APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Hao Wang,Nanping Deng,Yayi Lu,Yongbing Jin,Geng Li,Bowen Cheng,Weimin Kang
In this study, the CoP-Co 2 P heterojunction nanoparticles embedded in N-doping porous carbon nanofibers (CoP-Co 2 P/NPCNFs) are designed and prepared. The highly conductive grid of NPCNFs can physically confining lithium polysulfide (LiPS) and provide facilitated channels for Li + transport. Furthermore, due to the spontaneous built-in electric field (BIEF) based on at the formed heterogeneous interfaces of CoP-Co 2 P, the heterojunction can significantly catalyze bi-directional conversion of LiPS and chemically adsorb LiPS which confirmed by the DFT calculations, suppressing the “shuttle effect” of LiPS. Thus, the Li-S batteries with the CoP-Co 2 P/NPCNFs modified separators exhibit a high initial specific capacity of 1322.86 mAh g −1 at 1 mA cm −2 and stable 695 cycles with a low decay rate (0.069 %). More importantly, the assembled pouch cell also can run with ultra-low specific capacity decay rate. Additionally, the pouch battery can also be applied to the operation of fans, temperature and humidity meters, mobile phone charging, etc.
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JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Yufeng Liang,Ziqiang Liu,Kejing Lin,Weimin Yin,Yuanqin Zhu
Aromatic hydrocarbon proton exchange membranes (PEMs) hold promises as alternatives to Nafion membranes. Here we report on the design and preparation of graft-type PEMs based on poly ( m -terphenyl fluorenyl)s (TSPHFTP-x) with a featured structure of rigid all-carbon aromatic backbones and long flexible side chains with dual 1,2,3-triazole and disulfonated units. Benefiting from the well-designed structure, the TSPHFTP-x membranes exhibit a well-defined bicontinuous microphase separation structure, thus achieving high proton conductivities up to 175.6 mS cm −1 (25 °C) and 303.0 mS cm −1 (80 °C) under 100 % relative humidity, and excellent dimensional stability with swelling ratio below 24 %. Meanwhile, these membranes show good oxidative stability and mechanical properties. In addition, the H 2 –O 2 fuel cell assembled with the TSPHFTP-50 PEM shows a peak power density of 1013 mW cm −2 at 60 °C. This study provides a valuable insight into the design of polymer architectures for high-performance hydrocarbon PEMs.
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ANALYTICA CHIMICA ACTA
·
2024
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IF 5.7
Dapeng Xu,Yanning Zheng,Bimei Xie,Youquan Zhang,Zhangfa Tong,Jianhua Sun,Lixia Sun,Guangzhi Zhou,Dankui Liao
Background With the rapid development of industrialization, the excessive emission of S 2− have become increasingly serious, leading to a surge in the content of S 2− in nature. Rapid and accurate detection of S 2− contamination in natural adaptogens is crucial for food safety. Annually, discarded eggshell waste, rich in organic and inorganic materials, poses environmental risks if landfilled. Utilizing waste eggshell membrane biomass for S 2− detection is cost-effective, yet designing biochar materials for sensors requires balancing catalytic enhancement and anti-interference capabilities. Improving the catalytic performance of biochar for colorimetric S 2− detection without metal ion interference presents a challenging issue. Results We first modified biochar (EBc) derived from waste eggshell membranes using a combination of thiourea and ZnS nanoparticles, fabricating ZnS-decorated, S–N co-doped biochar (ZnS-SN-EBc) nanozymes, which were applied for the colorimetric assay detection of S 2− contamination. The addition of thiourea significantly increases the proportion of pyridinic-N in biochar, enhancing the peroxidase-like activity of the nanozyme. The growth of ZnS nanoparticles on the biochar not only enhances the catalytic performance by increasing the S content but also reduces the content of oxidized S, thereby improving resistance to interference. The detection range for S 2− was expanded from 0.1 to 45 μM for EBc to 0.05–225 μM for ZnS-SN-EBc, and the limit of detection improved to 0.0397 μM. Additionally, ZnS-SN-EBc significantly enhanced metal ion interference resistance. S 2− detection in five types of adaptogenic herbs verified the accuracy and practicality of the colorimetric assay, with recovery rates comparable to national standards. Significance We innovatively repurposed waste eggshell membranes to develop a selective and catalytic peroxidase-like nanozyme, ZnS-decorated S–N co-doped biochar (ZnS-SN-EBc). The developed colorimetric assay utilizing ZnS-SN-EBc demonstrates significant potential for the detection of sulfur ions in adaptogenic herbs, thus contributing to both waste resource utilization and the advancement of food safety detection technologies.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
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IF 5.8
Xiao-hu Ma,Si-yuan He,Zhe-rui Zhang,Zhe Meng
Persistent light-emitting materials (PLMs), which have the potential to store and release light energy after light irradiation, are receiving increasing attention for their role in prolonging the lifetime of photogenerated electrons for the development of photocatalysts with round-the-clock applications. In this paper, a double S-scheme Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ /ZnIn 2 S 4 /UiO-66-NH 2 (SZU) heterojunction with round-the-clock catalytic activity was prepared by hydrothermal self-assembly method. The photocatalytic performance of the SZU heterojunction for RhB(MB) degradation was significantly improved compared with the pristine ZnIn 2 S 4 and UiO-66-NH 2 . The SZU heterojunction has excellent catalytic degradation performance for RhB (MB), and the removal rate of RhB (MB) reaches 72.2 % (81.7 %) after visible light irradiation for 40 (60) minutes. After the end of light, the total removal rate of RhB (MB) reached 86.7 % (96.8 %) when the catalysis continued for several hours under dark conditions, which was 14 % and 15 % higher than that under visible light irradiation, respectively. Based on the characteristics of SMS photoluminescence, combined with a large number of photocatalytic experiments, The sustained photocatalytic activity was enhanced under both daytime and darkness conditions, not only because of the production of SZU complexes, which prolonged the visible light response of ZnIn 2 S 4 , but also because of the construction of double S-scheme heterojunctions, which facilitates the light storage capacity, charge transfer, and the separation of photo-induced charge carriers and effectively promoted the photocatalytic activity of the photocatalysts. This work contributes to a deeper understanding of the design of round-the-clock photocatalysts, and provides a useful exploration for the practical application of photocatalytic technology.
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ACTA PHYSICO-CHIMICA SINICA
·
2024
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IF 10.8
Changjun You,Chunchun Wang,Mingjie Cai,Yanping Liu,Baikang Zhu,Shijie Li
Photocatalytic wastewater decontamination techniques hold eminent promise in mitigating environmental deterioration, yet the lack of distinctive photocatalysts prevents their further large-scale application. Herein, an S-scheme heterojunction photocatalyst BiOBr/C 3 N 5 (BBN) was fabricated for efficiently dislodging micropollutants under visible light. Among the BBN samples, the optimal BBN-2 demonstrated exceptional activity in photocatalytic TC removal with a rate constant of 0.0139 min ‒1 , which surpassed that of pure BiOBr and C 3 N 5 by 0.6 and 2.8 times, respectively. The spatially segregated photoredox sites and efficient photo-carrier separation propelled by an internal electric field are found to play a cardinal role in promoting photoreaction kinetics. Moreover, BBN-2 exhibited remarkable resistance to environmental interference and stability, retaining a high activity level after five runs. Through active radical detection, •O 2 ‒ , h + and •OH were identified as the primary active species in the photocatalytic reaction process. This research would encourage the exploration of C 3 N 5 -based photocatalysts for environmental protection. Download: Download high-res image (91KB) Download: Download full-size image
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SEMICONDUCTOR SCIENCE AND TECHNOLOGY
·
2025
·Vol. 40
·期 3
·035006
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IF 2.1
Xingyu Zhang,Lingling Wang,Yawei Wang,Xiangyang Zhao,Rong Fang,Rui Guo,Yue Zhou,Xintong Zhang,Yichun Liu
Modifying the back contact interface plays a key role in improving the efficiency of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. Aiming at the phase decomposition and carrier recombination issues in the CZTSSe/Mo back contact interface, an ultra-thin Mg(OH)2 intermediate layer was introduced between the Mo substrate and the CZTSSe absorber layer. The Mg(OH)2 intermediate layer effectively suppressed the interface phase decomposition reactions and inhibited the generation of interface secondary phases. Meanwhile, during the high-temperature selenization process, the Mg2+ doped into CZTSSe at the back contact interface, reducing the defects and band offset at the CZTSSe/Mo interface. The performance of the device was improved, with a significant increase in efficiency compared to the control device. This work highlights the modification effect of Mg(OH)2 for improving back contact and also provides an easy-handling method to achieve high-performance CZTSSe solar cells.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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IF 6.3
Kaijia Wang,Ziwu Liu,Shiheng Mu,Huanqiang Shi,Mengmeng Zhou,Chao Yuan,Shijian Lu,Zhonghai Ni,Guoliang Tian
As a remarkable alternative anode to commercial graphite for the next-generation high-performance lithium-ion batteries (LIBs), silicon (Si) has attracted tremendous attention due to its high specific capacity. However, the enormous volume expansions/contractions during the charge/discharge limited its practical application in LIBs greatly. To solve these issues, herein, we fabricated a low-cost FeSi intermetallic compound (FeSi 2 ) by the ball milling with photovoltaic industrial waste micron-sized Si and Fe powders as raw materials and encapsulated it by N, S, O-doped mesoporous carbon with polyvinylpyrrolidone as C, N, O precursor and (NH 4 ) 2 SO 4 as template and pore-introducing agent. Owing to the presence of FeSi 2 , abundant meso-pores for mitigating Si and FeSi 2 expansion and the N, S, O-doped mesoporous carbon for facilitating lithium-ion transport and electron conduction, one as-prepared FeSi 2 /N, S, O-doped mesoporous carbon composite anode (FeSiA 1 @C) showed a high specific capacity of 401.7 mAh g −1 even at 1.0 A g −1 after 1600 cycles. More impressively, the assembled LiFePO 4 || 20 % FeSiA 1 @C/80 % commercial graphite full cell presented a high energy density of ca. 312.0 Wh kg −1 and a capacity retention of ca. 80 % after 500 cycles, demonstrating a promising practical applicability of FeSiA 1 @C anode, and showing a new way for the high-value utilization of industrial waste micron-sized Si for LIBs.
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ENERGY & FUELS
·
2024
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IF 5.2
Lan Li,Tingxue Fang,Fuming Lai,Xinyue Li,Tingting Qu,Lin Wang,Xiaoshi Lang,Kedi Cai
Vanadium pentoxide (V2O5) is regarded as a promising sulfur-wrapped matrix for high-performance lithium–sulfur batteries, owing to its desirable structural and functional characteristics. In this paper, a large number of defective sites arise in the vanadium pentoxide structure via a codecoration strategy of the V, O sites, which is more beneficial to improving the electroconductivity and allows for the uniform loading of sulfur on the surface, thereby reducing the polarization resistance and elevating the kinetic rates during the electrochemical reaction. Electrochemical test results indicate that Mg2+/S-codecorated V2O5/S composite cathodes have 1131.15, 942.39, and 804.71 mAh·g–1 of discharge-specific capacities at 0.1, 0.2, and 0.5 C rates, respectively, with the lowest charge/discharge plateau voltage difference, and the capacity retention rate after 140 cycles can be 57.95%. Besides that, the multidefect V2O5 can effectively promote the adsorption strength of lithium polysulfide and catalytically accelerate the rate of liquid-phase conversion between lithium polysulfide so as to achieve the stable electrochemical properties for sulfur composite cathodes.
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CHINESE JOURNAL OF CHEMISTRY
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2024
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IF 5.5
Yuhang Qian,Xinye Liu,Xiangjun Zheng,Zilong Yang,Yanjie Yu,Fei Gao,Xingmei Guo,Yuanjun Liu,Xuecheng Cao,Ruihua Guo,Junhao Zhang
Comprehensive Summary Facile mass transport channel and accessible active sites are crucial for binder-free air electrode catalysts in rechargeable flexible zinc-air battery (ZAB). Herein, a ZnS/NH 3 dual-assisted pyrolysis strategy is proposed to prepare N/S-doped hierarchical porous bamboo carbon cloth (HP-NS-BCC) as binder-free air electrode catalyst for ZAB. BCC fabric with abundant micropores is firstly used as flexible carbon support to facilitate the heteroatom-doping and construct the hierarchical porous structure. ZnS nanospheres and NH 3 activization together facilitate the electronic modulation of carbon matrix by N/S-doping and optimize the macro/meso/micropores structure of carbon fibers. Benefiting from the highly-exposed N/S-induced sites with enhanced intrinsic activity, the optimized mass transport of biocarbon fibers, as well as the ultra-large specific surface area of 2436.1 m 2 ·g –1 , the resultant HP-NS-BCC catalyst exhibits improved kinetics for oxygen reduction/evolution reaction. When applied to rechargeable aqueous ZABs, it achieves a significant peak power density of 249.1 mW·cm −2 . As binder-free air electrode catalyst, the flexible ZAB also displays stable cycling over 500 cycles with a minimal voltage gap of 0.42 V, showcasing promising applications in flexible electronic devices.
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Nanomaterials
·
2024
·Vol. 14
·期 14
·1189
·
IF 4.4
Jian Yu,Zhaokang Zheng,Aiwu Wang,Muhammad Humayun,Yasser A. Attia
Molybdenum trioxide (MoO3) is an attractive semiconductor. Thus, bandgap engineering toward photoelectronic applications is appealing yet not well studied. Here, we report the incorporation of sulfur atoms into MoO3, using sulfur powder as a source of sulfur, via a self-developed hydrothermal synthesis approach. The formation of Mo-S bonds in the MoO3material with the synergistic effect of sulfur doping and oxygen vacancies (designated as S-MoO3−x) is confirmed using Fourier-transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR). The bandgap is tuned from 2.68 eV to 2.57 eV upon sulfur doping, as confirmed by UV-VIS DRS spectra. Some MoS2phase is identified with sulfur doping by referring to the photoluminescence (PL) spectra and electrochemical impedance spectroscopy (EIS), allowing significantly improved charge carrier separation and electron transfer efficiency. Therefore, the as-prepared S-MoO3−xdelivers a sensitive photocurrent response and splendid cycling stability. This study on the synergistic effect of sulfur doping and oxygen vacancies provides key insights into the impact of doping strategies on MoO3performance, paving new pathways for its optimization and development in relevant fields.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yachao Xu,Zhong Zhou,Peng Yu,Huiquan Gu,Zixu Zhang,Ying Wang
Efficient reduction of U(VI) to U(IV) during seawater uranium extraction remains a challenge. Here, cerium dioxide quantum dots were bonded to the surface of indium zinc sulfide (ZIS) to form ZIS composite cerium dioxide quantum dots (ZIS/QDs-Ce). The oxygen vacancies are able to activate the Zn-O bonds at the ZIS and QDs-Ce interfaces, thus enabling the constructed S-scheme heterojunction to show great potential in facilitating the separation and transfer of photogenerated carriers. ZIS/QDs-Ce exhibited high anti-bio-pollution activity by generating biotoxic free radical reactive oxygen species (ROS). The photo-induced reduction of uranium by ZIS/QDs-Ce in 10 ppm uranium spiked simulated seawater reached 99.6 %. Oxygen vacancies cause distortions in the crystal field, and the Zn-O bond activation process triggers the movement of ZIS/QDs-Ce from the singlet low-spin state to the stable triplet state, resulting in free-carrier trapping centers and optimized electronic energy band structures. ZIS/QD-Ce has superior uranium extraction capabilities and is highly recommended for uranium extraction from seawater.
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JOURNAL OF COORDINATION CHEMISTRY
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2018
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IF 1.703
Guo-Cheng Liu,Yan Li,Ying Xiong,Xiang-Xiang Liu,Qiao-Min Li,Ju-Wen Zhang,Hong-Yan Lin,Xiao-Wu Li
To investigate the effect of the spacers of S-/O-bridged dipyridylamides on the structures of Co(II)/Zn(II) complexes, [Co(L1)(chda)]·1.5H2O (CP1), [Co(L2)(chda)] (CP2), [Zn(L1)(hip)]·DMA·2H2O (CP3), and [Zn(L2)(hip)]·2.8H2O (CP4) [L1 = N,N′-bis(pyridine-3-yl)thiophene-2,5-dicarboxamide, H2chda = trans-1,4-cyclohexanedicarboxylic acid, L2 = N,N′-bis(pyridine-3-yl)-4,4′-oxybis(benzoic) dicarboxamide, H2hip = 5-hydroxyisophthalic acid, DMA = N,N-dimethylacetamide], have been solvothermally synthesized. X-ray single-crystal diffraction shows that CP1 is a 2-D 3,5-connected network based on Co-L1 linear chains and (Co-chda)2 double chains. CP2 features a 1-D structure derived from 1-D wave-like (Co-chda)2 double chains decorated by terminal L2 ligands. CP3 and CP4 show wave-like (4,4) networks constructed by 1-D Zn-L1 zigzag and Zn-hip zigzag (for CP3)/linear (for CP4) chains. The effect of the spacers of S-/O-bridged dipyridylamides on the structures of the title complexes was discussed. Electrochemical behaviors of CP1–CP2 and solid-state luminescent properties of CP3–CP4 were studied. The luminescence investigations show that CP3 and CP4 are recycled fluorescent probes for environmentally relevant Fe3+ ions. The photocatalytic properties for the degradation of methylene blue (MB) under ultraviolet light irradiation of CP3–CP4 and the recyclable materials after fluorescent sensing Fe3+ ions (named CP3@Fe3+ and CP4@Fe3+) have also been investigated.
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