Journal of Coatings Technology and Research
·
2025
·
IF 2.8
Tang Baoling,He Ziyu
The commonly used dispersants for graphene dispersions reduce the conductivity of the composite. In this work, a dispersant with an amphiphilic structure, CA-g-PANI, has been designed and synthesized. The dispersant grafts citric acid (CA) onto polyaniline via an amide reaction, which gives CA-g-PANI the hydrophilic groups (carboxyl groups) and the benzene ring structures that can be π–π conjugated with graphene, and it can improve the dispersion properties of graphene; CA-g-PANI contains the polyaniline structure, which is electrically conductive and enhances the electrical conductivity of graphene dispersions. The molecular structure and properties of the dispersant were systematically characterized through FTIR spectra, UV absorption spectra, and other methods. The graphene-based composites were prepared by screen printing method, and the dispersibility and resistivity of CA-g-PANI were compared with gum arabic and alkali lignin (natural dispersants). Graphene concentration reached up to 30 mg/mL in the presence of CA-g-PANI at the weight ratio of 1:0.03 (CA-g-PANI: graphene). CA-g-PANI also exhibited good performance for stabilizing graphene (stable for 6 days), with an electrical conductivity of up to 917.43 S/m. In the study, it was shown that CA-g-PANI as a graphene dispersant improved the conductivity of graphene dispersions while enhancing the dispersing properties of graphene.
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高影响因子
ACS Omega
·
2025
·
IF 4.3
Wenbiao Zheng,Mingfeng Yu,Sujuan Yang,Licong Meng,Yonghe Xiu,Yifan Liu,Hanhui Lei,Terence Xiaoteng Liu,Zhanhui Yuan,Liwei Wang
Membrane separation is an important separation and purification technology, membrane materials are the key to membrane separation technology, and the rapid development of two-dimensional materials in recent years has brought new opportunities for membrane separation technology. Graphene oxide (GO) is a hydrophilic two-dimensional material, and its unique physical and chemical structure and properties give it the potential to become a high-performance separation membrane; however, the instability limits its application. In this study, a two-dimensional material, graphite-phase carbon nitride (g-C3N4), was integrated into graphene oxide (GO) to address the challenges associated with its practical applications. This modification not only endows the material with more advantageous properties as a membrane but also introduces a heterogeneous structure that bolsters the composite membrane’s stability. This structure also enhances the permeability and selectivity of the membrane, leading to impressive results in self-driven permeation tests and staggered-flow filtration tests under applied pressure. Following additional surface charge modifications, the composite membrane demonstrated a separation efficiency of approximately 90.4% in permeation tests and an impressive separation efficiency of 63.8% in filtration tests for binary mixed salt solutions. These results indicate a significant capability for mono- and divalent ion separation, suggesting promising potential for salt separation applications.
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PubMed
高影响因子
CRYSTENGCOMM
·
2025
·Vol. 27
·期 36
·6048-6055
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IF 2.6
Xiangrong Li,Mengzhou Wu,Yanling Wang,Wentao Qu,Guoqiang Li
Among various semiconductors evaluated for photoelectrochemical (PEC) water splitting, gallium nitride (GaN) has emerged as a promising photoelectrode material due to its wide, direct bandgap, which allows for more efficient sunlight utilization. To address the issue of severe surface states that hinder its performance, graphitic carbon nitride (g-C3N4) was introduced as a passivation layer. The resulting GaN/g-C3N4 heterojunction demonstrates a significant enhancement in PEC performance compared to pristine GaN nanorods (NRs), including a notable increase in photocurrent density. Importantly, this heterostructure is also capable of driving PEC water splitting under zero external bias, which is primarily attributed to the efficient charge separation and transfer enabled by the Z-scheme mechanism. Overall, this study offers a novel strategy for passivating surface states in nanomaterials and underscores the promising role of g-C3N4 in PEC water splitting applications.
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INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
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2020
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IF 2.671
Wei Li,Youkang Wu,Zhenzhen Xu,Qingqing Ni,Jian Xing,Xuchen Tao
Caproylated starch (CS) with different degrees of substitution (DS) and poly(acrylic acid)- g -protein- g -poly(methyl acrylate) (PAA- g -protein- g -PMA) were prepared and then blended as an adhesive material to improve the adhesion of starch to polylactic acid (PLA) fibers for fulfilling the high-valued utilization of feather wastes and enhancing the end-use issue of starch in textile sizing . The CS and PAA- g -protein- g -PMA were characterized by Fourier transform infrared (FT-IR) spectroscopy and proton nuclear magnetic resonance ( 1 H NMR), respectively. The adhesion was evaluated by measuring bonding forces of the blends to PLA fibers. The FT-IR and 1 H NMR analyses demonstrated the successful preparations of CS and PAA- g -protein- g -PMA, respectively. The adhesion results showed that the adhesion of CS/PAA- g -protein- g -PMA blends to PLA fibers were superior to that of acid-converted starch (40.6 N), indicating that blending can improve the adhesion of starch to PLA fibers. The adhesion of the blends to PLA fibers was correlated with the DS values of CS samples and blending ratios of PAA- g -protein- g -PMA to CS. With the increase in the DS, bonding force increased, reached its highest value of 53.9 N at DS = 0.027, and then decreased to 52.2 N (DS = 0.033). When the DS value was 0.027, the forces gradually increased from 45.5 to 53.9 N as the ratios were raised from 0 to 7.5 wt%. In brief, the suitable DS value and blending ratios were 0.027 and 5 ~ 7.5 wt% for the use of CS/PAA- g -protein- g -PMA blend as an adhesive material in the application of PLA sizing.
研究领域:
材料科学
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纺织工程
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生物化学
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高影响因子
Polymers
·
2018
·Vol. 10
·期 9
·967
·
IF 2.935
Si Gao,Ji Zhao,Xing Wang,Yanzhu Guo,Ying Han,Jinghui Zhou
This study focused on the structural differences of lignin after pyridine–acetic acid–water (PAW) and dioxane–acidic water (DAW) purification processes. These structural differences included the S/G ratio, condensed structure, weight-average (MW) molecular weights, β-O-4 linkages and sugar content. The chemical structure of the isolated crude lignin (CL), PAW purified lignin (PPL) and DAW purified lignin (DPL) was elucidated using quantitative13C NMR, 2D-HSQC NMR spectra, thermogravimetric analysis (TGA), gel permeation chromatography (GPC) and Fourier transform infrared spectroscopy (FTIR). The results showed that the PPL fractions contain fewer condensed structures, higher S/G ratios, more β-O-4 linkages, higher average MWand lower thermal degradation properties compared to the CL and DPL fractions. Furthermore, the PAW process was more selective in removing condensed units and enriching S-type lignin from CL compared to the DAW process. These results provide valuable information for understanding which purification process is more suitable to be applied for lignin.Keywords:lignin purification;structural recognition;condensed lignin;S/G ratio
研究领域:
植物化学
·
生物质能源
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2015
·
IF 3.368
Dandan Tang,Gaoke Zhang,Sheng Guo
This study determines the potential of manganese oxide (MnO x ) nanoparticles for the activation of peroxymonosulfate (PMS). The MnO x nanoparticles were prepared by a facile co-precipitation method and the degradation rates of acid red G (ARG) by the as-prepared catalysts in the presence of PMS were measured. The results showed that the Mn 3 O 4 nanoparticles with tetragonal structure exhibited high catalytic activity for the degradation of ARG by activating PMS to generate radicals. The effects of the operational parameters on the catalytic property of the obtained nanosized Mn 3 O 4 catalyst were investigated in detail. The catalyst exhibits excellent catalytic activity in a wide range of pH from 2 to 12. Moreover, it still maintained high catalytic activity even after five reaction cycles, indicating the good stability of the catalyst. In addition, radical quenching studies were carried out to ascertain the dominating radical species and a proper mechanism was also proposed.
研究领域:
环境科学
·
催化化学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Menglu Zhang,Yueping Bao,Li-an Hou,Kexuan Gao,Yu Yang
To address the catalyst recovery issue in traditional photocatalysis processes, photocatalytic membrane reactors have emerged as a novel technology in recent years. However, the understanding of the differences in photocatalytic performance and mechanism between the membrane and slurry systems is missing. The current study provided a comprehensive comparison between the photocatalytic slurry system (CN-P) and membrane system (CN-M) in terms of bisphenol A (BPA) degradation and mineralization, in which the well-developed g-C 3 N 4 was chosen as the catalyst. The fabrication of CN-M was optimized via tuning initial urea concentration, and a series of characterization technologies confirmed the successful incorporation of g-C 3 N 4 onto the membrane. Different reaction mechanisms were proposed in two systems via the identification of contributed reactive species and the degradation products. The “sea anemone effect” in the membrane system enhanced the mass transfer between the reactive species and the BPA molecules and promoted the BPA mineralization with less toxic intermediates. Furthermore, the CN-M exhibited excellent anti-fouling and self-cleaning properties with a much lower irreversible fouling resistance than the original membrane and could be regenerated rapidly after visible light irradiation. These findings provided new insights for the CN-M system as a promising and reliable alternative to the traditional photocatalytic process, which is of great significance and importance in promoting the practical application of photocatalytic membranes in water treatment.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2014
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IF 6.007
Ze’ai Huang,Qiong Sun,Kangle Lv,Zehui Zhang,Mei Li,Bing Li
In this paper, effect of contact interfaces of high-energy TiO 2 , (1 0 1) and (0 0 1) facets, with g-C 3 N 4 on the photocatalytic activity of g-C 3 N 4 /TiO 2 hybrid was studied using TiO 2 hollow nanobox (TiO 2 -HNB) assembly from high-energy TiO 2 nanosheets (TiO 2 -NS) as model. The prepared photocatalyst was characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscopy (SEM), nitrogen sorption , Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectrometer (XPS). The photoreactivity of the photocatalyst was evaluated by measure the formation rate of photo-induced hydroxyl radicals ( OH) using coumarin as a probe molecule and photocatalytic degradation of Brilliant Red X3B (an anionic dye) under UV irradiation ( λ = 365 ± 10 nm). It was found that g-C 3 N 4 /TiO 2 -HNB forms direct Z-scheme photocatalytic system, which shows superior enhancement on the photocatalytic activity of TiO 2 than g-C 3 N 4 /TiO 2 -NS. It is by contacting g-C 3 N 4 with (1 0 1) facets, g-C 3 N 4 can efficient remove the photo-generated electrons accumulated on (1 0 1) facets of high-energy TiO 2 , which results in spatially isolated photo-generated electrons and holes, enhancing the photocatalytic activity.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Jie Zhou,Jing Ding,Hui Wan,Guofeng Guan
Phosphorus-doped g-C 3 N 4 /ZnIn 2 S 4 (PCN/ZIS) heterojunction photocatalysts were constructed by solvothermal method . The physical and chemical properties were investigated with X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS), etc. The degradation of antibiotic wastewater was used to investigate the photocatalytic activities of composites under visible-light irradiation. The 10% PCN/ZIS had the best photocatalytic degradation performance for tetracycline with a photodegradation rate of 0.0874 min −1 , which is respectively about 2.9 and 52.0 times than that of pure ZIS and PCN. Meanwhile, it was concluded that the holes and ⋅O 2 – (superoxide radicals) play dominant roles in the photocatalytic reactions through radicals trapping experiments, while ⋅OH (hydroxyl radicals) has a negative effect. In addition, 10%PCN/ZIS, with excellent stability and recyclability, also exhibited high photocatalytic activity for terramycin, chlortetracycline and ofloxacin . Overall, with the enhanced photocatalytic performance, PCN/ZIS could be potentially applied for photocatalytic degradation of antibiotic wastewater.
研究领域:
环境科学
·
材料科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Xueye Zhuang,Shiman He,Long Hu,Qian Shi,Hui Wang,Renzong Hu
LiBH 4 has been considered as a promising solid electrolyte for lithium-ion batteries. However, the low ionic conductivity at room temperature has been the biggest challenge of LiBH 4 solid-state electrolyte (SSE) toward practical solid-state batteries. In this work, a ternary electrolyte is designed and prepared by milling LiBH 4 with LiNH 2 and interfacially decorated with g-C 3 N 4 . It is revealed that the soft dispersed phase of two-dimensional g-C 3 N 4 can build an effective transportation network in the composite electrolyte, thereby decreasing the interfacial impedance and reducing the energy barrier for lithium ion diffusion. The optimized SSE, LiBH 4 -2LiNH 2 -g-C 3 N 4 -10 % (LBN-CN-10 %), exhibits an ionic conductivity of 1.5×10 −3 S cm −1 , five orders of magnitude higher than that of the LiBH 4 electrolyte at 30 °C. The LiIn symmetric cell with LBN-CN-10 % electrolyte delivers a low polarization of ∼89 mV over 10,000 h. When assembling with Li 4 Ti 5 O 12 cathode, the all-solid-state battery exhibits excellent cycling over 1000 cycles at 30 ℃, achieving a breakthrough in the lifetime of solid-state batteries with LiBH 4 -based electrolyte. Moreover, the all-solid-state battery with LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode also delivers a discharge plateau at 3.0 V, revealing the high voltage withstanding of LBN-CN-10 % electrolyte. This work provides new options for the development and practical application of room-temperature hydride all-solid-state batteries.
研究领域:
材料科学
·
能源存储技术
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高影响因子
MEASUREMENT
·
2025
·
IF 5.6
Zhuo Ren,Jianan Liu,Xingkai Wang,Xin Lv,Xiaoting Wu,Yu Zhang,Zhihai Liu
Biomarkers, such as immunoglobulin G (IgG), play a critical role in disease diagnosis and related fields. To address spatial constraints in biomarker detection, it is essential to develop an ultra-compact sensor with high sensitivity. In this study, we construct dual microcavities in series using two-photon polymerization (TPP) onto the end face of a fiber. The sensor, with a total height of 86 μm, achieves a refractive index sensitivity of 8256.2 nm/RIU, representing a 7-fold enhancement compared to a single microcavity with identical parameters. Additionally, the sensor demonstrates IgG detection with a limit of detection (LOD) as low as 28.6 ng/mL. By confining the sensor to the microscale while maintaining high sensitivity, this work presents a novel approach for the in vivo detection of IgG and other biomarkers.
研究领域:
生物光子学
·
生物传感器
·
生物医学工程
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光学传感
·
即时诊断
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Nannan Zheng,Jia Lu,Jiali Liu,Yinyan Xu,Hongwei Zheng,Xinle Xiao,Chunlei Dong
Phosphorus regulation tunes the electronic environment of g-C 3 N 4 nanotubes. • P-assisted interfacial interaction enhances MoO 3 /PCNNTs charge transport. • MoO 3 /PCNNTs shows reproducible RhB kinetics (0.16706 ± 0.00477 min −1 ). • Post-reuse analyses confirm operational retention and framework preservation. • Combined evidence supports an S-scheme-like working model with ROS generation. Developing efficient photocatalysts with tunable interfacial properties is important for pollutant removal. Here, phosphorus-modified graphitic carbon nitride nanotubes (PCNNTs) were coupled with α-MoO 3 to prepare MoO 3 /PCNNTs heterostructures. CNNTs, PCNNTs, MoO 3 /CNNTs, and MoO 3 /PCNNTs were compared to examine the effects of phosphorus modification and MoO 3 coupling. XPS revealed changes in the P-, Mo-, and O-containing chemical environments after MoO 3 coupling. Among the carbon-nitride-based samples, MoO 3 /PCNNTs showed the largest BET specific surface area (101.2 m 2 g −1 ), the smallest apparent optical band gap (2.72 eV), and the lowest fitted charge-transfer resistance (314.2 Ω). Under white-LED irradiation, the representative apparent pseudo-first-order rate constant of MoO 3 /PCNNTs for RhB removal was 0.1718 min −1 . Five independent experiments gave mean rate constants of 0.1671 ± 0.0048 min −1 for MoO 3 /PCNNTs and 0.1007 ± 0.0057 min −1 for MoO 3 /CNNTs. The composite also showed removal of MB, MO, and TC-HCl with pollutant-dependent responses, and maintained higher RhB removal than MoO 3 /CNNTs over six consecutive reuse cycles. Post-cycling characterization retained the characteristic morphology and bulk structural features, alongside changes in the surface chemical environment. These comparative results associate phosphorus modification and MoO 3 coupling with altered material properties and improved pollutant-removal performance under the tested conditions. Download: Download high-res image (203KB) Download: Download full-size image
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