and HO• to produce the H2PO4•  at the rate constants of £¼ 7.2 ¡Á 104 M−1s−1and 2.0 ¡Á 104 M−1s−1, respectively. The obtained active species such as NO3•,HCO3• and H2PO4• would compete with HO• or SO4•−for reaction with RhB, resulting in decreasing the RhB decolorization efficiency.

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It can be seen in Fig. X that, the presence of ClO4− (10 mmol) boosted the RhB degradation, demonstrating that a strong inner-sphere interaction existing between the S2O8- and the active sites on the catalyst surface. The higher oxidation efficiency may contribute to the high oxidation potential of perchlorate (1.389 V).

However, the 10 mmol NO3−, HCO3− or H2PO4−present in the reactants demonstrated different degrees of inhibition effect. These anions are radical  as considered (such as SO4•− quenchers.

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2Â¥2019-04-03 13:44:22
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

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Ìú³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by lihx_susan at 2019-04-03 13:44:22
It can be seen in Fig. X that, the presence of ClO4− (10 mmol) boosted the RhB degradation, demonstrating that a strong inner-sphere interaction existing between the S2O8- and the active sites  ...

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