SOLAR ENERGY
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2024
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IF 6
Zhi-Ping Huang,Hui-Li,Wei-Ze Wang,Hu Li,Li-Mei Lin,Zhi-Gao Huang,Shui-Yuan Chen,Gui-Lin Chen
Sb 2 (S,Se) 3 is a promising photovoltaic material due to its tunable bandgap, high thermal stability, and low-cost production potential. However, films produced by close-spaced sublimation (CSS) often suffer from defects that reduce efficiency. In this work, lithium (Li) doping was introduced to improve crystal quality, carrier concentration, and conductivity. The lithium was incorporated into the sublimation source via molten salt treatment, resulting in a uniform Li-Sb 2 (S,Se) 3 thin film. The resulting ITO/CdS/Li-Sb 2 (S,Se) 3 /PbS/Carbon solar cell achieved a power conversion efficiency of 6.18%, a significant improvement over undoped devices. The study further investigates the optoelectronic properties, revealing that Li doping effectively reduces non-radiative recombination, improves carrier extraction, and increases the valence band maximum (VBM), optimizing energy level alignment for enhanced hole transport. Additionally, the improved surface conductivity and higher carrier concentration due to Li doping contributed to enhanced carrier transport and reduced recombination.This research demonstrates that alkali metal doping can enhance the optoelectronic properties of Sb 2 (S,Se) 3 films, providing a pathway for further efficiency improvements in antimony-based thin-film solar cells.
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Journal of Materials Chemistry C
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2025
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IF 5.1
Chang Zhang,Xin Zhang,Wei Wang,Hao Xue,Qian He,Fenglin Li,Xiaoli Wang,Qinghui Jin,Kun Zhou,Jiawen Jian
This paper presents an ammonia (NH3) fluorescent sensor based on the MAPbBr3 perovskite and the multifunctional organic material (R/S)-OBN-tCz. The incorporation of (R/S)-OBN-tCz enhances the sensor's photoluminescence (PL) intensity through Förster resonance energy transfer (FRET) and passivation effects, which consequently improves the sensitivity of the gas sensor. The MAPbBr3&(R/S)-OBN-tCz@PMMA nanofibers fabricated via electrospinning technology not only increase the specific surface area effectively, which is crucial for sensitivity improvement, but also strengthen the stability of the perovskite material under an air atmosphere. The experimental results demonstrate that the sensor maintains stable PL performance for up to 30 days in air and over 10 hours in water, while exhibiting rapid and reversible fluorescence response to NH3.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xinyi Zhang,Rongshuo Guo,Hongqing Wang,Zhijun Zhang,Yinxiang Chen,Ye Zhang
In aquatic environments, the coexistence and interaction of multiple the pollutants complicate remediation process. This study focuses on developing a defective-enriched S-scheme heterojunction of K 3 PW 12 O 40 @WS 2 (KPW@WS 2 ) with hollow structure for the simultaneous removal of tetracycline (TC) and hexavalent uranium (U(VI)) in wastewater. The internal electric field (IEF) within this heterojunction plays a crucial role in efficiently separating photo-generated carriers, creating high reduction and oxidation active sites. The band structure and optical properties suggest that WS 2 -Vs have a narrower band gap energy compared to conventional WS 2 , leading to improved charge carrier separation and transfer rates. Density functional theory (DFT) calculations support the reduced recombination of electron-hole pairs in WS 2 -Vs due to the presence of S vacancies. Experimental results reveal a synergistic effect between the removal of TC and U(VI), with a significant increase in the reaction rate constant for the reduction of U(VI) to 0.0426 min −1 , 1.6 times higher than in a single U(VI) reduction system. Additionally, the reaction rate constant for the oxidation of TC also rises from 0.0573 to 0.0729 min −1 . The study also delves into the photocatalytic mechanism, degradation pathways, and intermediate products. Overall, this research offers an innovative strategy for simultaneous pollutant removal and optimizing photocatalytic redox reactions to enhance solar energy utilization.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Ze Xu,Guodong Zhang,Rongzhi Wang,Guilin Zhang,Guanyu Chen,Huwei Bian,Tao Jiang,Yong Kong
Degradable chiral mesoporous silica nanoparticles (DCMSN) are synthesized for selective loading and controlled release of S-naproxen (S-NPX). Chiral silane coupling agent (APTES-L) and degradable silane coupling agent (APTES-CN) are synthesized, respectively, which are used for the synthesis of DCMSN. APTES-L endows the DCMSN with chirality, while APTES-CN endows the DCMSN with degradability. Owing to the same rotatory directions of DCMSN and S-NPX, the DCMSN can be used for the selective loading of S-NPX, and the higher selectivity of DCMSN toward S-NPX is further confirmed by the thermodynamic computations. Further, the S-NPX loaded DCMSN (DCMSN-S-NPX) is encapsulated in the hydrogels cross-linked by carboxymethyl chitosan (CMCS) and cystamine (Cys). The TEM characterization reveals that the DCMSN has a regular and spherical shape, and the BET analysis demonstrates that the DCMSN is a typical mesoporous material. The thermogravimetry reveals that the contents of the silane coupling agents in the DCMSN are about 23.9 %. The results of UV and circular dichroism (CD) spectra indicate a higher selectivity of DCMSN toward S-NPX. The release of S-NPX from the hydrogels is controlled by pH and glutathione (GSH), and the release of S-NPX follows a zero-order equation. Cytotoxicity assay indicates that the drug-free hydrogels have excellent biocompatibility.
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PubMed
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Materials Today Communications
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2024
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IF 3.7
Yufei An,Yiping Su,Gang Li,Shuoyang Liang,Yingying Cai,Ruiheng Zhang,Xuehua Shen,Feng Yan,Zuotai Zhang
CO 2 capture through mineral carbonation extends the applicability of carbon sequestration by enabling storage in various cementitious materials derived from solid wastes. Calcium-containing cementitious materials receive extensive attention due to their potential for carbon capture, however, the underlying mechanisms both decalcification and carbonation during composition-structure evolution remain to be fully elucidated. Herein, a mineral carbonation strategy was reported to enhance carbon uptake performance, depending on the evolution stage of calcium (alumino) silicate hydrates (C-(A-)S-H) gel induced by alkali activation. Sequential dynamic monitoring and experimental characterizations confirmed that the decalcification and carbonation processes are closely linked to Ca-bonding states within the C-(A-)S-H structure. The results indicate that the short chains of alumino-silicate and the majority of the weakly bonded Ca phases are more prone to carbonation. Estimation of carbonation capacities also revealed that samples with 3h-activation exhibit the highest carbonation capacities (80.5 %), showing the higher carbonate potential with free Ca and weakly bound Ca (e.g. Ca(OH) 2 and interlay Ca in tobermorite-like structure) than samples with more intralayer Ca. Our work can provide new insights into the understanding of alkali activation induced decalcification and the improvement on carbonation capacities in early-formed C-(A-)S-H analogues.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2024
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IF 5.4
Lin Wang,Yu Pang,Meihua Xin,Mingchun Li,Lulu Shi,Yangfan Mao
Chitosan exhibits good biocompatibility and some antibacterial activity , making it a popular choice in biomedicine, personal care products, and food packaging. Despite its advantages, the limited antibacterial effectiveness of chitosan hinders its widespread use. Introducing a six-membered heterocyclic structure through chemical modification can significantly enhance its antimicrobial properties and broaden its potential applications. In order to explore the effect of six-membered heterocyclic structure on the antibacterial and antibiofilm activities of chitosan. In this study, seven chitosan derivatives containing six-membered heterocyclics were prepared. They were characterized using Fourier transform infrared (FT-IR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, and elemental analysis . Cell viability assay showed that they were non-toxic. The antibacterial and antibiofilm activities against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) were evaluated. Our research findings demonstrate that increasing the hydrophobicity , alkalinity and charge density of the substitute groups improved the antibacterial and antibiofilm activities of chitosan. This study also offers valuable insights into the quantitative structure-activity relationships of chitosan derivatives in terms of antibacterial and antibiofilm activities.
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PubMed
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Hui Li,Rui Da,Li-Quan Yao,Hu Li,Peng Tang,Jin-Rui Cai,Li-Mei Lin,Shui-Yuan Chen,Dong Wei,Li-Ping Cai,Gui-Lin Chen
Sulfoselenide Sb 2 (S,Se) 3 , as a potential light-harvester, possesses a flexibly tunable bandgap of 1.1–1.7 eV to match solar radiation spectrum. However, the preparation of a homogenous Sb 2 (S,Se) 3 film is still challenging due to the different growth kinetics in sulfide and selenide compound, which consequentially leads to phase separation, lattice disorder and unfavored band level. This dilemma also occurs in the simple and well-established close space sublimation (CSS) method, and poses a devastating carrier recombination in Sb 2 (S,Se) 3 solar cells. Herein, alloyed powders of Sb 2 (S,Se) 3 are exquisitely synthesized by a thorough gas-solid reaction, delivering a uniform and single phase composition distribution as well as finely-tunable S/Se ratio. Compared with a physically mixed powder source (Sb 2 S 3 /Sb 2 Se 3 ), this alloyed Sb 2 (S,Se) 3 source allows for the fabrication of a homogeneous Sb 2 (S,Se) 3 thin film by CSS, rendering improved ( hk1 ) orientation, dense morphology, a more consistent longitudinal S/Se ratio, and enhanced energy level arrangement. These advancements contribute to enhance carrier transport and reduce carrier recombination. As a result, the efficiency of the solar cell is remarkably boosted from 2.59% to 5.46%, which is among of the highest PCE of full-inorganic Sb 2 (S,Se) 3 devices fabricated through the CSS method.
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CARBON
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2024
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IF 10.5
Tie Ma,Dan Li,ChenQi Wang,Ning Liu,Chao Wang,GuangPing Wu,Li Guo
Hard carbon materials are preferred as anode materials for sodium-ion batteries due to their abundance, low price, and environmental friendliness. However, doping-based modification usually induces low initial coulombic efficiency (ICE), which seriously affects the practical application of carbon materials. In this work, Fe-modified N/S co-doped porous carbon is prepared using the salt template method. Fe, N, and S are uniformly distributed on the porous carbon to form an interwoven network structure, providing abundant active sites. Moreover, during the electrochemical reaction, FeN x effectively catalyzes the generation of solid electrolyte interface (SEI) film, which reduces the consumption of Na + in the side reaction, leading to a high initial coulombic efficiency, and at the same time, the stabilized SEI film accelerates the diffusion of electrons and ions, effectively enhancing the multiplication rate performance. The NFSC exhibits a high specific capacity (371.3 mAh/g) by the co-coordination strategy and a high ICE (85.9 %). This study provides new ideas for research based on the modification of carbon materials.
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ACS Applied Nano Materials
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2024
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IF 5.3
Junchang Liu,Weijie Yuan,Minghui Zhu,Zhiheng Hu,Di Wu,Xue-Yang Ji,Dafeng Zhang,Xipeng Pu
The overuse of antibiotics has led to severe environmental pollution, thereby making it increasingly important to efficiently degrade them. To address this, a unique S-scheme heterojunction of the In2S3/In2O3 nanocomposite was successfully constructed using hydrothermal coupled with in situ formation in this work. The optimized In2S3/In2O3 nanocomposite exhibited a significant photocatalytic degradation of tetracycline (TC), achieving an 83% removal rate within 60 min, with enhancements of 1.78 times for In2S3 and 1.66 times for In2O3. Characterization, experimental results, and density functional theory (DFT) calculation collectively prove the efficient transfer of photoexcited carriers between In2O3 and In2S3, coupled with the successful construction of the S-scheme heterojunction with a well-arranged band structure. A potential pathway for developing photocatalysts with exceptional antibiotic removal capabilities has been provided by enhancing their reduction and oxidation capabilities of the S-scheme heterojunction through rational structural configuration.
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Journal of Cleaner Production
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2024
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IF 9.7
Chuantao Wang,Xiang Li,Xueting Lv,Xin Huang,Yueyue Zhao,Tiantian Deng,Jiale Zhang,Jun Wan,Yanzhong Zhen,Tuo Wang
The construction of S-scheme heterojunction with excellent redox ability holds promising prospects for photocatalytic environment remediation. However, the rationally design of the heterojunction interface to achieve efficient charge transfer still faces challenges. In this study, we fabricated a tight-contacted S-scheme heterojunction by in situ anchoring AgI nanoparticles onto WO 3 nanoplates. The significant difference in Fermi energy levels between WO 3 and AgI results in the formation of a space charge region around the interface and bending of the energy band, facilitating directional migration and spatial separation of charge carriers. This contributes to enhanced generation of superoxide radicals (•O 2 − ) and holes (h + ) active species, leading to a significant increase in chlortetracycline (CTC) degradation rate. The apparent rate constant for CTC removal using the WO 3 /AgI (WA-2) is approximately 15 times higher than that observed for pure WO 3 . Furthermore, WA-2 exhibits universal degradation effects on tetracycline (TC) and oxytetracycline (OTC). Molecular dynamics (MD) simulation reveals the synergistic adsorption effect of WO 3 and AgI on CTC and reactive oxygen species molecules. Based on Fukui function calculation of CTC molecules and degradation intermediates, liquid chromatography-mass spectrometry (LC-MS) analysis, photocatalytic degradation pathway over WO 3 /AgI was determined to be sequential demethylation followed by dechlorination and decarbonylation. These findings provide valuable insights into high-performance S-scheme heterojunctions interface design and elucidation of pollutant degradation mechanism.
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EUROPEAN POLYMER JOURNAL
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2024
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IF 5.8
Jingwei Jiang,Yunlong Sun,Zhipeng Wang
With the rapid growth of 5G communication technology, low-dielectric materials can decrease the loss of the signal during transmission. Hence, there is an urgent need to develop high-performance materials with low dielectric constant (D k ) and dielectric loss (D f ) at high frequency. In this study, we propose a strategy that combines bulk rigid quinoxaline structure and low polarizability trifluoromethyl group to prepare poly (aryl ether)s (PAEs) with low D k and D f at high frequencies. The effect of methyl substituents on the properties of PAEs was focuses on investigated. Accordingly, three difluoro-monomers containing quinoxaline structures were designed and prepared and novel quinoxaline-based PAEs with different numbers of methyl substituents were synthesized by nucleophilic condensation reactions with the bisphenol monomer hexafluorobisphenol A (BP6F). Test results that the resultant PAEs exhibited excellent thermal and solubility properties, with 5 % thermal decomposition temperatures ( T d5% ) in the range of 500−515 °C and glass transition temperatures ( T g ) reaching 225 °C. Furthermore, these PAE films show outstanding optical transparency, with cut-off wavelengths of 398−400 nm and above 87 % transmission at 800 nm. Most importantly, the novel PAE films possess ultra-low D k and D f , with the lowest values reaching 2.45 and 0.0024 at 10 GHz and maintain low water absorption (0.53–0.63 %). The excellent properties of novel quinoxaline-based PAEs provide its application potential in the field of high-frequency communications.
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Surfaces and Interfaces
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2024
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IF 5.7
Cijun Shuai,Gao Pan,Qi Zhong,Shuping Peng
Bacterial infections considerably limit the success of scaffold transplantation. CuO 2 may generate hydroxyl radicals through a self-cascade catalytic process, which is effective for sterilization. However, reducing CuO 2 -derived Cu + ions to Cu° can lead to a decline in catalytic activity. To overcome these limitations, we anchored CuO 2 onto MoS 2 to establish stable Cu-S-Mo interfacial sites. The CuO 2 /MoS 2 nanozyme was fabricated using a low-temperature co-precipitation technique and introduced into poly- l -lactic acid scaffolds using selective laser sintering. The Cu-S-Mo interfacial sites showed a triad of functions that synergistically enhanced catalytic performance. These sites stabilized the Cu atoms, augmented catalytic activity by facilitating efficient electron transfer through the Mo 4+ /Mo 6+ redox couple, and improved the conduction of heat derived from the photothermal response of MoS 2 to the Cu catalyst. The synergistic action of chemodynamic and photothermal therapy, mediated by the Cu-S-Mo sites, resulted in remarkable antibacterial efficacy, with 92.3 % and 93.5 % inhibition rates against Staphylococcus aureus and Escherichia coli , respectively. Experimental evidence and simulations demonstrated that Cu-S-Mo structure stabilized the Cu atoms and improved electron transfer via interatomic charge transfer. These results highlight the potential of the CuO 2 @MoS 2 /PLLA scaffold in eliminating bacterial infections.
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