FUEL
·
2023
·
IF 7.4
Rongxin Cao,Hui Yuan,Ning Yang,Qihong Lu,Yuxiong Xue,Xianghua Zeng
Two-dimensional sulfide is considered as one of the best alternative for noble metal cocatalyst, whereas few-layered 1T WS 2 structure is very helpful to promote the photocatalytical activity for hydrogen generation. Herein, few-layered 1T-WS 2 /g-C 3 N 4 composites have been prepared via a facile one-step calcination route and used as a noble metal-free catalyst for H 2 evolution. The results showed that the optimized 1T-WS 2 /g-C 3 N 4 has a H 2 evolution rate of 10.08 mmol∙g −1 h −1 , which is 180 and 2.44 times larger than that of pure pristine g-C 3 N 4 and g-C 3 N 4 (Pt), respectively. The enhanced photocatalytic activity can be explained as the optimized 1T-WS 2 /g-C 3 N 4 sample has an increased light absorption (from visible to infrared region), better electrical conductivity and high density of active sites. The studies will be helpful for constructing high efficient heterostructured catalysts by loading 1T phase metal dichalcogenides 2D of material onto a two-dimensional material surface.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Yin Tang,Wen Cui,Songxia Wang,Fan Dong
Though photocatalytic purification of NO has been widely studied, how to avoid secondary pollution during gas-solid reaction is still a challenge, especially in inhibiting the formation of toxic intermediates (NO 2 ) and avoiding the blow away of powdery photocatalyst. Herein, we proposed a one-step solvothermal method to prepare melamine sponge (MS) supported and functionalized g-C 3 N 4 (CN), which simultaneously realizes the inhibition of NO 2 formation and catalyst loss. Sodium hydroxide , which plays a dual role, has been introduced during the preparation of supported photocatalyst. Specifically, sodium atom, as the modifier of performance, could facilitate the randomly distributed charge of pristine CN to be converged, which accelerates the adsorption/activation of reactants for efficient and deep NO oxidation . Hydroxyl group, as the binder between CN and MS, induces the interaction by forming hydrogen bonds , which contributes to the firm immobilization of powdery photocatalyst. The supported sample exhibits outstanding NO removal rate (58.90%) and extremely low NO 2 generation rate (1.41%), and the mass loss rate of photocatalyst before and after reaction is less than 1%. The promotion mechanism of performance also has been elaborated. This work takes environmental risks as a prerequisite to propose a feasible strategy for perfecting the practical application of photocatalytic technology .
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Fan Yang,Su Li,Hongyan Qi,Weibo Sun,Jinbao Li,Mei Zhang,Zheng Chen,Jinhui Pang,Zhenhua Jiang
Although poly (ether ether ketone) (PEEK) exhibits excellent solvent resistance , it could not be prepared directly by non-solvent induced phase separation (NIPS) method due to its poor solubility. Herein, PEEK porous membranes were successfully fabricated by combining NIPS and acid hydrolysis. The superhydrophilic thermo-responsive poly (N-isopropylacrylamide) (PNIPAm) polymer was in-situ grafted on the PEEK membrane surface via the UV grafting polymerization and improved the membrane interface hydrophilicity, making the membrane water contact angle changed from 89.5° to 0° at 25 °C. After heating the membrane surface to 40 °C, the membrane exhibited hydrophobicity (100°), realizing the thermo-responsiveness via switching the temperature. Furthermore, due to the transferred membrane wettability at different temperatures, PEEK-g-PNIPAm could separate different types of oil-bearing systems with high rejection above 99.0 %. What’s more, the PNIPAm layer also enhanced the membrane anti-fouling capacity. Benefiting from the extraordinary solvent resistance of the PEEK matrix, PEEK-g-PNIPAm maintains its intact morphology after 6 h immersion in various organic solvents , addressing the commonly reported problem of polymer membranes having certain solubility in solvents. The PEEK-based membranes with excellent solvent resistance could be useful in the oil-bearing separation.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Gang Liu,Sheng Xu,Wenting Li,Zhenxi Wang,Meng Cao,Jinlong Cui,Xinde Jiang,Zhengqiu Li
In order to improve the visible light catalytic activity of TiO 2 , the TiO 2 @g-C 3 N 4 (TCN) composite catalysts with three-dimensional porous structure and rich active sites were prepared by hydrothermal method and calcination method orderly. The synthesized TCN composites microstructures were thoroughly characterized and their performance for the photocatalytic degradation of organic dyes was investigated. The results show that the prepared composites formed the heterojunctions with a core-shell structure, which can effectively broaden the absorption spectrum of TiO 2 to visible light region. In the degradation experiments, the TCN composites exhibited excellent photocatalytic degradation effect on organic dyes, which can reach 99.65% under visible light irradiation for 2 h. The strong acid condition was benefit to the catalytic process. After five cycles of testing, the degradation efficiency of organic dyes can still maintain at 95.62% level, which indicate that the TCN composites had excellent visible light catalytic activity and reusability.
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 8
·1-13
·
IF 2.5
Zhu Jiantao,Wen He,Han Wei,Ma Jiantai,Zhang Feng,Liu Chaowei
The growing concern about the environmental consequences of anthropogenic CO 2 emissions significantly stimulated the research of low-cost, efficient, and recyclable solid adsorbents of CO 2 capture. Metal–organic frameworks (MOFs) are a promising porous material for CO 2 adsorption. Hybrid materials consisting in copper benzene-1,3,5-tricarboxylate (Cu-BTC) and Cu doped graphitic-carbon nitride (Cu-g-C 3 N 4 ) were prepared through solvothermal method as CO 2 adsorbent. The size range of Cu-BTC@1.8%Cu-g-C 3 N 4 was 9.0 ~ 19.4 μm, which was lower than the size range of Cu-BTC (14.6 ~ 29.6 μm). The hybrid adsorbents had lower Brunauer–Emmett–Teller (BET) surface areas and pole volume due to the combination with Cu-g-C 3 N 4 . The CO 2 adsorption capacity of Cu-BTC@1.8%Cu-g-C 3 N 4 increased by 49.5% compared with that of pure Cu-BTC because of more adsorption sites including unsaturated metal centers and N atoms. Moreover, the Cu-BTC@1.8%Cu-g-C 3 N 4 had good stability in CO 2 adsorption capacity after multiple adsorption cycles. Graphical abstract
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Yangyang Dai,Zhenhua Niu,Tian Fang,Yuanyuan Wang,Suyue Zhong,Peng Mu,Jian Li
The structural advantages of the membrane material itself are critical to the membrane separation performance. Two-dimensional (2D) graphitic carbon nitride (g-C 3 N 4 ) nanosheets can achieve minimal mass-transfer barrier and high gas sieving performance due to their ultra-thin thickness, inherent surface porosity and abundance of amine groups. However, the 2D g-C 3 N 4 nanosheets are prone to stacking during the self-assembly process, which reduces the membrane permeability. Based on this line, herein, we proposed a concept of construction of 1D-2D intercalated network supported ionic liquid membrane composed by one-dimensional (1D) carboxymethylcellulose ( CMC ) and g-C 3 N 4 nanosheets to overcome the low permeability of 2D graphitic carbon nitride membrane in separating CO 2 /N 2 and CO 2 /CH 4 . The as-prepared 1D-2D intercalated network supported ionic liquid gas separation membrane exhibits superior CO 2 permeance of 953.96 GPU, CO 2 /N 2 selectivity of 55.46 in separation of CO 2 /N 2 , and CO 2 permeance of 854.00 GPU, CO 2 /CH 4 selectivity of 50.62 in separation of CO 2 /CH 4 . In addition, the resulting CMC@g-C 3 N 4 /IL membrane has excellent durability. After 120 h of testing, it still has outstanding separation performance. In short, this concept in this study provides an effective modulation of molecular sieving of g-C 3 N 4 membrane for high-efficiency CO 2 capture by combination of the advantages of the 1D (CMC) and 2D (g-C 3 N 4 ) materials.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Juan Liu,Bing Liu,Cheng Chao Hu,Qing Wei Zhou,Kai Xin Song
(1– x )BaV 2 O 6 - x LiF ( x = 0.025, 0.05, 0.10, 0.15) ceramics with an ultra-low sintering temperature of 475 °C were synthesized using the standard solid-state reaction method. The ceramics demonstrated a remarkable enhancement in the quality factor ( Qf ), reaching a maximum value of 16,800 GHz at x = 0.10, which is 5.6 times higher than that of pure BaV 2 O 6 ceramics obtained in this work. A near-zero temperature coefficient of resonant frequency ( τ f = 1.44 ppm/°C) was simultaneously achieved, together with a dielectric constant ε r of 11.54. Additionally, the chemical compatibility between the present ceramics and the Al electrode was confirmed. Moreover, a millimeter-wave antenna with an excellent S 11 value of −50.3 dB, and a large bandwidth of 3.44 GHz was fabricated using the 0.9BaV 2 O 6 -0.1LiF ceramic as the dielectric resonator . These results highlight the potential application prospects of (1– x )BaV 2 O 6 - x LiF ceramics in the ultra-low temperature co-fired ceramic technology and 5 G millimeter-wave antennas.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Siao Li,Weisong Yan,Changyi Yang,Yanshu Zhu,Ying Liu,Yaohua Gu,Zhiqiang Wu,Keren Shi,Huiqin Yao
Acridine , as a nitrogen heterocyclic pollutant, poses a huge ecological and human health hazard, and its efficient degradation is one of the top tasks. A novel photo-enzyme-coupled catalytic system was constructed by coupling horseradish peroxidase (HRP) with graphite carbon nitride (g-C 3 N 4 ) through a simple inorganic hybridization process. The obtained g-C 3 N 4 /HRP nanoflowers not only increase the enzyme loading capacity and enzyme activity , but also promote the efficient separation of carriers. More importantly, the H 2 O 2 generated by g-C 3 N 4 directly participates in the redox cycle reaction of HRP, inducing photo-enzyme synergistic catalysis. Therefore, compared to HRP nanoflowers and g-C 3 N 4 nanoflowers, g-C 3 N 4 /HRP nanoflowers exhibited higher catalytic efficiency for the degradation of acridine. Thus, the photo-enzyme coupled catalyst proposed in this study provides a promising platform for the degradation of acridine pollutants by combining enzymes with photocatalysts through inorganic hybridization.
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高影响因子
ACS Catalysis
·
2023
·
IF 12.9
Qian Zhang,Mingzi Sun,Chen-Yue Yuan,Qi-Wen Sun,Bolong Huang,Hao Dong,Ya-Wen Zhang
Constructing abundant surface/interface structures has significant impacts on improving the performance of electrochemical CO2 reduction reaction (CO2RR) catalysts. For developing high-performance CO2RR catalysts, herein we report a 0D/2D heterojunction structure of SnO2 nanodots (∼2 nm) confined on graphitic carbon nitride (g-C3N4) nanosheets for promoting the conversion of CO2 to formate. Experimental and theoretical studies demonstrate that the abundant N-coordinating sites of g-C3N4 and highly distributed SnO2 nanodots synergistically lead to strong metal oxide–support interactions, and the substantial heterojunction interface in SnO2/g-C3N4 has induced efficient electron transfer from electron-rich g-C3N4 to SnO2 mainly through p–p orbital couplings. As a result, the SnO2/g-C3N4 heterojunction provides superior activity and stability for the conversion of CO2RR to formate, with a Faradic efficiency of 91.7% at −0.88 V vs RHE. Moreover, the proposed 0D/2D heterojunction strategy was extended to In2O3/g-C3N4, supplying a universal strategy to achieve efficient hybrid catalysts for CO2RR in the production of high-value chemicals.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shanshan Song,Miao Yang,Fei He,Xiao Zhang,Yijun Gao,Baichao An,He Ding,Shili Gai,Piaoping Yang
Nanozyme-based synergistic catalytic therapies for tumors have attracted extensive research attention. However, the unsatisfactory efficiency and negative impact of the tumor microenvironment (TME) hinder its clinical applications. In this study, we provide an easy method to prepare transition metals loaded onto pyrrolic nitrogen-rich g-C 3 N 4 (PN-g-C 3 N 4 ) for forming metal-N4 sites. This N-rich material effectively transfers electrons from g-C 3 N 4 to metal-N4 sites, promotes the oxidation–reduction reaction of metals with different valence states, and improves material reusability. Under TME conditions, copper ions loaded onto PN-g-C 3 N 4 (Cu-PN-g-C 3 N 4 , CPC) can produce ·OH through a Fenton-like reaction for tumor inhibition. This Fenton-like reaction and tumor cell inhibition can be improved further by a photodynamic effect caused by light irradiation. We introduced upconversion nanoparticles (UCNPs) into CPC to obtain nano-enzymes (UCNPs@Cu-PN-g-C 3 N 4 , UCPC) for effectively penetrating the tissue, which emits light corresponding to the UV absorption region of CPC when excited with 980 nm near-infrared (NIR) light. The nanoplatform can reduce H 2 O 2 concentration upon exposure to NIR light; this induces an increase in dissolved oxygen content and produces a higher supply of reactive oxygen species (ROS) for destroying tumor cells. Owing to the narrow bandgap (1.92 eV) of UCPC under 980 light irradiation, even under the condition of hypoxia, the excited electrons in the conduction band can reduce insoluble O 2 through a single electron transfer process, thus effectively generating O 2 •– . Nanoenzyme materials with catalase properties produce three types of ROS (·OH, O 2 •– and 1 O 2 ) when realizing chemodynamic and photodynamic therapies. An excellent therapeutic effect was established by killing cells in vitro and the tumor-inhibiting effect in vivo , proving that the prepared nanoenzymes have an effective therapeutic effect and that the endogenous synergistic treatment of multiple treatment technologies can be realized.
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PubMed
高影响因子
ANALYTICAL SCIENCES
·
2023
·Vol. 39
·期 8
·1391-1403
·
IF 1.6
Zhu Leijing,Ma Jing,Jin Danli,Zhang Yongjian,Wu Siyu,Xu Ajing,Gu Yingying,An Yarui,Miao Yuqing
The abnormal concentrations of human immunoglobulin G (hIgG) refers to many kinds of diseases. Analytical methods with the characteristics of rapid response, easy operation and high sensitivity should be designed to accurately determinate the hIgG levels in human serum. In this work, a label-free electrochemical immunosensor based on WSe 2 /rGO was developed to sensitively detect human immunoglobulin G. First, the flower-like transition metal dichalcogenides (TMDCs) Tungsten Diselenide (WSe 2 ) with large effective specific surface area and porous structure was synthesized by hydrothermal synthesis. As a bio-matrix, the flower-like WSe 2 efficiently increased the active sites for loading antibodies. Meanwhile, reduced graphene oxide (rGO) obtained by tannic acid reduction was used to improve the current response of the sensing interface. WSe 2 was combined with rGO and the electrochemical active surface area (ECSA) of the sensing interface was enlarged to 2.1 times that of GCE. Finally, the combination of flower-like WSe 2 and rGO broadened the detection range and reduced the detection limit of the sensing platform. The immunosensor exhibited a high sensitivity with a wide linear range of 0.01–1000 ng/mL and low detection limit of 4.72 pg/mL. The real sample analysis of hIgG were conducted under optimal conditions, and the spiked recovery rates were between 95.5 and 104.1%. Moreover, satisfactory results were obtained by testing the stability, specificity and reproducibility of the immunosensor. Therefore, it can be concluded that the as-proposed immunosensor has the application potential of clinical analyze of hIgG in human serum. Graphical abstract
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Peng Chai,Chunjia Luo,Jincui Gu,Fan Yu,Min Chao,Xi Chen,Luke Yan
Integrating photocatalytic degradation and membrane separation is a crucial approach to water purification . Here, inspired by Euplectella aspergillum, we presented an electrospinning fibrous membrane containing polyacrylonitrile (PAN), graphitic carbon nitride (g-C 3 N 4 ) particles, and polyvinylpyrrolidone (PVP). The g-C 3 N 4 particles undertook the task of photocatalytic degradation for various contaminants. The PVP molecules assumed the role of pore-forming agent for providing additional channels for high-throughput wastewater purification. Furthermore, the micro/nano porous structure of the PPAN@g-C 3 N 4 fibers promoted the exposure of the photocatalytic active center of the g-C 3 N 4 particles, improving the light absorption capacity and enhancing photocatalytic performance. Hence, the prepared PPAN@g-C 3 N 4 fibrous membrane possessed excellent separation properties for the oil/water mixture (53,555 ± 3241 L m −2 h −1 bar −1 ) and oil-in-water emulsion (103,689 ± 13,286 L m −2 h −1 bar −1 ), and maintained its initial separation performance after cyclic separation. Moreover, the membrane showed excellent photocatalytic performance for different pollutants, among which the photocatalytic efficiency of RhB , MB , and MG was about 100 %. After 7 consecutive photocatalytic degradation of RhB, the efficiency remained above 95 %. Meanwhile, the antibacterial efficiency was more than 87 %. The combination of high-throughput separation performance and excellent catalytic performance exemplifies its potential attractiveness for practical wastewater purification.
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