COMPOSITES COMMUNICATIONS
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2025
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IF 7.7
Wei Wang,Hong Cao,Jian You,Yongzhao Li,Weihe Yu,Huaiyin Chen,Longmin Liu,Meihua Wu,Yuekun Lai,Weilong Cai
As the raw material for fabricating polyphenylene sulfide (PPS) fibers, PPS resin exhibits great processing and application value. However, the oxidative cross-linking among PPS molecules at high temperatures causes increasing melt viscosity and decreasing fluidity, making PPS processing difficult and lower production quality and efficiency. In this research, we realize the dual improvement of PPS resin in the fluidity and oxidation resistance by introducing a new AO-g-C 3 N 4 composite modifier. First, an antioxidant (AO) was grafted onto the surface of graphitic carbon nitride (g-C 3 N 4 ) through amination to synthesize AO-g-C 3 N 4 . Subsequently, AO-g-C 3 N 4 was incorporated into PPS resin using the melt extrusion process, yielding a novel flow-enhancing and antioxidant PPS-based composite material. It is found that the AO-g-C 3 N 4 /PPS material possesses excellent properties with a significantly raised melt index (>50 %) and notably decreased shear viscosity (>20 %). Besides, the dynamic oxidation induction temperature of AO-g-C 3 N 4 /PPS has increased, indicating inhibited oxidative cross-linking, while the crystallinity has increased. These suggest that the incorporation of AO-g-C 3 N 4 into PPS resin can enhance its fluidity and antioxidation properties, providing valuable insight for the modification research of PPS resin. The AO-g-C 3 N 4 /PPS exhibits the characteristic of easier processing, which offers promising prospects for developing the downstream industry of PPS resin.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2022
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IF 6.267
Fang Wang,Zhe Chen,Zhenzhou Zhu,Jia Guo
Antibiotics in pharmaceutical and aquaculture wastewater is a growing threat to the environment of world, due to the induction of drug-resistant bacteria and the harm to the aquatic organisms. Photocatalytic membrane, which has immobilized photocatalyst on membrane is an effective and environmentally friendly technology for antibiotics degradation. In this study, a novel photocatalytic membrane was prepared by loading ZnO/N-g-C 3 N 4 composite on commercial polymer membrane with glutaraldehyde as a crosslinker through pressure driven filtration. The loading of the photocatalyst over the membranes was validated by Fourier transform infrared spectroscopy, scanning electron microscope and X-ray photoelectron spectroscopy. The photocatalytic properties of ZnO/N-g-C 3 N 4 composite membrane were observed efficient for degradation of tetracycline, ciprofloxacin and ofloxacin in both immersion and filtration model under visible light (λ > 420 nm). Especially, a ZnO/N-g-C 3 N 4 loading amount of 1.12 g/cm 2 and glutaraldehyde concentration of 45% led to the degradation rate of 100% and 80% for tetracycline at 5 mg/L and 10 mg/L, respectively. Low trans-membrane pressure (0.005 MPa) and narrow membrane size (50 kDa) were favorable for antibiotics degradation in filtration model due to long reaction time on membrane surface. Construction and performance of ZnO/N-g-C 3 N 4 composite membrane might provide new strategy for energy saving wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Qi Wang,Ningyi Li,Meng Tan,Man Deng,Guoxiang Yang,Qiang Li,Hao Du
Photocatalysis is an emerging technique for the remediation of refractory organic contaminants. Herein, a novel dual Z-scheme Bi/BiOI-Bi 2 O 3 -C 3 N 4 heterojunctions were constructed through a calcining process following with I − etching and UV-reduction processes. Various analytical technologies were adopted to characterize the materials. As a result, the Bi 0 decorated composite presented improved visible-light-response and rapid charge transfer. Due to the synergy of Bi 0 and dual Z-scheme heterostructures, a remarkable photocatalytic performance toward phenol degradation was achieved with the highest degradation efficiency of 93.2% and rate constant of 0.0161 min −1 over the optimal composite within 75 min of visible light irradiation. Interestingly, the concentration of the yielded benzoquinone considerably decreased with the introduction of C 3 N 4 . Trapping experiments and electron spin resonance (ESR) tests indicated that h + , O 2 − , OH and e − contributed to phenol remediation, and h + and O 2 − were the crucial species toward phenol degradation. Furthermore, outstanding stability was obtained only with a decline of 3.8% after 4 cycles. A reasonable charge transfer mechanism was also proposed. This work provides a new route for in situ construction of Bi 0 decorated dual Z-scheme heterojunction for phenolic compounds degradation.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Yiping Feng,Guang Chen,Yijian Zhang,Daguang Li,Chen Ling,Qiaoying Wang,Guoguang Liu
Development of economic and efficient absorbent for the simultaneous removal of antibiotics and heavy metals is needed. In this study, a three-dimensional porous ultrathin g-C 3 N 4 (UCN) /graphene oxide (GO) hydrogel (UCN-GH) was prepared by co-assembling of UCN and GO nanosheets via the facile hydrothermal reaction . Characterizations indicated that the addition of UCN significantly decreased the reduction of C O and O-C O related groups of GO during the hydrothermal reaction and introduced amine groups on UCN-GH. The UCN-GH exhibited excellent ability on the co-removal of Cu(II) ( q max = 2.0–2.5 mmol g −1 ) and tetracycline (TC) ( q m ax = 1.2–3.0 mmol g −1 ) from water. The adsorption capacities were increased as UCN mass ratio increasing. The mutual effects between Cu(II) and TC were examined through adsorption kinetics and isotherm models. Characterizations and computational chemistry analysis indicated that Cu(II) is apt to coordinate with the amine groups on UCN than with oxygen groups on GO, which accounts for the enhanced adsorption ability of UCN-GH. In the binary system, Cu(II) acts as a bridge between TC and UCN-GH enhanced the removal of TC. The effects of pH and regular salt ions on the removal of Cu(II)/TC were examined. Moreover, the prepared UCN-GH also showed comparable co-adsorption capacities in practical water/wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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水污染控制
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2021
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IF 3.315
Yanhua Gao,Wenli Zhao,Dongfeng Zhang
In this paper, the growth mechanism of prismatic carbon nitride at different temperatures was studied by using the mixed solution of CTAB and NaOH by thermal polycondensation-hydrothermal method, and a series of characterization methods were used to analyze and verify. The pollutant model MO solution was degraded and its photocatalytic activity was investigated under light. The results show that at a relatively low temperature, g-C 3 N 4 is a rod-like structure, and NaOH plays a major role. With the increase of temperature, CTAB plays a major role and can transport the primitives to form a rod, but also forms an ordered hydrophobic film on the crystal plane, which inhibits the growth of the rod-like structure on the (100) crystal plane and controls the extension on the (002) crystal plane. Its degradation rate is about 2.64 times that of pure g-C 3 N 4 . This significantly improves the separation rate of photogenerated electrons and the photocatalytic degradation efficiency.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
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2025
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IF 6.7
Lanyu Qi,Guofeng Ma,Ronghui Kou,Ziyao Wang,Hongling Zhang,Yanhong Yang
The Fenton-like process is a highly efficient and widely applied advanced oxidation technology for degrading organic pollutants under dark conditions. However, its development is limited by low H 2 O 2 utilization, incomplete mineralization, and limited optimal pH range. We developed a CoAl-LDH/porous g-C 3 N 4 catalyst via high-temperature thermal polymerization with NH 4 HCO 3 as a dynamic gas template and urea as a precursor. The reaction rate constant of CoAl-LDH/porous g-C 3 N 4 -H 2 O 2 system for degradation of Rhodamine B is 0.0199 min −1 , which is about 1.58 times that of the CoAl-LDH-H 2 O 2 system. Moreover, the catalyst sustained performance over four cycles and maintained high activity in degrading three different substrates. The high catalytic activity is attributed to the rich porous structure of g-C 3 N 4 , the presence of abundant active sites, and the synergistic interaction between the CoAl-LDH and g-C 3 N 4 , which promotes the generation of ·OH, 1 O 2 , ·O 2 − , facilitating pollutant degradation. This study highlights the potential of this CoAl-LDH/porous g-C 3 N 4 -based Fenton-like system for applications in dye wastewater treatment.
研究领域:
环境科学
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催化材料
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废水处理
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2016
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IF 2.758
Jiang Cheng,Xuelian Yan,Qionghua Mo,Bitao Liu,Jun Wang,Xin Yang,Lu Li
A g-C 3 N 4 /BiVO 4 composite photocatalyst with enhanced photocatalytic activity and photoelectrochemical (PEC) performance was fabricated via a simple synthesis method with BiVO 4 nanofibers as starting material. The materials were characterized with different techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared spectroscopy (FT-IR), N 2 absorption–desorption isotherm (BET) and photoluminescence spectroscopy (PL). The results showed that this synthesis method is effective to make a composite. The photocatalytic evaluation indicates that the photocatalytic activity of the g-C 3 N 4 /BiVO 4 photocatalyst for methylene blue (MB) was about 8 and 7 times higher than that of pure BiVO 4 and g-C 3 N 4 , respectively. This should be due to the enhanced light harvesting ability and to the effective electron transfer during the photocatalytic reaction.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2018
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IF 6.042
Yuchen Jin,Qi Kang,Xinli Guo,Bin Zhang,Dazhong Shen,Guizheng Zou
Signal amplification for electrochemiluminescence (ECL) has conventionally been achieved by employing effective matrixes that can accelerate the electrochemical redox processes or carry more electrochemiluminophores. Herein, a convenient signal-amplification strategy was proposed for an ECL immunoassay with carboxylated g-C3N4 nanosheets (NSs) as tags and carcinoembryonic antigen (CEA) as the model target via electrochemically pretreating the substrate: a glassy-carbon electrode (GCE) modified with a polymerized 2-aminoterephthalic acid (ATA) film (GCE/ATA). Bioconjugates of g-C3N4 NSs and the signal CEA antibody (Ab2) (i.e., g-C3N4 NS–Ab2) were immobilized on GCE/ATA via a sandwich immunoreaction to form GCE/ATA–Ab1–Ag–Ab2–NSs. Electrochemical-impedance spectroscopy and potential-resolved ECL characterization proved that GCE/ATA plays an important role in the electron-transfer resistance (Ret) of the GCE/ATA–Ab1–Ag–Ab2–NSs for ECL and that successively scanning GCE/ATA–Ab1–Ag–Ab2–NSs from 0 to −1.6 V in K2S2O8- and H2O2-containing medium could reduce the Ret and bring out 3.3-times-enhanced ECL at the 10th scan cycle compared with that of the 1st scan cycle, which was about 10.2 times the ECL of the GCE/ATA–Ab1–Ag–Ab2–NSs in medium containing merely K2S2O8. Inspired by this, direct and successive scanning of GCE/ATA in K2S2O8- and H2O2-containing medium was employed during fabrication, which dramatically reduced the Ret of GCE/ATA–Ab1–Ag–Ab2–NSs and brought out obviously enhanced ECL responses for selectively determining CEA from 0.1 pg/mL to 1 ng/mL, with a detection limit of 3 fg/mL.
研究领域:
分析化学
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
Materials Horizons
·
2025
·
IF 10.7
Yihao Duan,Haihua Wang,Guiqiang Fei,Yu Wang,Liyu Sun
Modification of graphitic carbon nitride (g-C3N4) with semiconductor nanomaterials has been widely investigated as an effective method to enhance its photocatalytic activity. However, the construction of efficient g-C3N4-based heterojunction photocatalysts via an environmentally benign method remains critical. Herein, a two-dimensional (2D) few-layered MoS2/S-doped g-C3N4 hierarchical heterojunction was successfully synthesized by a simple strategy via combining small molecule-assisted liquid exfoliation, calcination and hydrothermal strategy, which was subsequently utilized for photocatalytic formaldehyde removal. The evaluation of the photocatalytic degradation reaction showed that the as-prepared 2D/2D MoS2/S-doped g-C3N4 photocatalysts exhibited superior photocatalytic activity compared to pristine g-C3N4 and S-doped g-C3N4 alone, which was attributed to the intimate interface and rapid charge transfer pathways. This heterojunction structure suppresses the excited electron–hole pair recombination within g-C3N4, which optimally enhances the photodegradation activity owing to high electron–hole pair separation efficiency. The few-layer MoS2 nanosheets play an irreplaceable role due to their unique molybdenum–sulfur atomic arrangement, thereby displaying the superior electronic properties of few-layer or even monolayer nanosheets, which make them an important transfer medium for photoexcited electrons. Meanwhile, S doping effectively modulates the band gap of g-C3N4 and introduces sufficient structural defects to inhibit electron–hole recombination. Moreover, the synthesis employs efficient and non-hazardous reagents, and the resulting catalysts exhibit outstanding stability and recyclability for pollutant degradation.
研究领域:
材料科学
·
环境催化
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纳米材料
·
光化学
·
污染控制
✓ 已验证
产品关联
DOI
PubMed
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.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2019
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IF 3.839
Jianhua Ge,Long Zhang,Jing Xu,Yujie Liu,Daochuan Jiang,Pingwu Du
Nitrogen photofixation using g-C 3 N 4 -based photocatalysts have attracted abundant of attentions recently. Herein, in this study, holey g-C 3 N 4 (HGCN) nanosheets possess a good deal of carbon vacancies were prepared by means of thermally treating bulk g-C 3 N 4 (BGCN) under an NH 3 atmosphere. Characterization analysis revealed that the as-synthesized sample have identical crystal structure, larger BET specific surface area, stronger reduction capability, and higher photogenerated charge carrier separation rate than that of BGCN. These properties may contribute to enhance the nitrogen photofixation activity. It was also found that the rate of NH 4 + production for N 2 photofixation of HGCN sample reached ∼25.54 mg L -1 h -1 g -1 cat , which is approximately ∼5.87 times higher than that of BGCN sample under optimal reactive conditions. Moreover, a plausible mechanism of HGCN for nitrogen photofixation process was illuminated in detail.
研究领域:
光催化
·
材料化学
·
环境化学
·
能源化学
·
纳米材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Shuhui Liang,Manman He,Jingjing Guo,Jie Yue,Xipeng Pu,Bo Ge,Wenzhi Li
The BiOBr:Yb 3+ ,Er 3+ /g-C 3 N 4 (BYE/CN) p-n junction photocatalysts were successfully fabricated by a stepwise method. Experimental results show that Er 3+ /Yb 3+ were successfully doped into BiOBr lattice. As-obtained BYE/CN exhibited strong NIR light absorption and upconversion emission from NIR to UV–visible due to the upconversion transition of Er 3+ . The p-n junction was constructed due to the appropriate alignment band structure of BYE and g-C 3 N 4 , which distinctly suppresses the recombination rate of electron-hole pairs. Compared with pure BYE and CN, as-synthesized BYE/CN samples exhibit distinctly improved photoactivities under the irradiation of visible or NIR light, which can be attributed to the upconversion effect of Er 3+ and the construction of p-n junction. This result may provides a promising system for efficient harvest of the NIR light, which will contribute to the utilization of solar energy in the future.
研究领域:
材料科学
·
光催化
·
能源利用
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）