Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2020
·
IF 4.706
Muthuchamy Maruthupandy,Pan Qin,Thillaichidambaram Muneeswaran,Govindan Rajivgandhi,Franck Quero,Ji-Ming Song
Highly pure zinc oxide nanoparticles (ZnO NPs) and graphene-zinc oxide nanocomposites (G-ZnO NCs) were synthesized via chemical precipitation method. The structure, morphology, and composition of the synthesized ZnO NPs and G-ZnO NCs were characterized by using fourier transfer infrared spectroscopy, X-ray diffraction spectroscopy, Raman spectroscopy, scanning electron microscopy and transmission electron microscopy (TEM). The TEM images revealed that the diameter of ZnO NPs is 8–12 nm and homogeneously dispersed onto the surface of graphene sheets. The photocatalytic degradation efficiency of the synthesized G-ZnO NCs against rhodamine-B (Rh-B), methylene blue (MB) and methyl orange (MO) was quantified under visible light irradiation. The irradiation time required for complete removal of the dyes are dependent on dye molecules (MB, MO and Rh-B) and their interaction with the prepared ZnO NPs and G-ZnO NCs. The synthesized NCs were highly efficient for the removal of Rh-B compared to other tested dyes. Hence, the synthesized G-ZnO NCs could be used for environmental dye remediation.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 8
·e5703
·
IF 3.14
Xue-Wen Liu,Ning-Yi Liu,Yuan-Qing Deng,Shan Wang,Ting Liu,Yu-Cai Tang,Yuan-Dao Chen,Ji-Lin Lu
The detection of G-quadruplex is of major interest. Nitro-substituted ruthenium (II) complexes have attracted much attention due to fluorescent sensitivity to environment change. We report here a new nitro-substituted ruthenium (II) complex, [Ru (phen) 2 (hnoip)] 2+ ( 1) (hnoip = 2-(2-hydroxyl-5-nitrophenyl)imidazo[4,5- f ][1,10-phenanthroline]), which displays distinct fluorescent properties in aqueous solution and non-aqueous solvents. This complex exhibits large fluorescence enhancement after binding with G-quadruplex DNA, and displays good fluorescent selectivity over other DNAs. The limit of detection is 6 n m for 22AG in Na + and 43 n m for 22AG in K + , respectively. The results demonstrated that nitro-substituted ruthenium (II) complexes can be utilized to design as G-quadruplex fluorescent probes by protection of the nitro group on the complex from water.
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 28
·16515-16525
·
IF 3.119
Junya Cao,Fenggang Han,Liguo Wang,Xiaoyu Huang,Yan Cao,Peng He,Huanhuan Yang,Jiaqiang Chen,Huiquan Li
A series of Ru/g-C3N4 materials with highly dispersed Ru were firstly prepared by an ultrasonic impregnation method using carbon nitride as a support. The catalysts were characterized by various techniques including BET and elemental analysis, ICP-AES, XPS, XRD, CO2-TPD and TEM. The results demonstrated that Ru/g-C3N4 materials with a mesoporous structure and highly dispersed Ru were successfully prepared. The chemo-selective hydrogenation of p-phenylenediamine (PPDA) to 1,4-cyclohexanediamine (CHDA) over Ru/g-C3N4 as a model reaction was investigated in detail. PPDA conversion of 100% with a CHDA selectivity of more than 86% could be achieved under mild conditions. It can be inferred that the carbon nitride support possessed abundant basic sites and the Ru/g-C3N4-T catalysts provided suitable basicity for the aromatic ring hydrogenation. Compared to the N-free Ru/C catalyst, the involvement of nitrogen species in Ru/g-C3N4 remarkably improved the catalytic performance. In addition, the recyclability of the catalyst demonstrated that the aggregation of Ru nanoparticles was responsible for the decrease of the catalytic activity. Furthermore, this strategy also could be expanded to the selective hydrogenation of other aromatic diamines to alicyclic diamines.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Xu Wang,Hui Xiong,Tanghan Chen,Yayan Xu,Gongxun Bai,Junjie Zhang,Ying Tian,Shiqing Xu
The phosphorus-doped carbon nitride nanosheets (P-g-C 3 N 4 nanosheets) were prepared by ultrasonic stripping. Through the performance characterization, it was found that the P-g-C 3 N 4 nanosheets emitted pure blue light with stable performance. Compared with other metal ions , it was found that the quenching reaction between P-g-C 3 N 4 nanosheets and Fe 3+ was the strongest. The detection limit of Fe 3+ was found to be about 1.63 μM. P-doped g-C 3 N 4 is expected to be an efficient fluorescent probe for Fe 3+ detection.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2021
·Vol. 30
·期 2
·562-568
·
IF 3.667
Gong Ping,Zhao Youxi,Li Ke,Tian Huafeng,Li Chuanming
Soy protein isolate (SPI) has the advantages of low cost, easy processing, stable performance and so on. However, the processing temperature of SPI is high, the processed products are hard and brittle with high water absorption capacity, so it is necessary to modify the soybean protein during processing. Small molecule plasticizer is commonly used globally to plasticize and modify soybean protein. Different plasticizer content has different plasticizing effect on protein, and the properties of materials prepared will also vary greatly. The plasticizer can affect the viscosity of the blends morphology and properties by changing the viscosity of protein phase. In this work, glycerol with the excellent plasticizing effect was selected as plasticizer, and SPI was plasticized with glycerol of different contents, and then the plasticized SPI was blended with poly (butylene adipate-co-terephthalate)(PBAT) to prepare biodegradable blend materials. The influence of plasticizer content on the structure and properties of the blends was explored by observing the microstructure, mechanical and thermal properties of the blends. The results showed that with the increase of glycerol content, the crystallization temperature and melting temperature of the blend system increased, the chain segment was easier to move, and the glass transition temperature(Tg) decreased. At the same time, the viscosity of the blending system decreases, which improves the processing fluidity of the system.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Xueteng Zhu,Hexia Deng,Gang Cheng
Photocatalytic reduction of CO 2 into fuels is a promising approach to address the energy crisis and global warming issues. In this work, g-C 3 N 4 -W 18 O 49 nanocomposite material was constructed by a simple solvothermal method. The W 18 O 49 nanorods have a good dispersion by coupling with the g-C 3 N 4 sheet. Under simulated sunlight irradiation, the g-C 3 N 4 -W 18 O 49 nanocomposite exhibited superior photocatalytic CO 2 reduction capability than that of g-C 3 N 4 and W 18 O 49 . The photo/electrochemical measurements demonstrated that the g-C 3 N 4 -W 18 O 49 heterojunction could accelerate the separation and migration of charge carries, thus improving the activity of photocatalytic reduction of CO 2 into CH 4 and CO.
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Ziyang Zhou,Xiaohong Ji,Sepideh Pourhashem,Jizhou Duan,Baorong Hou
Two dimensional nanomaterials including graphene oxide (GO), graphitic carbon nitride (CN), and their nanohybrids (GO@CN) are used for enhancing the corrosion resistance of waterborne epoxy coatings. The nanomaterials functionalized with 3-aminopropyltriethoxysilane are loaded in the waterborne epoxy matrix by solution mixing method through probe-sonication and mechanical mixing. The corrosion resistance of the pure waterborne epoxy (PE) and the nanocomposite coatings in 3.5 wt% NaCl solution is evaluated by electrochemical impedance spectroscopy and salt spray test; revealing that the epoxy coating loaded with 0.1 wt% silane functionalized GO@CN nanohybrid has the highest chemical stability and corrosion resistance, due to the well-distribution of the nanohybrid in the polymer matrix. This research exhibits the importance of developing nanocomposite coatings based on two dimensional nanohybrids to overcome the shortcomings of the nanomaterials and to simultaneously utilize from their advantages in a coating system.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 32
·14655-14664
·
IF 3.591
Jing Yan,Xiaomin Song,Bo Jin,Rufang Peng
Nitro explosive photocatalytic degradation is of great importance. Herein, novel and efficient polyethylenimine-g-C3N4/BiOCl (PEI-CN/BC) heterojunctions were constructed through electrostatic self-assembly. Zeta potential results showed that the PEI-CN surface was positively charged. Transmission electron microscopy findings proved that PEI-CN and BC successfully formed a close contact PEI-CN/BC heterostructure. The photocatalytic effect of PEI-CN/BC on PNP degradation was also investigated under simulated light conditions. The results showed that the obtained 1PEI-CN/2BC (mass ratio of PEI-CN to BC was 1 : 2) had the best photocatalytic effect and could completely degrade PNP in 90 min. The apparent rate constant (k) of the reaction was 21.9 and 4.0 times that of PEI-CN and BC alone, respectively. Photoelectrochemistry and photoluminescence results showed that the improved electron–hole separation was the main reason for the superior photocatalytic performance of PEI-CN/BC. Free radical trapping experiments and electron paramagnetic resonance measurements revealed that superoxide radicals were the major active substance in the photodegradation. This work provides inspiration and alternatives in designing new efficient 2D/2D heterogeneous photocatalysts for the efficient degradation of nitro explosive wastewater.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xin Li,Jingru Guan,Haopeng Jiang,Xianghai Song,Pengwei Huo,Huiqin Wang
Construction of multi-interface contact step-scheme (S-scheme) photocatalyst is a promising pathway to achieve high-electron transfer efficiency for photocatalytic CO 2 reduction. In this paper, g-C 3 N 4 nanosheets were selected as the main photocatalyst, rod-like CeO 2 (R-CeO 2 ) with unique Ce 4+ →Ce 3+ conversion property and rGO were loaded on the g-C 3 N 4 surface to construct 2D-1D-2D sandwich photocatalyst. The yields of CO and CH 4 were about 63.18 and 32.67 μmol/g after 4 h when the rGO/R-CeO 2 /g-C 3 N 4 was used as catalyst, which were about 4 and 6 times higher than that of pure CN, respectively. Cyclic experiments proved that the composite had excellent photocatalytic and material stability. Photoelectrochemical tests showed that the construction of S-scheme electron transfer model and the introduction of rGO can great enhance the electron transmission and separation of photogenerated electron-hole pairs. CO 2 adsorption test identified that the loading of R-CeO 2 and rGO obviously enhanced the CO 2 adsorption ability of pure g-C 3 N 4 . Density functional theory (DFT) calculations used to analyze the electron transfer path and the formation of the build-in electric field at the semiconductor interface. In-situ FTIR and 13 CO 2 element-tracer detection carried out to research the process of CO 2 photoreduction. A possible multi-interface contact S-scheme electron transfer mechanism for enhanced CO 2 photoreduction activity has been discussed.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Linhai Yang,Xuechang Ren,Yujie Zhang,Zuoyan Chen
This article is an in-depth study of the basis of Cu + -decorated triazine-based g-C 3 N 4 (Cu + /g-C 3 N 4 ) nanosheet-activated H 2 O 2 . In this study, peroxymonosulfate (PMS) was activated by Cu + /g-C 3 N 4 under sunlight and used to treat simulated wastewater RhB. The properties of g-C 3 N 4 and Cu + /g-C 3 N 4 were characterized by UV–Vis DRS and PL . The results indicated that the introduction of Cu + in g-C 3 N 4 can enhance the separation of photogenerated electron-hole pairs. The Cu + /g-C 3 N 4 (1:4) samples exhibited the best PMS activation performance under sunlight when 0.5 g/L catalyst dose and 0.5 mmol/L PMS concentration were used, and the removal rate of RhB reached 95.7% in 30 min. Moreover, better catalytic activity of the system can be achieved in the initial pH range of 2.0–10.0. The investigation results of the catalytic mechanisms showed that the prepared Cu + /g-C 3 N 4 catalyst constructs a dual reaction center of Cu + /Cu 2+ cycling and e CB − / h VB + transfer for efficient PMS activation. The degradation of pollutants benefits from the participation of a variety of free radicals, which are generated by sunlight-assisted heterogeneous activation of PMS. This study has resulted in substantial progress in activating multiple oxidants with a single heterogeneous catalyst and provides a feasible way to treat refractory wastewater using Cu + /g-C 3 N 4 with PMS under sunlight.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2021
·Vol. 22
·期 21
·11466
·
IF 5.924
Miaomiao Qi,Xiang Liu,Ying Zhou,Haoyu Wang,Ying Zhao,Jing Ren,Jin Xiang
G protein-coupled estrogen receptor 1 (GPER1) is a potential therapeutic target for treating triple-negative breast cancers (TNBC). However, modulators for GPER1 that can be used to treat TNBC have not appeared. Berberine (BBR) is a bioactive isoquinoline alkaloid with high oral safety. In recent years, BBR has shown an inhibitory effect on TNBC tumors such as MDA-MB-231, but the molecular target remains unclear, which hinders related clinical research. Our work proved that BBR is a modulator of GPER1 that can inhibit cell viability, migration, and autophagy of MDA-MB-231 cells. The inhibitory effect of BBR on MDA-MB-231 cells has a dependence on estrogen levels. Although BBR promoted the proteasome, which is a major factor in the degradation of GPER1, it could still induce the protein level of GPER1. Correspondingly, the transcription of cellular communication network factor 2 (CCN2) was promoted. BBR could bind to GPER1 directly and change the secondary structure of GPER1, as in the case of 17β-estradiol (E2). In addition, BBR induced not only a high degree of co-localization of GPER1 and microtubule-associated protein 1 light chain 3 (MAP1LC3), but also the accumulation of sequestosome 1 (SQSTM1/p62) by the inhibition of the nuclear translocation of the nuclear factor-kappa B (NF-κB) subunit (RELA/p65), which indicates NF-κB inhibition and anti-cancer effects. This result proved that the promotional effect of BBR on the GPER1/NF-κB pathway was closely related to its inhibitory effect on autophagy, which may serve as a new mechanism by which to explain the inhibitory effect of BBR on MDA-MB-231 cells and expand our understanding of the function of both BBR and GPER1.Keywords:berberine;binding;co-localization;GPER1;MAP1LC3;NF-κB
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Hongmei Chen,Yanyun Fan,Zheng Fan,Hongyan Xu,Danfeng Cui,Chenyang Xue,Wendong Zhang
Photocatalytic water splitting under irradiation by sunlight to achieve hydrogen with the participation of semiconductor materials is deemed as the most promising green and clean energy supply strategy. Hence, it is particularly important and emergency to design photocatalyst with both high activity and stability to perform high-efficiency hydrogen evolution reaction (HER). In this study, we report a competitive coordination strategy to modulate the electron and band structure of g-C 3 N 4 dramatically improving the HER kinetics. Experimental and density functional theory (DFT) calculations results inferred that the modified g-C 3 N 4 by copolymerizing urea and diaminodiphenyl sulfone can promote the effective separation of photogenerated electrons and holes, and simultaneously significantly increase the fluorescence lifetime of g-C 3 N 4 . Specifically, the hydrogen generation rate is 3.7 or 9.6 folds higher of the original carbon nitride at λ > 400 nm and λ > 420 nm, respectively. Additionally, the optimal catalyst exhibits a high apparent quantum yield (7.02%) when the incident wavelength is 420 nm as well as excellent stability. This work will shed a spick-and-span insight for conception and preparation of high-powered metal-free photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）