JOURNAL OF HAZARDOUS MATERIALS
·
2014
·
IF 4.331
Fa-tang Li,Ye Zhao,Qing Wang,Xiao-jing Wang,Ying-juan Hao,Rui-hong Liu,Dishun Zhao
Novel Al 2 O 3 /g-C 3 N 4 heterojunction photocatalysts were fabricated through ultrasonic dispersion method. Al 2 O 3 , obtained via solution combustion, contained amorphous ingredient with lots of defect sites and was used as active component for transferring photo-induced electrons of g-C 3 N 4 . G-C 3 N 4 was grafted surface hydroxyl groups in the presence of ammonia aqueous solution to combine with Al 2 O 3 possessing positive charges via hydrogen bond . The XRD, SEM, element map, TEM , HRTEM, FT-IR, and XPS results indicate that these synthesized materials are two-phase hybrids of Al 2 O 3 and g-C 3 N 4 with interaction. The photocatalytic results for the degradation of rhodamine B (RhB) indicate that the most active heterojunction proportion is 60 wt.% g-C 3 N 4 :40 wt.% Al 2 O 3 , the visible light photocatalytic activity of which is 3.8 times that of a mechanical mixture. The enhanced performance is attributed to the high separation efficiency of photo-induced electrons from the LUMO of g-C 3 N 4 injected into the defect sites of Al 2 O 3 , which is verified by photoluminescence spectroscopy (PL) and surface photovoltage (SPV) measurements. The electron paramagnetic resonance (EPR) signals and radical scavengers trapping experiments reveal holes (h + ) and superoxide anion radical ( O 2 − ) are the main active species responsible for the degradation of RhB.
✓ 已验证
DOI
PubMed
高影响因子
Nanoscience and Nanotechnology Letters
·
2019
·Vol. 11
·期 6
·804-812
·
IF 0
Chen Ling,Liu Yumeng,Matras-Postolek Katarzyna,Yang Ping
Graphitic carbon nitride (g-C3N4) nano-materials with different morphologies were prepared in this study by two-steps through controlling the mercapto group-induced assembly. Mercaptopropyl trimethoxysilane (MPS)-decorated SiO2 nanospheres were employed
as hard templates to produce g-C3N4 in the first step. Different morphologies of g-C3N4, such as hollow spheres, nanotubes and quasi-belts, were created in the second step by controlling the concentration of etching agents, reaction time, and process.
During the etching process, the mercapto groups in MPS can induce the assembly of g-C3N4 and play a crucial role of tuning the morphologies of g-C3N4, which is the key point for morphology adjustment. To enhance photolysis activity, cobalt-, boron-,
and carbon-doped g-C3N4 were further prepared to tune the band gap and absorption in visible light. The morphologies of doped samples changed after doping. In addition, carbon self-doped g-C3N4 exhibited the best photo-redox activity due to increased
visible light absorbance, electrical conductivity, and narrow band gap.
✓ 已验证
DOI
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Mengying Yang,Yunfan Jia,Yun Chen,Pengcheng Yan,Li Xu,Junchao Qian,Feng Chen,Henan Li
Photoelectrochemical (PEC) aptasensor is a promising analysis platform with high selectivity and sensitivity. Exploration of photoelectric active material with excellent photoelectric conversion efficiency is the key condition to design a PEC aptasensor with excellent sensitivity. Herein, a PEC aptasensor was designed and constructed by g-C 3 N 4 /Bi 24 O 31 Cl 10 heterojunction as photoelectric active material for realizing sensitive detecting enrofloxacin (ENR) antibiotic. The formation of heterojunction can facilitate separation and transfer of photogenerated carriers and reduce the recombination rate, leading to the enhancement of photocurrent response compared to that of individual semiconductor. The ENR aptamer was introduced as the specific recognition element to realize excellent selectivity of the PEC aptasensor. Because ENR-aptamer complex can block the transfer of charge, the ENR-PEC aptasensor presented the decreased photocurrent response with the increasing of ENR concentration without external voltage. The developed ENR-PEC aptasensor presented excellent sensitivity and selectivity for detecting ENR with a detection range from 0.5 to 100 fM and a low detection limit of 0.167 fM (S/N = 3). The ENR-PEC aptasensor with good reproducibility may be potential for the determination of the actual samples.
✓ 已验证
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 2
·333
·
IF 3.426
Yifan Chen,Qian Li,Yujie Li,Qijun Zhang,Jingda Huang,Qiang Wu,Siqun Wang
In this work, cellulose nanocrystals (CNCs) obtained by the acid hydrolysis of waste bamboo powder were used to synthesize cellulose nanocrystal-g-poly(acrylic acid-co-acrylamide) (CNC-g-P(AA/AM)) aerogels via graft copolymerization followed by freeze-drying. The structure and morphology of the resulting aerogels were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), and the CNC-g-P(AA/AM) aerogels exhibited excellent absorbent properties and adsorption capacities. Subsequent Pb(II) adsorption studies showed that the kinetic data followed the pseudo-second-order equation, while the adsorption isotherms were best described using the Langmuir model. The maximum Pb(II) adsorption capacity calculated by the Langmuir model reached up to 366.3 mg/g, which is a capacity that outperformed that of the pure CNC aerogel. The CNC-g-P (AA/AM) aerogels become structurally stable through chemical cross-linking, which enabled them to be easily regenerated in HCl solution and retain the adsorption capacity after repeated use. The aerogels were found to maintain 81.3% removal efficiency after five consecutive adsorption–desorption cycles. Therefore, this study demonstrated an effective method for the fabrication of an aerogel adsorbent with an excellent reusability in the effective removal of Pb(II) from aqueous solutions.Keywords:cellulose nanocrystal;graft copolymerization;aerogel;adsorption;lead
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 18
·11069-11076
·
IF 10.733
Zongjie Sun,Yuhan Li,Shuyang Zhang,Lei Shi,Hu Wu,Huaitian Bu,Shujiang Ding
Solid polymer electrolytes (SPEs) are expected to improve the safety and performance of lithium ion batteries (LIB). However, the low ionic conductivity limit the further application of PEO based electrolytes. Herein, g-C3N4 nanosheets is proposed as a novel filler for PEO based electrolytes. The addition of g-C3N4 improves the electrical properties (ionic conductivity, lithium ion transference number and electrochemical window), mechanical properties and thermal stability of the composite electrolyte. The two-dimensional g-C3N4 forms an effective ion transport network in the composite electrolyte. In addition, the surface atoms of the g-C3N4 interact with groups in the lithium salt, promoting further dissociation of the lithium salt. Furthermore, the all solid state batteries assembled by the g-C3N4 composite electrolyte exhibited good cycle performance at 60 °C (remained at 155 mA h g−1 after 100 cycles). Owing to the simple synthesis and environmental friendliness, g-C3N4 nanosheets has a certain practical prospect as a filler for solid polymer electrolytes.
✓ 已验证
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 3
·247
·
IF 4.501
Ping Ke,Danlin Zeng,Jiawei Cui,Xin Li,Yang Chen
A highly-efficient graphitic carbon nitride (g-C3N4) photocatalyst for visible light photodegradation of rhodamine B (RhB) and methyl orange (MO) simulating dyeing wastewater was synthesized by the thermal polycondensation of melamine. The photocatalysts were characterized by TG-DTG-DSC, XRD, EA, XPS, FT-IR, SEM, TEM, BET, PL and UV-vis DRS. The results showed that the photocatalytic performance of g-C3N4at a higher calcination temperature was significantly enhanced, and its photocatalytic activities for the photodegradation of RhB and MO were remarkably improved by 64.91% and 41.83%, respectively, which was mainly attributed to the satisfactory crystallinity, stable graphene-like structure, large surface area, and excellent optical properties. It was found that •O2−radicals and •OH radicals were the main active species for the photodegradation process by the free radicals trapping experiments and ESR analysis. The photodegradation mechanism of g-C3N4was proposed predicated using the characterization results.
✓ 已验证
DOI
高影响因子
Journal of Renewable Materials
·
2020
·Vol. 8
·期 1
·45-55
·
IF 1.341
Ma Yufeng,Gong Xuanang,Jia Puyou
In order to improve the comprehensive performance of phenolic foam, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) was grafted with itaconic acid (ITA) (DOPO-g-ITA) to modify microcrystalline cellulose (MCC). DOPO-g-ITA modified MCC (DIMMCC) was used to prepare composite
phenolic foam (DCPF). The structures of DIMMCC were verified by Fourier transform infrared spectroscopy (FT-IR). The microstructure and crystalline property were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD) respectively. Compared with MCC, the crystallinity
of DIMMCC was dramatically decreased, but the diffraction peak positions were unchanged. Thermal stability was decreased, and Ti decreased by 45.0°C. The residual carbon (600°C) was increased by 22.34%. With the dosage of DIMMCC/PR increased, compared with PF, the mechanical properties
and flame retardancy of DCPF were increased. Especially, the dosage of DIMMCC/PR was 10%, the comprehensive properties of DCPF was better than others.
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2016
·
IF 2.101
Fang Deng,Lina Zhao,Xule Pei,Xubiao Luo,Shenglian Luo
The g-C 3 N 4 /SnS 2 composites were prepared by in situ hydrothermal method , and the effect of g-C 3 N 4 content on the physical and chemical properties, and photocatalytic performance of g-C 3 N 4 /SnS 2 composites was investigated. The introduction of g-C 3 N 4 enhanced the visible-light absorption of SnS 2 , and reduced the recombination rate of electron-hole pairs. The photocatalytic performance of g-C 3 N 4 /SnS 2 composites was also obviously influenced by g-C 3 N 4 content, and it was found that 15% g-C 3 N 4 /SnS 2 composite exhibited the highest photocatalytic activity and excellent regeneration, which was attributed to the most efficient charge separation, the largest specific surface area and the formation of dominant active species (h + and O 2 − radicals) during the photocatalytic process.
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 186
·期 1
·1-9
·
IF 5.705
Huang Yanli,Tan Yi,Feng Chuanqi,Wang Shiquan,Wu Huimin,Zhang Guangxue
The preparation of 3 kinds of carbonaceous nanocomposites by hydrothermal treatment and subsequent calcination described. The first comprises a nanomaterial of type CuO/g-C 3 N 4 , with g-C 3 N 4 in mass fractions of 2, 5 and 7 wt%, respectively. The second comprises CuO/porous carbon (5 wt%), and the third comprises CuO/carbon spheres (5 wt%). All of them were employed to modify a glassy carbon electrode (GCE) to obtain electrochemical sensors for glucose and dopamine. The GCE modified with CuO/g-C 3 N 4 (5 wt%) displays the highest electrocatalytic activity towards glucose and dopamine. Figures of merit for sensing glucose (in 0.1 M NaOH solution) include a wide linear range (0.5 μM to 8.5 mM), a detection limit of 0.150 μM, and a sensitivity of 0.274 μA·μM −1 ·cm −2 (at a working potential of 0.60 V vs. Ag/AgCl). The respective data for dopamine (in pH 7.0 solution) are linear ranges from 0.2-16.0 μM and 16.0-78.7 μM, a lower detection limit of 60 nM, and an electrochemical sensitivity of 0.834 and 0.331 μA·μM −1 ·cm −2 (at a working potential of 0.22 V vs. Ag/AgCl). The good performance of the modified GCE is attributed to the synergetic interactions between CuO and the appropriate fraction of g-C 3 N 4 , and the improvement of conductivity.
Schematic presentation of a electrochemical sensor based on CuO/g-C 3 N 4 for the determination of glucose and dopamine.
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 42
·20146-20153
·
IF 3.925
Zhengxing Gong,Jing Luo,Xinrong Shao,Xu Sun,Huan Wang,Dan Wu,Dawei Fan,Yuyang Li,Qin Wei,Huangxian Ju
A novel quenching electrochemiluminescence (ECL) immunosensor for the trace detection of neuron-specific enolase (NSE) was developed. Doping CdS with Zn2+ to obtain ZnCdS not only significantly improves the original properties of CdS, but also can be loaded onto the surface of g-C3N4 to form a special complex structure, which effectively improves the ECL performance of g-C3N4. Rh0.6Ru0.4 alloys with flower-like structures were prepared by simple hydrothermal synthesis, with excellent electrical conductivity and catalytic performance. Due to its special flower-like structure with a large specific surface area, Ag nanoparticles can be uniformly loaded on its surface to form Rh0.6Ru0.4@Ag composites. Through spectral comparison, it was found that Rh0.6Ru0.4@Ag has strong UV-vis absorption in the ECL emission wavelength range of g-C3N4, which can generate resonance energy transfer, thereby effectively quenching the ECL signal. The immunosensor has a wide detection range with a detection limit of 16 fg mL−1 (S/N = 3), good stability and biocompatibility, and has great potential in clinical application.
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Sepideh Pourhashem,Jizhou Duan,Fang Guan,Nan Wang,Ying Gao,Baorong Hou
In this research, the effects of visible-light-driven titanium dioxide (TiO 2 ) nanotube/graphitic carbon nitride (g-C 3 N 4 ) hybrids on the corrosion protection performance of epoxy coatings both in the dark and under visible-light irradiation are studied. For this, TiO 2 nanotube/g-C 3 N 4 hybrids and 3-(aminopropyl)triethoxysilane functionalized hybrids were synthesized and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy , scanning electron microscopy coupled with energy dispersive X-ray spectroscopy mapping, N 2 adsorption/desorption technique, and UV–Vis spectroscopy. TiO 2 nanotubes containing 30 wt% g-C 3 N 4 (H30%) showed the highest photocatalytic performance due to the simultaneous effects of high surface area and band-gap structure; however, the photocatalytic activity decreased after the silane functionalization of H30%. Then, epoxy coatings containing H30% and silane functionalized H30% in different amounts (0.1, 0.3, and 0.5 wt%) were prepared, and their corrosion resistance was investigated by electrochemical impedance spectroscopy in NaCl solution. The results revealed that the epoxy coatings containing 0.3 wt% hybrids have higher corrosion resistance than that of the neat coating, and silane-functionalized nanofillers more effectively enhance the corrosion resistance. However, when these nanocomposite coatings are irradiated with visible light , their corrosion protection performance remarkably reduces owing to the degradation of organic matrix by the oxidizing radicals formed on the photocatalytic hybrid surface.
✓ 已验证
DOI
高影响因子
Journal of Central South University
·
2022
·Vol. 29
·期 5
·1447-1462
·
IF 2.392
Yang Ting,Hu Xin-yu,Wang Jun-tao,Yang Tian-li,Wang Wen-lei
A series of In x Sb 2− x S 3 nanosheets modified g-C 3 N 4 (In x Sb 2− x S 3 -TCN) heterojunctions with different g-C 3 N 4 contents were fabricated by an in situ deposition method. All the In x Sb 2− x S 3 -TCN composites were applied as photocatalysts in Cr(VI) polluted water treatment and the results displayed that In x Sb 2− x S 3 -TCN could effectively remove Cr(VI) under visible light through synergistic effects of adsorption and photocatalytic reduction. Especially, In x Sb 2− x S 3 -TCN-70 (70 mg g-C 3 N 4 ) exhibited the most excellent adsorption and photocatalytic reduction performance among all composites, which possessed a high equilibrium adsorption capacity of 12.45 mg/g in a 30.0 mg/L Cr(VI) aqueous solution, and reduced Cr(VI) to Cr(III) within 10 min under visible light irradiation. DRS and PL results indicated that the interfacial coupling effect between g-C 3 N 4 and In x Sb 2− x S 3 enhanced the utilization efficiency of visible light and suppressed photoinduced carrier recombination, which improved the photocatalytic activity of composites. Moreover, the photocatalyst exhibited satisfactory reduction activity and good stability after 5 cycles of Cr(VI) adsorption-photoreduction.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）