Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 27, Issue 31, Pages 39198-39210Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-09381-0
Keywords
Ammonia nitrogen; Hemp stem biochar carbon; TiO2; C3N4; Photocatalytic
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Funding
- Natural Science Foundation of China [51908213, 61872141]
- Natural Science Foundation of Jiangxi Province [20192BAB216029, 20181BAB206037, 20192BCD40013]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRF19015]
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In this work, hierarchical structure TiO2/hemp stem biochar carbon (HSBC) and C3N4-TiO2/HSBC were successfully fabricated, which were used as efficient visible-light photocatalyst degradation for ammonia nitrogen from aqueous solution. The as-prepared C3N4-TiO2/HSBC hybrid catalyst showed the higher efficient photocatalytic activity for decomposition of ammonia nitrogen than those of pure TiO(2)and TiO2/HSBC, suggesting suppressed recombination of photogenerated charges and promoted mass transfer due to synergistic effect, and thus increased photocatalytic degradation activity. The degradation of ammonia follows a pseudo-first-order kinetics. All prepared catalysts demonstrated extremely photocatalytic efficiency under visible-light and UV light illumination; the ammonia nitrogen photocatalytic degradation activity of C3N4-TiO2/HSBC can reach 90.3% under UV light while the degradation activity achieved about 50.7% under visible-light irradiation. The results revealed that the h(+)was dominantly active intermediates in the process of photocatalytic degradation. The prepared catalysts are promising for the degradation of ammonia nitrogen from water resource.
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