Direct conversion of urea into graphitic carbon nitride over mesoporous TiO<sub>2</sub>spheres under mild condition

Zou, Xiaoxin; Li, Guodong; Wang, Yuning; Zhao, Jun; Yan, Chang; Guo, Mingyi; Li, Lu; Chen, Jie‐Sheng

doi:10.1039/c0cc03530k

Cited by 151 publications

(72 citation statements)

References 36 publications

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“…The N 1s spectrum of such nanoparticles (Fig. 3d) exhibits three peaks at 398.5, 399.4, and 400.6 eV, which are associated with the C-N-C, N-(C) 3 , and N-H groups, respectively [33]. The XPS spectrum data are consistent with that of CNDs reported by our previous work [22] and prove the existence of CNDs in the product.…”

Section: Methodssupporting

confidence: 87%

Novel synthesis of Au nanoparticles using fluorescent carbon nitride dots as photocatalyst

Qin

Chang

et al. 2012

Gold Bull

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Section: Methodssupporting

confidence: 87%

Novel synthesis of Au nanoparticles using fluorescent carbon nitride dots as photocatalyst

Qin

Chang

et al. 2012

Gold Bull

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“…(2) calcinating commercial available TiO 2 or presynthesized TiO 2 with precursors of g-C 3 N4 [34][35][36] ; (3) in situ growth of TiO 2 on pre-synthesized g-C 3 N 4 30, [37][38][39] . The first method by using physical mixing is easy to operate and beneficial for scale up, however, uniform mixing and close contact between the two components may not be quite easy to achieve.…”

Section: Introductionmentioning

confidence: 99%

In situ growth of TiO₂ nanocrystals on g-C₃N₄ for enhanced photocatalytic performance

Zhou

Wang

et al. 2015

Phys. Chem. Chem. Phys.

128

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Well dispersed TiO2 nanocrystals with (001) facets were successfully grown in situ on g-C3N4 through a facial solvothermal method. The resultant TiO2/g-C3N4 composites exhibit remarkably higher efficiency for photocatalytic degradation of phenol as compared to pure catalysts (g-C3N4 or TiO2) or mechanically mixed TiO2/g-C3N4. The optimal composite with 11.2 wt% TiO2 showed the highest degradation rate constant, which is 2.8 times that of pure g-C3N4, 2.2 times that of pure TiO2, and 1.4 times that of mechanically mixed TiO2/g-C3N4. The enhanced photocatalytic activity is mainly attributed to the effective charge separation derived from two aspects: (1) well matched energy levels between TiO2 and g-C3N4 and (2) a uniform and close contact between TiO2 and g-C3N4 that resulted from the in situ growth of highly dispersed TiO2 nanocrystals. The TiO2/g-C3N4 hybrid material prepared in this study is expected to provide a good foundation for the further design and synthesis of advanced TiO2/g-C3N4-based functional materials, and the in situ growth method developed is hopeful to provide a new strategy for the synthesis of other semiconductor-modified g-C3N4 materials.

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“…[12][13][14][15][16][17][18][19] Moreover, transition metal oxide systems having redox properties are also used for the conversion of organic constituent sustainable and renewable chemicals. [20][21][22] The physicochemical properties of transition metal oxides are considered to be a potential factor in carrying out discriminating organic reactions. Meanwhile, the rate-determining step on the surface of such novel materials would be evaluated via the mass of energetic sites in addition to the BraunerEmmett-Teller (BET) surface area with notable improvements in catalytic activity related to increases in BET surface area that comes from smaller particle diameters.…”

Section: Introductionmentioning

confidence: 99%

Cytotoxicity and physicochemical characterization of iron–manganese-doped sulfated zirconia nanoparticles

Al-Fahdawi¹,

Abdullah²,

Al‐Qubaisi³

et al. 2015

IJN

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Iron–manganese-doped sulfated zirconia nanoparticles with both Lewis and Brønsted acidic sites were prepared by a hydrothermal impregnation method followed by calcination at 650°C for 5 hours, and their cytotoxicity properties against cancer cell lines were determined. The characterization was carried out using X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, Brauner–Emmett–Teller (BET) surface area measurements, X-ray fluorescence, X-ray photoelectron spectroscopy, zeta size potential, and transmission electron microscopy (TEM). The cytotoxicity of iron–manganese-doped sulfated zirconia nanoparticles was determined using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays against three human cancer cell lines (breast cancer MDA-MB231 cells, colon carcinoma HT29 cells, and hepatocellular carcinoma HepG2 cells) and two normal human cell lines (normal hepatocyte Chang cells and normal human umbilical vein endothelial cells [HUVECs]). The results suggest for the first time that iron–manganese-doped sulfated zirconia nanoparticles are cytotoxic to MDA-MB231 and HepG2 cancer cells but have less toxicity to HT29 and normal cells at concentrations from 7.8 μg/mL to 500 μg/mL. The morphology of the treated cells was also studied, and the results supported those from the cytotoxicity study in that the nanoparticle-treated HepG2 and MDA-MB231 cells had more dramatic changes in cell morphology than the HT29 cells. In this manner, this study provides the first evidence that iron–manganese-doped sulfated zirconia nanoparticles should be further studied for a wide range of cancer applications without detrimental effects on healthy cell functions.

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Direct conversion of urea into graphitic carbon nitride over mesoporous TiO₂spheres under mild condition

Abstract: Mesoporous TiO(2) spheres with a large surface area and rich surface hydroxyl groups have been prepared through a light-driven synthetic strategy, and the as-prepared mesoporous material is able to convert urea to carbon nitride efficiently under a mild condition.

Cited by 151 publications

References 36 publications

Novel synthesis of Au nanoparticles using fluorescent carbon nitride dots as photocatalyst

Novel synthesis of Au nanoparticles using fluorescent carbon nitride dots as photocatalyst

In situ growth of TiO₂ nanocrystals on g-C₃N₄ for enhanced photocatalytic performance

Cytotoxicity and physicochemical characterization of iron–manganese-doped sulfated zirconia nanoparticles

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Direct conversion of urea into graphitic carbon nitride over mesoporous TiO2spheres under mild condition

Abstract: Mesoporous TiO(2) spheres with a large surface area and rich surface hydroxyl groups have been prepared through a light-driven synthetic strategy, and the as-prepared mesoporous material is able to convert urea to carbon nitride efficiently under a mild condition.

Cited by 151 publications

References 36 publications

Novel synthesis of Au nanoparticles using fluorescent carbon nitride dots as photocatalyst

Novel synthesis of Au nanoparticles using fluorescent carbon nitride dots as photocatalyst

In situ growth of TiO2 nanocrystals on g-C3N4 for enhanced photocatalytic performance

Cytotoxicity and physicochemical characterization of iron&ndash;manganese-doped sulfated zirconia nanoparticles

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Product

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Direct conversion of urea into graphitic carbon nitride over mesoporous TiO₂spheres under mild condition

In situ growth of TiO₂ nanocrystals on g-C₃N₄ for enhanced photocatalytic performance

Cytotoxicity and physicochemical characterization of iron–manganese-doped sulfated zirconia nanoparticles