π-π stacking derived from graphene-like biochar/g-C3N4 with tunable band structure for photocatalytic antibiotics degradation via peroxymonosulfate activation

Tang, Rongdi; Gong, Daoxin; Xiong, Sheng; Zheng, Jun; Li, Ling; Zhou, Zhanpeng; Su, Long; Zhao, Jia

doi:10.1016/j.jhazmat.2021.126944

Cited by 146 publications

(23 citation statements)

References 67 publications

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“…When the solution pH is between 3.3 and 7.7, it exists as neutral TCH 2 . For a solution of pH > 7.7 it exists as an anion, TCH – or TCH 2 – . Therefore, the adsorption of TC on the surface of the g-C 3 N 4 @Cs 0.33 WO 3 heterojunction decreased with an increase in the pH of the solution.…”

Section: Resultsmentioning

confidence: 98%

“…Moreover, the band gap of the photocatalyst, which is an important parameter in photocatalysis, was determined by using the Kubelka–Munk formula 52 from DRS, and the plots of (α h ν) 1/2 versus h ν, where h , α, and ν denote Planck’s constant, absorption coefficient, and light frequency, respectively, are displayed in Figure 3 a–c. From the results, the calculated band gap energies ( E g ) of g-C 3 N 4 , Cs 0.33 WO 3 , and g-C 3 N 4 @Cs 0.33 WO 3 were 2.50, 2.58, and 2.26 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Consequently, the developed g-C 3 N 4 @Cs 0.33 WO 3 heterojunction demonstrated Vis, UV, and NIR light absorption capabilities throughout the solar spectrum, which is very important for improving the photocatalytic activity. Moreover, the band gap of the photocatalyst, which is an important parameter in photocatalysis, was determined by using the Kubelka−Munk formula 52 from DRS, and the plots of (αhν) 1/2 versus hν, where h, α, and ν denote Planck's constant, absorption coefficient, and light frequency, respectively, are displayed in Figure 3a−c. From the results, the calculated band gap energies (E g ) of g-C 3 N 4 , Cs 0.33 WO 3 , and g-C 3 N 4 @Cs 0.33 WO 3 were 2.50, 2.58, and 2.26 eV, respectively.…”

Section: Photoelectrochemical and Optical Analysesmentioning

confidence: 99%

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Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Tessema

Motora

2022

ACS Omega

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This study facilitates the synthesis of a graphitic carbon nitride/cesium tungsten oxide (g-C3N4@Cs0.33WO3) heterojunction using a solvothermal method. The photocatalytic activities of the prepared samples were examined for the photodegradation of colorless antibiotics, namely tetracycline, enrofloxacin, and ciprofloxacin, as well as cationic and anionic dyes, such as methyl orange, rhodamine B, neutral red, and methylene blue, under full-spectrum solar light. We have purposely selected different kinds of wastewater pollutants of colorless antibiotics and cationic and anionic organic dyes to investigate the potential application of this heterojunction toward different groups of water pollutants. The results revealed that the g-C3N4@Cs0.33WO3 heterojunction showed an outstanding photocatalytic activity toward all the pollutants with concentrations of 20 ppm each at pH 3 by photocatalytically removing 97% of tetracycline within 3 h, 98% of enrofloxacin within 2 h, 97% of ciprofloxacin within 2.25 h, 98% of methylene blue in 1 h, 99% of rhodamine B within 2 h, 99% of neutral red in 1.25 h, and 95% of methyl orange in 2 h. These findings indicate that the developed photocatalyst possesses excellent photocatalytic properties toward seven different water pollutants that make it a universal photocatalyst. The developed g-C3N4@Cs0.33WO3 oxide heterojunction also presented a photocatalytic performance better than those of reported solar light active photocatalysts for photodegradation of rhodamine B and tetracycline. The efficient photocatalytic performance of the heterojunction can be ascribed to its extended light-absorbing ability, effective charge separation and fast charge transfer properties, and a high surface area. Moreover, an active species detection experiment also confirmed that superoxide radicals, hydroxyl radicals, and holes played significant roles in the photocatalysis of the organic dyes and tetracycline.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Photoelectrochemical and Optical Analysesmentioning

confidence: 99%

See 1 more Smart Citation

Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Tessema

Motora

2022

ACS Omega

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“…On the one hand, BC could be used as effective electron transfer channels and acceptors to improve the separation of photogenerated electron–hole pairs. On the other hand, the large surface area of biochar can enrich pollutants while providing sufficient catalytic sites for photocatalytic degradation [ 33 ]. Li and Lin [ 34 ] successfully prepared the biochar-supported K-doped g-C 3 N 4 composites, which displayed an enhanced optical absorption in the visible region and a wider photocatalytic application scope compared to pure g-C 3 N 4 .…”

Section: Introductionmentioning

confidence: 99%

Study on the Enhanced Remediation of Petroleum-Contaminated Soil by Biochar/g-C3N4 Composites

Lin

Yang

Shang

et al. 2022

IJERPH

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This work developed an environmentally-friendly soil remediation method based on BC and g-C3N4, and demonstrated the technical feasibility of remediating petroleum-contaminated soil with biochar/graphite carbon nitride (BC/g-C3N4). The synthesis of BC/g-C3N4 composites was used for the removal of TPH in soil via adsorption and photocatalysis. BC, g-C3N4, and BC/g-C3N4 have been characterized by scanning electron microscopy (SEM), Brunauer–Emmett–Teller surface area analyzer (BET), FT-IR, and X-ray diffraction (XRD). BC/g-C3N4 facilitates the degradation due to reducing recombination and better electron-hole pair separation. BC, g-C3N4, and BC/g-C3N4 were tested for their adsorption and photocatalytic degradation capacities. Excellent and promising results are brought out by an apparent synergism between adsorption and photocatalysis. The optimum doping ratio of 1:3 between BC and g-C3N4 was determined by single-factor experiments. The removal rate of total petroleum hydrocarbons (TPH) by BC/g-C3N4 reached 54.5% by adding BC/g-C3N4 at a dosing rate of 0.08 g/g in a neutral soil with 10% moisture content, which was 2.12 and 1.95 times of BC and g-C3N4, respectively. The removal process of TPH by BC/g-C3N4 conformed to the pseudo-second-order kinetic model. In addition, the removal rates of different petroleum components in soil were analyzed in terms of gas chromatography–mass spectrometry (GC-MS), and the removal rates of nC13-nC35 were above 90% with the contaminated soil treated by BC/g-C3N4. The radical scavenger experiments indicated that superoxide radical played the major role in the photocatalytic degradation of TPH. This work definitely demonstrates that the BC/g-C3N4 composites have great potential for application in the remediation of organic pollutant contaminated soil.

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“…Photocatalysis is considered as an alternative and promising strategy for degradation and mineralization of antibiotics due to its low cost, high efficiency, mild reaction condition, and no secondary pollution [9][10][11]. A variety of semiconductors have been used for antibiotic degradation [12][13][14][15][16][17]. However, poor adsorptive ability, low quantum yield, and rapid recombination of photogenerated carriers restrict the real applications of photocatalysis in the removal of CTC from wastewater [18].…”

Section: Introductionmentioning

confidence: 99%

Spindle-like MIL101(Fe) decorated with Bi₂O₃ nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

Hao¹,

Chen²,

Bian³

et al. 2022

Beilstein J. Nanotechnol.

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Improving the photocatalytic performance of metal–organic frameworks (MOFs) is an important way to expand its potential applications. In this work, zero-dimensional (0D) Bi2O3 nanoparticles were anchored to the surface of tridimensional (3D) MIL101(Fe) by a facile solvothermal method to obtain a novel 0D/3D heterojunction Bi2O3/MIL101(Fe) (BOM). The morphology and optical properties of the as-prepared Bi2O3/MIL101(Fe) composite were characterized. The photocatalytic activity of the synthesized samples was evaluated by degrading chlortetracycline (CTC) under visible-light irradiation. The obtained BOM-20 composite (20 wt % Bi2O3/MIL101(Fe)) exhibits the highest photocatalytic activity with CTC degradation efficiency of 88.2% within 120 min. The degradation rate constant of BOM-20 toward CTC is 0.01348 min−1, which is 5.9 and 4.3 times higher than that of pristine Bi2O3 and MIL101(Fe), respectively. The enhanced photocatalytic activity is attributed to the formation of a Z-scheme heterojunction between Bi2O3 and MIL101(Fe), which is conducive to the rapid separation of photogenerated carriers and the enhancement of photogenerated electron and hole redox capacity. The intermediate products were analyzed by liquid chromatography–mass spectrometry (LC–MS), and a possible photocatalytic degradation path of CTC was proposed. This work provides a new perspective for the preparation of efficient MOF-based photocatalysts.

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π-π stacking derived from graphene-like biochar/g-C3N4 with tunable band structure for photocatalytic antibiotics degradation via peroxymonosulfate activation

Cited by 146 publications

References 67 publications

Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Study on the Enhanced Remediation of Petroleum-Contaminated Soil by Biochar/g-C3N4 Composites

Spindle-like MIL101(Fe) decorated with Bi₂O₃ nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

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π-π stacking derived from graphene-like biochar/g-C3N4 with tunable band structure for photocatalytic antibiotics degradation via peroxymonosulfate activation

Cited by 146 publications

References 67 publications

Highly Efficient Solar Light Driven g-C3N4@Cs0.33WO3 Heterojunction for the Photodegradation of Colorless Antibiotics

Highly Efficient Solar Light Driven g-C3N4@Cs0.33WO3 Heterojunction for the Photodegradation of Colorless Antibiotics

Study on the Enhanced Remediation of Petroleum-Contaminated Soil by Biochar/g-C3N4 Composites

Spindle-like MIL101(Fe) decorated with Bi2O3 nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

Contact Info

Product

Resources

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Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Spindle-like MIL101(Fe) decorated with Bi₂O₃ nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation