Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 21
·9906-9914
·
IF 9.931
Sheng Liang,Yang Xia,Chu Liang,Yongping Gan,Hui Huang,Jun Zhang,Xinyong Tao,Wei Sun,Weiqiang Han,Wenkui Zhang
Lithium sulfide (Li2S) is considered as a promising lithium storage material because of its high theoretical specific capacity of 1166 mA h g−1. The electrochemical performance of Li2S can be remarkably improved by introducing carbon to form Li2S–carbon composites. However, the complex preparation process of Li2S–carbon composites limits their large-scale applications. Herein, we present a green and facile strategy to synthesize porous carbon-coated Li2S–carbon nanotube composites (Li2S@PC–CNT) by heating carbon disulfide (CS2) and the lithium hydride–CNT mixture at a temperature below 250 °C, which is the lowest temperature for in situ synthesis of Li2S–carbon composites reported till date. For the Li2S@PC–CNT composites, Li2S@PC particles are connected with neighboring particles through the 3D CNTs network skeleton. This unique nanoarchitecture not only prevents the loss of active materials and diffusion of polysulfides, but also significantly facilitates fast electron and ion transport. As a result, a high specific capacity (820 mA h g−1 at 0.1 A g−1 after 10 cycles) and a remarkable cycle life (502 mA h g−1 at 0.5 A g−1 after 300 cycles) are achieved. The rationally designed structure and superior electrochemical performance of the Li2S@PC–CNT composites will pave a new avenue for realizing high energy density of Li–S batteries.
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高影响因子
POLYMER
·
2026
·
IF 5.1
Yu Huang,Zhennan Wang,Guoping Zhu,Zongmin Zhu,Xuebao Lin
In this study, a novel DOPO-based phosphorus/nitrogen/sulfur-containing flame retardant, TPD, was successfully synthesized and incorporated into epoxy resin (EP) at a low loading of only 4 wt%. The results showed that EP/4% TPD achieved a UL-94 V-0 rating, and its limiting oxygen index (LOI) increased from 21.8% to 30.5%, demonstrating excellent flame-retardant efficiency. Cone calorimetry revealed that the peak heat release rate (pHRR), total heat release (THR), total smoke production (TSP), and peak CO 2 release were reduced by 29.2%, 37.5%, 19.8%, and 23.0%, respectively, compared with neat EP, indicating a reduced fire hazard. Meanwhile, the incorporation of TPD enhanced the tensile strength and impact strength of EP by 10.6% and 76.4%, respectively. Furthermore, EP/4% TPD exhibited outstanding ultraviolet shielding performance in the 200–420 nm range while maintaining a certain level of visible light transmittance, along with improved resistance to acid and alkali and enhanced electrical insulation properties. These results demonstrate that TPD is a highly efficient multifunctional additive that simultaneously provides flame retardancy, mechanical reinforcement and toughening, UV shielding, corrosion resistance, and improved electrical insulation, offering a promising new approach for the development of high-performance epoxy resin composites.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 14
·1082
·
IF 3.2
Pang Bo,Cui Yanqun,Yin Jing
As a fundamental element in integrated photonic systems, the functionality of polymer-based waveguide amplifiers is primarily determined by the optical properties of the active material. More precisely, the amplification bandwidth establishes the working spectral region of the photonic circuit. Consequently, developing gain media that feature both broad bandwidth and high gain has emerged as a critical challenge in the field. The performance of this gain medium is fundamentally determined by rare-earth-ion-doped crystals, as the emission spectrum of these crystals ultimately dictates the achievable gain bandwidth. In this study, Y 2 O 3 : Yb, Er, Ce crystals with emission peaks covering the entire S + C + L band were prepared. In Y₂O₃ crystals with low crystal field symmetry, the 4 I₁₃/₂ and 4 I₁₅/₂ levels of Er 3+ ions were observed to undergo severe splitting, which in turn allows for effective broadening of the operational bandwidth. Fluorescence analysis reveals that the broadband emission from Er 3+ ions stems from the pronounced energy level splitting caused by the crystal field effect. When irradiated with a 980 nm laser, the emitted peak coverage from these Y 2 O 3 : Yb, Er, Ce crystals spans the complete S + C + L spectral range, demonstrating broadband optical amplification properties. Incorporation of Ce 3+ substantially improved the emission strength within these crystals across the S + C + L spectral region. Given their remarkable broadband luminescence characteristics across the S + C + L spectral range, Y 2 O 3 : Yb, Er, Ce materials represent promising candidates for gain media in next-generation polymer-based optical amplifiers.
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INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Leyan Nian,Kui Wu,Guijie He,Zhihua Yang,Shilie Pan
In the exploration of new infrared nonlinear optical (IR NLO) materials, element substitution has been developed as an effective way to adjust the structural features and material performances. A series of new IR NLO materials have been discovered in the I–Ba–MIV–Q system (I = Li, Na, Cu, and Ag; MIV = Si, Ge, and Sn; Q = S and Se), and they undergo interesting structural transformation with different element substitution except Li analogues. Herein, we have successfully synthesized three selenides with different space groups (Ag2BaSiSe4: I4̅2m; Ag2BaGeSe4 and Ag2BaSnSe4: I222) in the above system and studied their properties through experimental and theoretical methods. Remarkably, the detailed analysis on the structural changes and properties comparison was also systematically investigated in the I–Ba–MIV–Q system and the results indicate that the distortion degrees of different IQ4 tetrahedra play the critical role to cause the structural transformation with the M or Q elements substitution. More importantly, we have also found that the structural changes have the close relationship with the distance d(I–I) between adjacent I cations in the I2BaSnSe4 system, which makes the four-membered rings formed by edge-sharing BaSe8 units change from the square to rhombus with the increase of d(I–I). The properties comparisons (band gap and NLO effect) in this system have been also systematically studied.
研究领域:
材料科学
·
无机化学
·
光学材料
·
固态化学
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高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Xinyu Shan,Zuoxing Guo,Yining Zou,Lijun Zhao
To meet practical application needs, high-mass-loading lithium–sulfur (Li–S) batteries are urgently needed for achieving good electrochemical performance. Here, unique three-dimensional (3D) reduced graphene oxide (rGO)-coated ultrathin zinc–cobalt oxide composite N-doped carbon self-supporting stratified porous nanosheet arrays, anchored on flexible carbon cloths (CCs) (rGO-S/ZnCo2O4@NC/CCs), are designed and chosen as independent cathodes. A lithium–sulfur battery using rGO-S/ZnCo2O4@NC/CC as the cathode exhibits a high capacity of around 1377.8 mAh g–1 and retains an outstanding capacity of around 1006.3 mAh g–1 after 700 cycles at 0.1 C with a sulfur loading of 2.2 mg cm–2. Moreover, even under a high sulfur load of 8.2 mg cm–2, a superior capacity of 735.9 mAh g–1 can be achieved at 0.1 C. In this work, a special function and a 3D self-supporting stratified porous nanostructure with a conductive rGO coating have been designed, which reasonably alleviate the “shuttle effect” of high-load Li–S batteries through the “internal and external double repair” action.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Berhanu Telay Mekonnen,Daniel Manaye Kabtamu,Sun-Tang Chang,Guan-Cheng Chen,Amil Aligayev,Francisco Javier Dominguez-Gutierrez,Yao-Ming Wang,Sheng-Yu Wang,Wenyi Huo,Chen-Hao Wang
Developing cost-effective, high-performance bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for advanced clean energy technologies. This work details Sn–Fe bimetallic nanoparticles anchored on S,N-codoped graphitic carbon nitride (C3N4)-derived tubular carbon (SnFe/SNC_T), which are synthesized via a facile pyrolysis method at 850 °C (SnFe/SNC_850). The optimized SnFe/SNC_850 catalyst, which is characterized by a distinct bamboo-like tubular morphology, demonstrates superior ORR activity with a half-wave potential (E1/2) of 0.86 V vs RHE in 0.1 M KOH, surpassing commercial Pt/C (0.82 V). Furthermore, it exhibits excellent OER performance, requiring only 340 mV overpotential to achieve 10 mA cm–2, and displays remarkable overall bifunctionality. When SnFe/SNC_850 is integrated into an anion exchange membrane fuel cell (AEMFC), it delivers a peak power density of 277 mW cm–2, significantly outperforming Pt/C-based cells (168 mW cm–2). The catalyst also demonstrates exceptional durability, with only 20 mV of E1/2 decay after 30,000 cycles, compared to 50 mV for Pt/C. This enhanced performance is attributed to the synergistic interplay between Fe–Nx/Fe–Sx active sites and intermetallic Fe3SnC/FeS domains. These findings establish SnFe/SNC_850 as a highly promising nonprecious-metal bifunctional electrocatalyst for practical energy-conversion applications, paving the way for sustainable clean-energy solutions.
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PubMed
高影响因子
WATER RESEARCH
·
2026
·
IF 12.8
Lumeng Jia,Wenchao Yu,Xiangting Hou,Mengxue Li,Qi Shi,Zhaoyong Bian,Hui Wang
Photoelectrocatalytic (PEC) in situ hydrogen peroxide (H 2 O 2 ) production offers a green strategy for activating singlet oxygen ( 1 O 2 ) and degrading refractory organic pollutants. However, it suffers from low cathode yield, sluggish anode kinetics, mass-transfer losses, and low selectivity for 1 O 2 . This study ingeniously designed an S-O double vacancy β-In 2 S 3 -Er/Yb@WO 3 -Ov S-type heterojunction full-spectrum photoanode, offered new perspectives on in situ oxygen reduction at the photoanode for H 2 O 2 generation, and presented a dual-electrode cooperative PEC system. In the experiment, double vacancies at the photoanode acted as electron traps, accumulating electrons. Meanwhile, an applied bias voltage, more electrons on the surface, and weakly acidic and oxygen-permeable conditions the electrons trapped by vacancies, together with conduction band electrons, were conducive to driving the in-situ two-electron oxygen reduction reaction to H 2 O 2 formation at the photoanode. O vacancies dominated interfacial adsorption and catalysis, while S vacancies served as electron traps for charge separation, forming a complementary synergy. Coupled with charge modulation at the S-scheme heterojunction interface, accelerating photogenerated carrier separation and preserved highly reactive holes, providing key conditions for 1 O 2 generation. β-In 2 S 3 -Er/Yb@WO 3 -Ov photoanode realized in-situ oxygen reduction reaction-induced H 2 O 2 production and cathodic H 2 O 2 activation simultaneously. Both routes yield ·OOH/·O 2 - intermediates, which were oxidized by holes to form 1 O 2 , thereby enabling efficient carbamazepine removal (98.4%, k app = 0.093 min -1 ), efficient 1 O 2 production (53.13 μmol L -1 min -1 ), and low energy consumption (0.155 kWh m -3 -log). This work presents an advanced PEC strategy for the synergistic synthesis of H 2 O 2 and 1 O 2 , offering a promising approach for high-efficiency environmental remediation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiang Li,Xueqian Wang,Langlang Wang,Li Yuan,Yixing Ma,Yibing Xie,Yiran Xiong,Ping Ning
The low S selectivity of catalysts for H 2 S removal significantly hinders its application in blast furnace gas desulfurization. In this study, Cu-based coconut shell biochar was modified with different types and contents of alkali species. The results showed that the S selectivity close to 100% was prolonged from 0 to 750 min. At the same time, the sulfur capacity was increased from 242.1 mg/g (before the modification) to 373.4 mg/g by using K 2 CO 3 -induced Cu-based biochar at 120 °C. In CO, H 2 O, and O 2 atmosphere, H 2 S was dissociated and oxidized to elemental S. Additionally, K 2 CO 3 exhibited an elemental S anchoring effect, making the S more stable at medium–high temperatures and weakening the reactivity of S with CO and ·O 2 – . Thus, less COS and SO 2 were generated. Moreover, the basic sites enhanced by K 2 CO 3 promoted the hydrolysis of COS to generate H 2 S, which entered the desulfurization cycle. K 2 CO 3 also showed a synergistic effect with the active components, generating more ·O 2 – to promote the oxygenation of H 2 S. The regeneration efficiency of the catalyst could be stabilized above 90%. These findings could provide guidance and reference for designing and applying desulfurization catalysts with high S selectivity and activity.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yu Jiang,Jia Wang,Bo Liu,Wei Jiang,Tianyu Zhou,Yunchao Ma,Guangbo Che,Chunbo Liu
Herein, a N,S,O-doped Co/CoO/Co 9 S 8 @carbon hybrid (Co/CoO/Co 9 S 8 @NSOC) has been constructed by calcinating a Co-based metal–organic framework (Co-MOF) with 4,4-bipyridine and 2,5-thiophenedicarboxylic acid as linkers. Co/CoO/Co 9 S 8 @NSOC exhibited a high and recycled catalytic efficiency for peroxymonosulfate (PMS) activation to degrade sulfamethoxazole (SMX, 20 mg/L) with a reaction rate of 1.31 min −1 , which was 5.2 times than that of Co-MOF. The catalytic behavior should be attributed to the rich active sites, lamellar morphology, superhydrophilicity, and magnetism. Furthermore, the Co/CoO/Co 9 S 8 @NSOC was immobilized on a filter membrane (CMFM) to adapt to the flowing system, which could recycle 20 times without losing activity. To employ in a large-scale static environment, the Co/CoO/Co 9 S 8 @NSOC was loaded on the commercial sponge (CoSPG). In a 50 L water tank, the CoSPG realized to decompose 160 mg/L SMX solution with 37 h and had long-term stability over 10 days. Notably, the PMS cost of treating one ton of wastewater is only $0.34, indicating a huge industrial application value.
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Foods
·
2022
·Vol. 11
·期 9
·1348
·
IF 5.561
Ying Guo,Guanqing Yuan,Xuelian Hu,Jinni Zhang,Guozhen Fang
In this study, a novel fluorescent molecularly imprinted nanosensor (N, S-GQDs@ZIF-8@MIP) based on the nitrogen and sulfur co-doped graphene quantum dots decorated zeolitic imidazolate framework-8 was constructed for the detection of octopamine (OA). Herein, ZIF-8 with a large surface area was introduced as a supporter of the sensing system, which effectively shortened the response time of the sensor. Meanwhile, high green luminescent N, S-GQDs and a maximum emission wavelength of 520 nm under 460 nm excitation and a 12.5% quantum yield were modified on the surface of ZIF-8 as a signal tag that can convert the interactions between the sensor and OA into detectable fluorescent signals. Finally, N, S-GQDs@ZIF-8@MIP was acquired through the surface molecular imprinting method. Due to the synergy of N, S-GQDs, ZIF-8, and MIP, the obtained sensor not only demonstrated higher selectivity and sensitivity than N, S-GQDs@ZIF-8@NIP, but also displayed faster fluorescence response than N, S-GQDs@MIP. Under optimal conditions, the developed sensor presented a favorable linear relationship in the range of 0.1–10 mg L−1with a detection limit of 0.062 mg L−1. Additionally, the proposed N, S-GQDs@ZIF-8@MIP strategy was effectively applied to the detection of OA in fermented samples, and the obtained results had a satisfactory correlation with those of HPLC.Keywords:N/S co-doped graphene quantum dots;zeolitic imidazolate framework-8;molecularly imprinted polymer;octopamine;fluorescent sensor
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Weiying Li,Li Liang,Yue Li,Yu Tian,Jiping Chen,Sheng Chen,Junpeng Zhang
Recently, EDTA-chelated Cd II (Cd II -EDTA) was effectively removed by sulfidated nanoscale zero-valent iron (S-nZVI). However, few studies have been performed to investigate the influence of co-existing ions and emerging contaminants (such as microplastics) on the performance of S-nZVI toward Cd II -EDTA, which is vital for the application of S-nZVI in practical wastewater treatment. In this study, the individual effects of different co-existing ions (NO 3 − , SO 4 2− , PO 4 3− , Mg 2+ , Cu 2+ , and Zn 2+ ) and polystyrene (PS) microplastics with different concentrations on the removal of Cd II -EDTA by S-nZVI were systematically investigated. The removal capacity of S-nZVI toward Cd II -EDTA fell in the range of 579.3–644.7, 612.3–670.2, 607.4–691.3, 533.3–623.6, 79.9–545.3, 544.3–631.7, and 568.6–663.8 mg/g for the presence of NO 3 − , SO 4 2− , PO 4 3− , Mg 2+ , Cu 2+ , Zn 2+ , and PS microplastics over the concentration range of 10.0–150.0 mg/L, respectively, which were all smaller than that of the system of Cd II -EDTA alone (746.6 mg/g), indicating that all of the investigated co-existing substances showed inhibitory effects on Cd II -EDTA removal. As for NO 3 − , SO 4 2− , or Mg 2+ -containing system, the inhibitory effect was ascribed to the influence of S-nZVI corrosion rate; As for PO 4 3− , Mg 2+ , Cu 2+ , Zn 2+ , or PS microplastics-containing system, the negative effect was caused by changing the corrosion of S-nZVI and occupying the reactive sites at the surface of S-nZVI. The final corrosion products of S-nZVI under different reaction conditions were strongly dependent on the species and concentration of co-existing substance with the combinations of γ-FeOOH, α-Fe 2 O 3 , FeO, or β-FeOOH as the dominant corrosion products.
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Food & Function
·
2022
·Vol. 13
·期 4
·2200-2215
·
IF 6.317
Yi Wang,Jingwen Xu,Yihai Wang,Limin Xiang,Xiangjiu He
Multidrug resistance (MDR) is a major cause of chemotherapy failure. Adriamycin (ADR) has been widely used to treat cancer, however, as a substrate of the adenosine triphosphate binding cassette (ABC) transporter, it is easy to develop drug resistance during the treatment. Here, we demonstrated that steroidal saponin S-20 isolated from the berries of black nightshade has comparable cytotoxicity in ADR-sensitive and resistant K562 cell lines. Autophagy is generally considered to be a protective mechanism to mediate MDR during treatment. However, we found that S-20-induced cell death in K562/ADR is associated with autophagy. We further explored the underlying mechanisms and found that S-20 induces caspase-dependent apoptosis in ADR-sensitive and resistant K562 cell lines. Most importantly, S-20-induced autophagy activates the ERK pathway and then inhibits the expression of drug resistance protein, which is the main reason to overcome K562/ADR resistance, rather than apoptosis. Taken together, our findings emphasize that S-20 exerts anti-multidrug resistance activity in K562/ADR cells through autophagic cell death and ERK activation, which may be considered as an effective strategy.
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PubMed
高影响因子
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