Catalysts
·
2025
·Vol. 15
·期 3
·
IF 4
Yafeng Huang,Rui Pang,Shanshan Sun,Xiufang Chen,Fengtao Chen,Wangyang Lu
The peroxymonosulfate (PMS)-assisted photocatalytic process has shown considerable potential for the treatment of wastewater. g-C3N4-based catalysts are widely applied to eliminate organic pollutants in wastewater. However, the bulk catalyst prepared by dicyandiamide has the drawback of a low surface area (10 m2/g), while the porous catalyst prepared by urea suffers from a low catalyst yield based on urea (3.5%). To address these challenges, a porous V-doped carbon nitride (V/CN) was designed through one-step thermal polymerization using urea and dicyandiamide as the carbon nitride precursor and NH4VO3as the V precursor. When the ratio of urea to dicyandiamide was 10:1, the yield of V/CN was improved, while it maintained a rich porous structure with a specific surface area (64.6 m2/g). The synergetic effect of V doping and nanosheet and hollow tubular structures facilitated the separation of photogenerated carriers, leading to boosting the photocatalytic activity of g-C3N4in the PMS system. V/CN(10:1) could completely degrade CBZ within 20 min, exhibiting an equivalent catalytic efficiency comparable to that of V/CN prepared by urea (V/UCN), while markedly surpassing both V/DCN and CN prepared by urea alone (UCN) in performance. This study presents an economical and effective approach for the photocatalytic degradation of pharmaceutical pollutants in aquatic environments.
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DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 5
·055504
·
IF 1.62
Fengpo Yan,Hao Zhang,Yu Zhang,Fugui Yang
0.3 mol% platinum loaded g-C3N4 sample was prepared by photoreduction method to study the long-term stability of photocatalysts. For the first time, we have discovered the oriented attachment (OA) mechanism growth of Pt nanoparticles on g-C3N4 solid surface, which is completely different from Ostwald ripening (OR) or particle migration and coalescence (PMC) that previously reported. The Pt nanoparticles perform Brownian motion on the surface of g-C3N4 support under the collision of liquid molecules, then two or more nanoparticles attach together via the crystallographic orientation to construct larger ones. Al2O3 film prepared by atomic layer depositon was introduced to inhibit the Brownian motion of Pt nanoparticles. It is found that as the increase of the Al2O3 growth cycles, the photocatalytic hydrogen production of Pt/g-C3N4 coated by Al2O3 increase from 1.14 mmolg−1h−1 to 2.08 mmolg−1h−1 and then decrease to 1.4 mmolg−1h−1, and the apparent quantum efficiency (QE) also increase from 1.2% to 2.1% and then decrease to 1.4%. Meanwhile, the long-term stability of photocatalyst always increases. This work has revealed new pathway of photocatalytic nanoparticle growth on solid surface and proposed the method to prevent it.
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高影响因子
Discover Food
·
2024
·Vol. 4
·期 1
·1-12
·
IF 0
Din Ghulam Mueen Ud,Rubab Qandeel,Hussain Ashiq,Yaqub Shazia,Zulfiqar Nabeela,Bibi Barira,Ayesha Amina,Firdous Nida,Asif Afifa,Elkhedir Abdeen Elsiddig
Lotus ( Nelumbo nucifera, G.) is a perennial aquatic plant, which is utilized for a variety of therapeutic and food applications. Muffins are a kind of baking product that is typically consumed for breakfast or as a snack. Currently, many baked goods in the market use fat replacers to lower the overall fat content, while conserving consumer approval. The study's objectives were to produce low-fat muffins and to characterize the types of quality changes that occurred in the muffins. Lotus rhizome was sliced, dried and converted into powder, which used as fat substitute in muffins, at 0, 5, 10, 15 and 20% replacement levels, with names as M 0 , M 1 , M 2 , M 3 and M 4 , respectively. Composite flours having these proportions of lotus Rhizome Powder (LRP) were analyzed for proximate and rheological parameters. Increasing levels of LRP caused increased water absorption and dough development time of the composite flours. Proximate analyses of muffins showed highest value of moisture (25.05%), ash (2.43%), fiber (0.99%), protein (11.89%) and NFE (58.45%) in M 4 . Whereas, fat content and energy value were significantly reduced in M 4 , as highest fat was found to be in M 0 (36.65%) and highest calories in M 0 (576.5 kcal), which were significantly reduced to 26.24% and 514.5 kcal, respectively in M 4 . High yeast and mold count was of M 0 at first day as 98 CFU/g, which was increased to 129 CFU/g at day 7, whereas M 4 presented this count to be 44 CFU/g at day one, which was increased to 70.33 CFU/g at day 7. Texture analysis showed softest texture of M 4 as firmness value was 1887 g, which was significantly high in M 0 as 2285 g. The research revealed that M 3 best performed out of all treatments as 15% replacement of fat with LRP significantly improved the rheological properties of the flour, ash and fiber content were high, whereas fat contents were significantly low in these muffins. Textural and sensory analysis also supported the M 3 due to softer texture and significantly high color, appearance, flavor, and overall acceptability scores. From the results of this study, it could be concluded that a 15% replacement of shortenings with LRP could be considered as optimum for developing good quality baked muffins. Graphical
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RSC Advances
·
2021
·Vol. 11
·期 53
·33373-33379
·
IF 3.361
Lejie Zhu,Jianmin Luo,Guohui Dong,Yun Lu,Yinlong Lai,Jun Liu,Guanmei Chen,Yi Zhang
As a kind of metal-free organic semiconductor photocatalyst, g-C3N4 has been widely explored for use in photocatalysis. However, the low quantum yield, small absorption range, and poor conductivity limit its large-scale application. Introducing another kind of semiconductor, particularly an oxide semiconductor, can result in some unexpected properties, such as an improved change transfer, enhanced light absorption, and better conductivity. In this work, CuO/g-C3N4 is successfully prepared through an impregnation and post-calcination method. A series of measurements support the formation of an organic-inorganic hybrid p–n heterojunction at the CuO (p-type) and g-C3N4 (n-type) interface. Furthermore, the photoactivity of the composite is evaluated via photocatalytic NO removal and the visible degradation of rhodamine B (RhB). Results show that the photocatalytic properties of CuO/g-C3N4 are almost twice as high as those of g-C3N4. In comparative tests, the photocatalytic degradation performance of Mix-CuO/g-C3N4 (the mixture of CuO and g-C3N4 nanosheets prepared by mechanically mixing) is even lower than that of pure g-C3N4. The degradation of RhB is only 19.7% under visible light after 30 min of irradiation. The improvement in the photoactivity of CuO/g-C3N4 results from the built-in electric field close to the formed p–n heterojunction, which switches the electron transfer mechanism from a double-charge transfer mechanism to a Z-scheme mechanism. In addition, the formed p–n heterojunction favors charge transfer, and thus the photocatalytic performance is significantly improved.
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高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2016
·Vol. 2016
·期 34
·5387-5392
·
IF 2.686
Liang Zhou,Lingzhi Wang,Jinlong Zhang,Juying Lei,Yongdi Liu
Graphical A heterogeneous photo-Fenton system (Fe 2 O 3 /g-C 3 N 4 /H 2 O 2 /visible light) has been developed for highly efficient and stable catalytic degradation of organic pollutants in water. The combination of the Fenton's reagent Fe 2 O 3 /H 2 O 2 and the photocatalyst g-C 3 N 4 greatly enhances the rate of the Fenton's reaction with the assistance of the photocatalytic process. In this study, a highly efficient heterogeneous photo-Fenton system (Fe 2 O 3 /g-C 3 N 4 /H 2 O 2 /visible light) has been developed. The heterogeneous catalyst Fe 2 O 3 /g-C 3 N 4 in this system was successfully prepared by growing Fe 2 O 3 nanoparticles on the surface of g-C 3 N 4 . The Fe 2 O 3 nanoparticles could achieve high dispersion on the surface of g-C 3 N 4 and form a heterojunction with g-C 3 N 4 to improve the charge separation. In addition, the combination of the Fenton's reagent Fe 2 O 3 /H 2 O 2 and the photocatalyst g-C 3 N 4 greatly enhances the rate of the Fenton's reaction with the assistance of the photocatalytic process. The results showed that the Fe 2 O 3 /g-C 3 N 4 catalyst had a superior catalytic activity as compared with the single component of Fe 2 O 3 or g-C 3 N 4 and the mechanical mixture of Fe 2 O 3 and g-C 3 N 4 . The catalyst prepared with 3 mL of FeCl 3 aqueous solution shows the best photo-Fenton photocatalytic efficiency with a reaction rate constant of 0.02461 mg L –1 min –1 , which is about 45.4, 8.4 and 7.2 times larger than that of pure Fe 2 O 3 (0.0005418 mg L –1 min –1 ), pure g-C 3 N 4 (0.00294 mg L –1 min –1 ) and the mechanically mixed Fe 2 O 3 /g-C 3 N 4 (0.0034 mg L –1 min –1 ), respectively. A possible mechanism for the visible-light-irradiated photo-Fenton photocatalysis is proposed, and the Fe 2 O 3 /g-C 3 N 4 catalyst exhibited stable performance without obvious loss of catalytic activity after four successive runs, showing a good application prospect for the photo-oxidative degradation of organic contaminants in wastewater.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Xuecheng Liu,Linjie Yan,Xiting Hu,Hongli Feng,Bingke Guo,Xia Ha,Hui Xu,Ruiqi Wang,Xuemei Tan,Hongyu Huang
A series of MnO 2 /g-C 3 N 4 composites with different exposed crystal plane were successfully prepared by different synthesized method. UV–Vis, PL , ESR and electrochemical results suggest that the visible-light absorbance, photoexcited electron-separation efficiency and oxygen defects are greatly dependent on the exposed crystal-faceted MnO 2 supported on g-C 3 N 4 . The experimental results display that the exposed crystal plane of MnO 2 have great influences on the photocatalytic hydrogen evolution performance, and the m-MnOCN composite with exposed (111) crystal plane exhibits superior photocatalytic performance for the release of H 2 under visible light irradiation , followed by the order of b-MnOCN [002]> p-MnOCN [110]. Moreover, Mechanism studies have shown that the possible mechanism of photocatalytic hydrogen evolution reaction is Z-scheme mechanism.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Meng Wang,Huihua Huang,Xiaofeng Ma,Chaokang Huang,Xiaohong Peng
Bacterial infection and its induced oxidative stress as major clinical challenge during wound healing call for an urgent response for the development of medical dressings with multi-functions, such as antioxidant and antibacterial. To meet this demand, copper metal organic framework nanoparticles (HKUST NPs) and carboxymethyl chitosan-g-glutathione (CMCs-GSH) were synthesized and characterized. By embedding HKUST NPs into PAM/CMCs-GSH hydrogel (AOH), we developed a novel hydrogel dressing (HKUST-Hs) with dual effects of antibacterial and antioxidant. The morphology, swelling behavior, oxidation resistance and antibacterial properties of HKUST-Hs were investigated as well as the slow-release behavior of copper ions . Full-thickness cutaneous wound model of rats was created to assess the promoting effect of HKUST-Hs on wound healing. We found that HKUST NPs could be well dispersed in HKUST-Hs by shielding the positive charge of copper ions , and thus copper ions released were uniformly distributed and chelated with CMCs-GSH to promote the swelling stability of HKUST-Hs. Also, HKUST-Hs exhibited good free radical scavenging ability in vitro antioxidant assay. Meanwhile, a gradient sustained-release system of copper ions was formed in HKUST-Hs owing to the inhibition of HKUST NPs to copper release and the chelation of CMCs-GSH, which effectively inhibited the explosive release of copper ions and prolonged the release period, thereby reducing cytotoxicity. In vitro antibacterial test demonstrated there was synergistic antibacterial effect between the slow-released copper ions and CMCs-GSH, which improved the antibacterial activity and antibacterial persistence of HKUST-Hs. Finally, HKUST-Hs accelerated wound healing in vivo by continuously killing bacteria and inhibiting oxidative stress.
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DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-9
·
IF 5.228
Li Yueyun,Zhang Yihe,Jiang Liping,Chu Paul K.,Dong Yunhui,Wei Qin
A sandwich-type immunosensor is designed and fabricated to detect the human immunoglobulin G (HIgG) using polyaniline and tin dioxide functionalized graphene (GS-SnO 2 -PAN) as the platform and biotin-functionalized amination magnetic nanoparticles composite (B-Fe 3 O 4 @APTES) as the label. GS-SnO 2 -PAN is used as the sensing agent to capture the primary anti-HIgG (Ab 1 ) and SnO 2 reduces the stack of GS. The B-Fe 3 O 4 @APTES with a large surface area and excellent biocompatibility captures second antibody (Ab 2 ) efficiently based on the highly selective recognition of streptavidin to biotinylated antibody. The B-Fe 3 O 4 @APTES has better electro-catalytic activity in the reduction of hydrogen peroxide (H 2 O 2 ) and the “biotin-streptavidin-biotin” (B-SA-B) strategy leads to signal amplification. Under optimal conditions, the immunosensor has a wide sensitivity range from 1 pg/L to 10 ng/L and low detection limit of 0.33 pg/L (S/N = 3) for HIgG. The immunosensor has high sensitivity, fast assay rate, as well as good reproducibility, specificity, and stability especially in the quantitative detection of biomolecules in serum samples.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Shixian Zhang,Xinshan Rong,Ting Sun,Ping Gao,Jun Liu,Xuchun Qiu,Xiangtong Zhou,Zhiren Wu
With the increasingly severe environmental problems the traditional high pollution and high energy consumption of nitrogen fixation industry is striving to develop new cleaner production technology. In this work, we designed and prepared the 3D porous g-C 3 N 4 with nitrogen vacancy (3DV N PCN) through a combination of alkali-assisted and supramolecular self-assembly methods. Subsequently, we synthesized, characterized and employed a Z -scheme 3DV N PCN/CoFe 2 O 4 photocatalyst with strong nitrogen adsorption and activation for nitrogen photofixation. The results show that the best photofixation nitrogen efficiency of the photocatalyst can reach 14.66 mmol/g/h within 120 min. This nitrogen fixation process carried out at room temperature, and only requires water and nitrogen as raw materials, which has the advantage of being energy efficient, environmental friendly and pollution-free.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yali Song,Long Huang,Xiaojing Zhang,Hongzhong Zhang,Lan Wang,Huan Zhang,Yali Liu
A method combining g-C 3 N 4 and potassium peroxydisulfate (PDS) under simulated sunlight was put forward to effectively degrade sulfamethoxazole (SMX). The SMX removal efficiency was substantially improved compared with the processes involving only g-C 3 N 4 or PDS. The kinetic constants for the g-C 3 N 4, PDS and g-C 3 N 4 /PDS systems were 0.0023, 0.0239 and 0.068 min −1 , respectively. The g-C 3 N 4 /PDS process reached an SMX removal rate of 98.4 % after 60 min of simulated sunlight; in addition, the proposed system showed desirable efficiency for SMX degradation in two different actual water samples as well. The reaction mechanism was illustrated by trapping experiments, which showed that g-C 3 N 4 can promote S 2 O 8 2− to transfer SO 4 − , S 2 O 8 2− favored the generation of O 2 − , and O 2 − , SO 4 − and holes (h + ) were the main oxidative species for the SMX degradation in the combined reaction process under simulated sunlight. Then, to further explore this mechanism, the intermediates generated during the combined reaction process were analyzed by LC/MS and possible degradation pathways were proposed. The result showed that the breaking of the S N and C–S bonds, the hydroxylation of the benzene ring and the oxidation of the amino group were identified as the main pathways in the SMX degradation process by the g-C 3 N 4 /PDS system under simulated sunlight.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 36
·16750-16759
·
IF 3.591
Yining Zheng,Cundi Wei,Qi An,Jinsheng Yu,Shaonan Xu,Lina Li
The aluminum alloy is used as the aluminum source, together with melamine and cyanuric acid, in a water reaction system to obtain the precursor of Al2O3/g-C3N4 through self-assembly in one step, and then calcined to obtain the Al2O3/g-C3N4 composite photocatalytic material. γ-Al2O3 has a defect site that can accept g-C3N4 electrons and can bind well with g-C3N4. The addition of γ-Al2O3 changed the morphology of g-C3N4 into a damaged tubular structure with many irregular pores. Also, the specific surface area increased to about 1.2 times that of g-C3N4, and the light absorption edge was extended to 500 nm. In addition, the position of the valence band of g-C3N4 was also changed. Compared with g-C3N4, Al2O3/g-C3N4 has better photocatalytic performance, and the degradation rate of dye rhodamine B (RhB) is about 1.70 times that of g-C3N4.
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高影响因子
Journal of Hazardous Materials Advances
·
2021
·
IF 0
Xiao-Yu Zhang,Jing-Jing Wang,Ping Li,Yu-Jia Xiao,Zhao-Yi Tan,Yan-Rong He,Nuzahat Habibul
Herein, Fe 3 O 4 /g-C 3 N 4 composites with different proportions were prepared to remove U(VI) from wastewater through photocatalytic reduction. The morphology, composites, and magnetism of the Fe 3 O 4 /g-C 3 N 4 composites were measured. The characterization results showed that Fe 3 O 4 nanoparticles were well distributed on the surface of g-C 3 N 4 , resulting in the good magnetism and corresponding excellent separation ability of the composites. The U(VI) removal efficiency of the composites with different ratios of Fe 3 O 4 and g-C 3 N 4 was also determined. It was found that Fe 3 O 4 /g-C 3 N 4 with an Fe content of 14% showed the highest U(VI) removal efficiency of 98.7% after 25 min. The photocatalytic reaction rate constant was 0.161 min −1 , which was 2.9 times that of pure g-C 3 N 4 and 2.4 times that of pure Fe 3 O 4 . In addition, after five reaction cycles, the composite showed high photoreduction activity and magnetic properties.
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