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- Title
In situ growth of carbon nitride on titanium dioxide/hemp stem biochar toward 2D heterostructured photocatalysts for highly photocatalytic activity.
- Authors
Peng, Xiaoming; Wang, Min; Dai, Hongling; Qiu, Fengxian; Hu, Fengping
- Abstract
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 TiO2 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.
- Subjects
HSBC Holdings PLC; TITANIUM nitride; NITRIDES; TITANIUM dioxide; BIOCHAR; PHOTOCATALYSTS; NITROGEN in water
- Publication
Environmental Science & Pollution Research, 2020, Vol 27, Issue 31, p39198
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-020-09381-0