Preparation of TiO2-graphitized carbon composite photocatalyst and their degradation properties for tetracycline antibiotics

Zhang, Xueqi; Chen, Hanyu; Liu, Shaoqin; Zhang, Baozhong; Zhu, Huina; Chen, Hongxia; Wen, Bo; Chen, Lefei

doi:10.1016/j.molstruc.2022.133897

Cited by 24 publications

(6 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, under visible light irradiation, the K value of TiO2-100 can reach 0.217 min −1 , which was 12, 11, and 43 times that of TiO2-90 (0.016 min −1 ), TiO2-110 (0.018 min −1 ) and P25 (0.005 min −1 ), respectively. This indicated that the synthesized TiO2-100 had a stronger degradation ability than P25, and it was comparable to the degradation rate constants of TC by the TiO2-graphitized carbon composite prepared by Zhang [62]. Table S3 summarizes some of the studies on the degradation of TC by TiO2 catalysts [32,53,61,[63][64][65][66][67][68].…”

Section: Photocatalytic Degradation and Mechanisms Of Tcmentioning

confidence: 69%

See 1 more Smart Citation

Facile Synthesis to Porous TiO2 Nanostructures at Low Temperature for Efficient Visible-Light Degradation of Tetracycline

Lian,

Qin,

Liu

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

In this study, nanoporous TiO2 with hierarchical micro/nanostructures was synthesized on a large scale by a facile one-step solvothermal method at a low temperature. A series of characterizations was performed and carried out on the as-prepared photocatalysts, which were applied to the degradation of the antibiotic tetracycline (TC). The results demonstrated that nanoporous TiO2 obtained at a solvothermal temperature of 100 °C had a spherical morphology with high crystallinity and a relatively large specific surface area, composed of a large number of nanospheres. The nanoporous TiO2 with hierarchical micro/nanostructures exhibited excellent photocatalytic degradation activity for TC under simulated sunlight. The degradation rate was close to 100% after 30 min of UV light irradiation, and reached 79% only after 60 min of visible light irradiation, which was much better than the photodegradation performance of commercial TiO2 (only 29%). Moreover, the possible intermediates formed during the photocatalytic degradation of TC were explored by the density functional theory calculations and HPLC-MS spectra. Furthermore, two possible degradation routes were proposed, which provided experimental and theoretical support for the photocatalytic degradation of TC. In this study, we provide a new approach for the hierarchical micro/nanostructure of nanoporous TiO2, which can be applied in industrial manufacturing fields.

show abstract

Section: Photocatalytic Degradation and Mechanisms Of Tcmentioning

confidence: 69%

“…Finally, it generated P9 ( m / z = 60) and P10 ( m / z = 118) after decarboxylation. These intermediates will eventually be mineralized into small molecule harmless products such as CO 2 and H 2 O [ 27 , 43 , 62 ].…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis to Porous TiO2 Nanostructures at Low Temperature for Efficient Visible-Light Degradation of Tetracycline

Lian,

Qin,

Liu

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…Furthermore, their bandgap values were estimated using the Kubelka-Munk formula. These are plotted in Figure 8b with the x-axis showing E = hν = 1240/λ, where λ is the absorption wavelength, and (αhν) 2 on the y-axis [44][45][46]. As shown, the bandgap values of PCT-x-550 samples gradually increase as their bio-carbon content decreases.…”

Section: Photovoltaic Performance Analysis Of Prepared Samplesmentioning

confidence: 85%

Waste Biomass-Mediated Synthesis of TiO2/P, K-Containing Grapefruit Peel Biochar Composites with Enhanced Photocatalytic Activity

Wu,

Liu,

Bai

et al. 2024

Molecules

View full text Add to dashboard Cite

In this study, TiO2/P, K-containing grapefruit peel biochar (TiO2/P, K-PC) composites were synthesized in situ biomimetically using grapefruit peel as the bio-template and carbon source and tetrabutyl titanate as the titanium source. This was achieved using the two-step rotary impregnation–calcination method. Adjusting the calcination temperature of the sample in an air atmosphere could regulate the mass ratio of TiO2 to carbon. The prepared samples were subjected to an analysis of their compositions, structures, morphologies, and properties. It demonstrated that the prepared samples were complexes of anatase TiO2 and P, K-containing carbon, with the presence of graphitic carbon. They possessed a unique morphological structure with abundant pores and a large surface area. The grapefruit peel powder played a crucial role in the induction and assembly of TiO2/P, K-PC composites. The sample PCT-400-550 had the best photocatalytic activity, with the degradation rate of RhB, MO, and MB dye solutions reaching more than 99% within 30 min, with satisfactory cyclic stability. The outstanding photocatalytic activity can be credited to its unique morphology and the efficient collaboration between TiO2 and P, K-containing biochar.

show abstract

“…Th result indicated that the titanium element in the composite mainly existed in the form Ti 4+ [28]. Also, the binding energies of Ti 2p 1/2 and Ti 2p 3/2 were higher than the correspon ing ones in pure TiO2 (458.5 eV and 464.3 eV, respectively), which was due to the fact th the C atoms in the composite affected the electron cloud density around the Ti and atoms, thereby forming Ti-O-C bonds [19].…”

Section: Xps Analysesmentioning

confidence: 93%

“…TiO 2 is a photocatalyst that is most widely studied for water purification [17,18], which has here been used due to its low cost, high stability, minimum photo-corrosion, high photo-activity, and low toxicity. Zhang et al [19] found that TiO 2 can be removed by approximately 55% of TC in an aqueous solution. However, TiO 2 also has some disadvantages, such as small surface area, low light utilization, quick recombination of electron-hole pairs, easy agglomeration, low reactivity for low concentrations of contaminants, and difficulties in recovering in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

TiO2/p-BC Composite Photocatalyst for Efficient Removal of Tetracycline from Aqueous Solutions under Simulated Sunlight

Liu,

Zheng,

Gao

et al. 2024

Catalysts

View full text Add to dashboard Cite

Pollution caused by antibiotics has brought significant challenges to the ecological environment. To improve the efficiency of the removal of tetracycline (TC) from aqueous solutions, a composite material consisting of TiO2 and phosphoric acid-treated peanut shell biochar (p-BC) has been successfully synthesized in the present study by the sol-gel method. In addition, the composite material was characterized using various techniques, including scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) spectroscopy, X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, and ultraviolet–visible diffuse reflectance spectroscopy (UV-vis DRS). The XPS and FTIR analyses revealed the formation of a new Ti–O–C bond, while the XRD analysis confirmed the presence of TiO2 (with an anatase phase) in the composite material. Also, the PL analyses showed a notable decrease in the recombination efficiency of electrons and holes, which was due to the formation of a composite. This was further supported by the UV-vis DRS analyses, which revealed a decrease in bandgap (to 2.73 eV) of the composite material and led to enhanced light utilization and improved photocatalytic activity. Furthermore, the effects of pH, composite dosage, and initial concentration on the removal of TC were thoroughly examined, which resulted in a maximum removal efficiency of 95.3% under optimal conditions. Additionally, five consecutive cycle tests demonstrated an exceptional reusability and stability of the composite material. As a result of the experiments, the active species verified that ·O2− played a key role in the photodegradation of TC. Four possible degradation pathways of TC were then proposed. As a general conclusion, the TiO2/p–BC composite can be used as an efficient photocatalyst in the removal of TC from aqueous solutions.

show abstract

Preparation of TiO2-graphitized carbon composite photocatalyst and their degradation properties for tetracycline antibiotics

Cited by 24 publications

References 38 publications

Facile Synthesis to Porous TiO2 Nanostructures at Low Temperature for Efficient Visible-Light Degradation of Tetracycline

Facile Synthesis to Porous TiO2 Nanostructures at Low Temperature for Efficient Visible-Light Degradation of Tetracycline

Waste Biomass-Mediated Synthesis of TiO2/P, K-Containing Grapefruit Peel Biochar Composites with Enhanced Photocatalytic Activity

TiO2/p-BC Composite Photocatalyst for Efficient Removal of Tetracycline from Aqueous Solutions under Simulated Sunlight

Contact Info

Product

Resources

About