Post-synthetic modification of graphitic carbon nitride with PCl3 and POCl3 for enhanced photocatalytic degradation of organic compounds

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F22%3A00564314" target="_blank" >RIV/67985858:_____/22:00564314 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/22:10250394 RIV/61989100:27710/22:10250394 RIV/61989100:27730/22:10250394

Výsledek na webu

<a href="https://hdl.handle.net/11104/0336162" target="_blank" >https://hdl.handle.net/11104/0336162</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.diamond.2022.109439" target="_blank" >10.1016/j.diamond.2022.109439</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Post-synthetic modification of graphitic carbon nitride with PCl3 and POCl3 for enhanced photocatalytic degradation of organic compounds

Popis výsledku v původním jazyce

Graphitic carbon nitride (g-C3N4) was synthesised from melamine at 550 degrees C in the air for a period of 4 h. As such prepared g-C3N4 was dispersed in PCl3 and POCl3 with and without pyridine at an ambient temperature for us to dope g-C3N4 with phosphorus. The bulk structural properties of g-C3N4 examined by X-ray diffraction (XRD) and Fourier transformed infrared (FTIR) spectroscopy were not changed. On the contrary, a surface modification in terms of pore size distribution studied using physisorption of nitrogen and electron microscopy was observed. Using PCl3 (in the presence of pyridine), nitrogen vacancies were filled with phosphorus and phosphoramidate groups were formed (with and without pyridine). When POCl3 was used nitrogen vacancies were removed and the surface structure was rearranged, but no phosphorus was doped in g-C3N4. The band gap energies varied from 2.69 to 2.73 eV and specific surface areas varied from 8 to 11 m2 g-1.The g-C3N4 surface structure rearrangement was associated with altered electronic properties which led to higher photocatalytic activity observed by the degradation of Ofloxacin, Amoxicillin and Rhodamine B (RhB) under LED irradiation of 420 nm. A degradation efficiency decreased in the order: Ofloxacin > RhB > Amoxi-cillin. Superoxide radicals were found to be able to react with all the organic compounds, but holes could react only with Ofloxacin and RhB. All the modified materials were more active than the pristine g-C3N4 and the best photocatalyst was prepared through the reaction with PCl3 in the presence of pyridine.

Název v anglickém jazyce

Post-synthetic modification of graphitic carbon nitride with PCl3 and POCl3 for enhanced photocatalytic degradation of organic compounds

Popis výsledku anglicky

Graphitic carbon nitride (g-C3N4) was synthesised from melamine at 550 degrees C in the air for a period of 4 h. As such prepared g-C3N4 was dispersed in PCl3 and POCl3 with and without pyridine at an ambient temperature for us to dope g-C3N4 with phosphorus. The bulk structural properties of g-C3N4 examined by X-ray diffraction (XRD) and Fourier transformed infrared (FTIR) spectroscopy were not changed. On the contrary, a surface modification in terms of pore size distribution studied using physisorption of nitrogen and electron microscopy was observed. Using PCl3 (in the presence of pyridine), nitrogen vacancies were filled with phosphorus and phosphoramidate groups were formed (with and without pyridine). When POCl3 was used nitrogen vacancies were removed and the surface structure was rearranged, but no phosphorus was doped in g-C3N4. The band gap energies varied from 2.69 to 2.73 eV and specific surface areas varied from 8 to 11 m2 g-1.The g-C3N4 surface structure rearrangement was associated with altered electronic properties which led to higher photocatalytic activity observed by the degradation of Ofloxacin, Amoxicillin and Rhodamine B (RhB) under LED irradiation of 420 nm. A degradation efficiency decreased in the order: Ofloxacin > RhB > Amoxi-cillin. Superoxide radicals were found to be able to react with all the organic compounds, but holes could react only with Ofloxacin and RhB. All the modified materials were more active than the pristine g-C3N4 and the best photocatalyst was prepared through the reaction with PCl3 in the presence of pyridine.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Diamond and Related Materials

ISSN

0925-9635

e-ISSN

1879-0062

Svazek periodika

130

Číslo periodika v rámci svazku

DEC 2022

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

109439

Kód UT WoS článku

000880001100003

EID výsledku v databázi Scopus

2-s2.0-85139844247