Photocatalytic reduction performance and mechanisms of Cr(VI) by illite-g-C3N4 under visible light

Sun, Huimin; Wang, Le; Zhang, Ying; Wang, Tiecheng; Yin, Xianqiang

doi:10.1016/j.apsusc.2022.155226

Cited by 17 publications

(4 citation statements)

References 55 publications

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“…29 Additionally, the diffraction peaks of Ti(I/S) at 20.581, 26.681, 50.11, and 60.11 correspond to the quartz phase, which belonged to I/S. 30 Carbon materials were amorphous, and it could be seen that the Ti(I/S) diffraction peak still remained after C modification, which indicated that the addition of C did not change the crystal phase of Ti(I/S). With the increased content of C, the diffraction peaks became weaker, meaning that C produced the effect of corrosion and thinning on the materials.…”

Section: Resultsmentioning

confidence: 99%

Carbon modified Ti(I/S) composites and their photocatalytic degradation of rhodamine B

Yang¹,

Wang²,

Xie³

et al. 2023

New J. Chem.

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Section: Resultsmentioning

confidence: 99%

Carbon modified Ti(I/S) composites and their photocatalytic degradation of rhodamine B

Yang¹,

Wang²,

Xie³

et al. 2023

New J. Chem.

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“…Besides, illite can effectively adsorb graphene oxide in water as an adsorbent due to its large speci c surface area in order to prevent water pollution caused by graphene oxide (Li et al, 2022). The ilmenite-modi ed g-C 3 N 4 (IL-CN) material exhibited superior catalytic activity for Cr (VI) reduction under visible light irradiation due to the carbonoxygen vacancies and defects in IL-CN, and the modi ed IL-CN material exhibited larger speci c surface area and porosity, as well as stronger electron-hole pair separation (Sun et al, 2022). Expanded layered kaolinite enhances the elongation, electrolyte absorption and ionic conductivity of polyacrylamide hydrogels (Ding et al, 2022) and the combination of multilayer nano coatings lled with kaolin can reduce the ammability of polyurethane (Liu et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

A simple and efficient method for loess separation and composition analysis

Zhao,

Huang,

Zhou

et al. 2023

Preprint

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Loess is a widely existing cheap natural inorganic material, due to its complex composition and insufficient understanding of its efficient utilization and repeated utilization, it has not been widely used. Therefore, in this article, a simple method with buoyancy and gravity sedimentation to separate loess into large, medium and small particles. Besides, the main components of different particle size loess particles were provided. The separated particles were characterized by Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), Brunauer-EmmettTeller (BET), Thermal gravity (TG), X-ray diffraction (XRD), X-ray fluorescence spectrum (XRF), and X-ray photoelectron spectroscopy (XPS). It was found that the mineral compositions in large, medium and small loess particles vary with particle size. The large loess particles contains more aluminosilicate, medium loess particles contains both aluminosilicate and clay. It can play different roles according to the content of different particle sizes of loess particles, and realize the efficient use of loess particles. The main component of small loess particles is clay. Clay particles have a wide range of applications and can be used for adsorption as well as catalytic degradation of pollutants as a catalyst carrier. Therefore, it is necessary to separate loess by a simple method to improve its utilization rate.

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“…In the composite of g-C 3 N 4 /ZnIn 2 S 4 , the improved charge separation was the possible reason for the increased efficiency [23]. The same explanation, along with the larger specific surface area, was the interpretation of the higher efficacy of the illite-g-C 3 N 4 catalyst [24]. The combination of g-C 3 N 4 with Cu 2 O also led the increased reduction and, at the same time, the oxidation potentials utilized for reductive conversion of Cr(VI) and oxidative degradation of tetracycline [25].…”

Section: Introductionmentioning

confidence: 86%

Effect of Ruthenium Modification of g-C3N4 in the Visible-Light-Driven Photocatalytic Reduction of Cr(VI)

et al. 2023

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Graphitic carbon nitride (g-C3N4) is a promising heterogeneous photocatalyst in the visible range. It can be used, among others, for reductive conversion of the toxic hexavalent chromium occurring in various wastewaters. Its photocatalytic efficiency, however, has to be improved, which can be realized by modification with different dopants or co-catalysts forming heterojunctions. In our work, ruthenium-modified g-C3N4 has been prepared by ultrasonic impregnation of the pristine g-C3N4, which was synthesized from thiourea. The morphology, microstructure, and optical properties of the photocatalysts were characterized by XRD, SEM, FT-IR, TEM, XPS, and DRS. Their compositions were analyzed by EDS and XPS measurements, indicating 0.5% and 1.4% Ru, due to the different penetrating depths. XPS study showed mainly +2 for the oxidation state of Ru. DRS analysis indicated a slight change in both the CB (from −1.14 to −1.22 eV) and the VB (from 1.49 to 1.56 eV) energies of Ru/g-C3N4, compared to those of g-C3N4. The photocatalytic Cr(VI) reduction efficacy increased from 50.1 to 96.8%. Low pH (=2) was preferred for the photocatalytic Cr(VI) reduction due to the favorable surface charge and E(Cr(VI)/Cr(III)) redox potential. Ru modification proved to be promising for improving the photocatalytic performance of g-C3N4.

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Photocatalytic reduction performance and mechanisms of Cr(VI) by illite-g-C3N4 under visible light

Cited by 17 publications

References 55 publications

Carbon modified Ti(I/S) composites and their photocatalytic degradation of rhodamine B

Carbon modified Ti(I/S) composites and their photocatalytic degradation of rhodamine B

A simple and efficient method for loess separation and composition analysis

Effect of Ruthenium Modification of g-C3N4 in the Visible-Light-Driven Photocatalytic Reduction of Cr(VI)

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