South Central University for Nationalities

About: South Central University for Nationalities is a education organization based out in Wuhan, China. It is known for research contribution in the topics: Catalysis & Photocatalysis. The organization has 5415 authors who have published 5030 publications receiving 81909 citations. The organization is also known as: Zhōngnán mínzú Dàxué.

Graphitic Carbon Nitride: Synthesis, Properties, and Applications in Catalysis

Abstract: Graphitic carbon nitride, g-C3N4, is a polymeric material consisting of C, N, and some impurity H, connected via tris-triazine-based patterns. Compared with the majority of carbon materials, it has electron-rich properties, basic surface functionalities and H-bonding motifs due to the presence of N and H atoms. It is thus regarded as a potential candidate to complement carbon in material applications. In this review, a brief introduction to g-C3N4 is given, the methods used for synthesizing this material with different textural structures and surface morphologies are described, and its physicochemical properties are referred. In addition, four aspects of the applications of g-C3N4 in catalysis are discussed: (1) as a base metal-free catalyst for NO decomposition, (2) as a reference material in differentiating oxygen activation sites for oxidation reactions over supported catalysts, (3) as a functional material to synthesize nanosized metal particles, and (4) as a metal-free catalyst for photocatalysis. Th...

CdS/Graphene Nanocomposite Photocatalysts

Abstract: Heterogeneous photocatalysis using semiconductors and renewable solar energy has been regarded as one of the most promising processes to alleviate, and even solve, both the world crises of energy supply and environmental pollution. In the past few years, many encouraging achievements have been made in the research area of graphene-based semiconductor photocatalysts. Among them, CdS/graphene nanocomposites have attracted extensive attention as an important kind of photocatalyst in chemical and material science, due to its superior photocatalytic activity and photostability under visible-light irradiation. The aim here is to address the enhancement mechanism of the photocatalytic performance of CdS/graphene composite photocatalysts, and systematically summarize recent progress regarding the design and synthesis of CdS/graphene nanocomposites. These nanocomposites are promising for a great diversity of applications in visible-light photocatalytic fields, including artificial photosynthetic systems (photocatalytic hydrogen production and CO2 reduction), environmental remediation, and organic photosynthesis. Special attention is given to the photocatalytic hydrogen production and pollutant photodegradation over CdS/graphene nanocomposite photocatalysts. Furthermore, perspectives on CdS/graphene-based materials are discussed, including the various remaining challenges for large-scale applications, identifying prospective areas for related research in this field.

Perovskite Oxides: Preparation, Characterizations, and Applications in Heterogeneous Catalysis

Abstract: Perovskite oxides with formula ABO3 or A2BO4 are a very important class of functional materials that exhibit a range of stoichiometries and crystal structures. Because of the structural features, they could accommodate around 90% of the metallic natural elements of the Periodic Table that stand solely or partially at the A and/or B positions without destroying the matrix structure, offering a way of correlating solid state chemistry to catalytic properties. Moreover, their high thermal and hydrothermal stability enable them suitable catalytic materials either for gas or solid reactions carried out at high temperatures, or liquid reactions carried out at low temperatures. In this review, we addressed the preparation, characterization, and application of perovskite oxides in heterogeneous catalysis. Preparation is an important issue in catalysis by which materials with desired textural structure and physicochemical property could be achieved; characterization is the way to explore and understand the textura...

Sulfate radicals induced degradation of tetrabromobisphenol A with nanoscaled magnetic CuFe2O4 as a heterogeneous catalyst of peroxymonosulfate

Abstract: CuFe 2 O 4 magnetic nanoparticles (MNPs) were prepared by sol–gel combustion method with copper and iron nitrates as metal precursors and citrate acid as a complex agent. The obtained CuFe 2 O 4 MNPs were characterized by scanning electron microscopy, X-ray diffractometry, Fourier transform infrared spectroscopy, Fourier transform Raman spectroscopy and X-ray photoelectron spectroscopy. It was found that CuFe 2 O 4 MNPs could effectively catalyze peroxymonosulfate (PMS) to generate sulfate radicals (SO 4 − ) to degrade tetrabromobisphenol A (TBBPA). The added TBBPA (10 mg L −1 ) was almost completely removed (with a removal of 99%) in 30 min by using 0.1 g L −1 CuFe 2 O 4 MNPs and 0.2 mmol L −1 PMS. With higher addition of PMS (1.5 mmol L −1 ), the degradation yielded a TOC removal of 56% and a TBBPA debromination ratio of 67%. The effect of catalyst calcination temperature, catalyst load, PMS concentration and reaction temperature was investigated on the catalytic activity of CuFe 2 O 4 MNPs. The highly catalytic activity of CuFe 2 O 4 MNPs possibly involved the activation of PMS by both Cu(II) and Fe(III) in CuFe 2 O 4 MNPs. Based on intermediate detections, the degradation pathway of TBBPA in the CuFe 2 O 4 MNPs/PMS system was proposed.

Nitrogen-Doped Reduced Graphene Oxide as a Bifunctional Material for Removing Bisphenols: Synergistic Effect between Adsorption and Catalysis.

Abstract: Nitrogen modified reduced graphene oxide (N-RGO) was prepared by a hydrothermal method. The nitrogen modification enhanced its adsorption and catalysis ability. For an initial bisphenol concentration of 0.385 mmol L–1, the adsorption capacity of N-RGO was evaluated as 1.56 and 1.43 mmol g–1 for bisphenol A (BPA) and 1.43 mmol g–1 for bisphenol F (BPF), respectively, both of which were about 1.75 times that (0.90 and 0.84 mmol g–1) on N-free RGO. N-RGO could activate persulfate, producing strong oxidizing sulfate radicals. The apparent degradation rate constant of BPA on N-RGO was 0.71 min–1, being about 700 times that (0.001 min–1) on N-free RGO. In mixtures of various phenols, the degradation rate constant of each phenol was linearly increased with its adsorption capacity. A simultaneous use of N-RGO and persulfate yielded fast and efficient removal of bisphenols. The use of N-RGO (120 mg L–1) and persulfate (0.6 mmol L–1) almost completely removed the added bisphenols (0.385 mmol L–1) at pH 6.6 within 1...