ChemSusChem
·
2025
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IF 6.6
Umar Farooq,Boyang Han,Usman Ali Shah,Fa Yang,Sheng Li,Yanping Song,Ali Hassan,Zhengquan Li,Jin Wang
The efficiency of earth-abundant kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cells has been lagging behind the Shockley-Queisser limit primarily due to the presence of deep-level defects. These deep-level defects cause critical issues such as short carrier diffusion length, significant band tailing, and a large open-circuit voltage (VOC) deficit, ultimately leading to low device efficiency. To address these issues, we propose a post-fabrication defect healing strategy by dip-coating the CZTSSe film in dimethylformamide (DMF) solvent. Immersing the absorber layer in DMF (a polar solvent), neutralizes CuSn antisite defects through chemical bonding and facilitates the formation of a dense, smooth CZTSSe film with larger grain size. Deep-level transient spectroscopy revealed a remarkable increase in carrier diffusion length from 93 nm (control device) to 142 nm (champion device), confirming the beneficial effect of solvent-assisted post-treatment on mitigating CuSn antisite defects. The reduction in defect densities led to a decrease in VOC deficit by up to 289 mV, accompanied by an increased champion device efficiency of 11.4%. This work highlights the huge potential of the DMF post-treatment strategy for defect healing in CZTSSe solar cells.
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Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 37
·15051-15057
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IF 5.7
Yaling Wang,Genghong Huang,Zishan Yan,Guangqun Cao,Wenjing Zheng,Shengliang Hu,Bin Liu,Yongzhen Yang
Multicolor-emissive carbon dots (ME-CDs) have been extensively utilized in various fields such as optoelectronic devices, bioimaging, and sensing due to their tunable luminescence properties, solubility, stability, and biocompatibility. However, achieving ME-CDs in a straightforward manner remains a critical bottleneck hindering their wider industrial application. Herein, we report a facile method to prepare ME-CDs using p-phenylenediamine and urea as precursors by changing the type of reaction solvent. Specifically, when the solvents are formamide, deionized water, dimethylformamide, and ethanol, the fluorescence colors are blue, green, yellow, and red, respectively, covering the entire visible light range. The absolute fluorescence quantum yields and lifetimes are 63.02%/1.6 ns, 15.17%/3.4 ns, 16.82%/7.7 ns, and 17.81%/18.8 ns, respectively. The structure and photophysical properties of ME-CDs indicate that the emission of ME-CDs originates from different photoluminescence centers, namely clusteroluminescence, (n, π*) transition of heteroatom groups and (π, π*) transition of large π-conjugated structures. Furthermore, it is demonstrated that ME-CDs can be used as phosphors to fabricate multicolor light-emitting devices (LEDs). This study offers a simple and low-cost method to prepare ME-CDs and employ them as phosphors for LEDs.
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INDUSTRIAL LUBRICATION AND TRIBOLOGY
·
2024
·Vol. 76
·期 1
·70-80
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IF 1.5
Zhicai Du,Qiang He,Hengcheng Wan,Lei Zhang,Zehua Xu,Yuan Xu,Guotao Li
PurposeThis paper aims to improve the tribological properties of lithium complex greases using nanoparticles to investigate the tribological behavior of single additives (nano-TiO2or nano-CeO2) and composite additives (nano-TiO2–CeO2) in lithium complex greases and to analyze the mechanism of their influence using a variety of characterization tools.Design/methodology/approachThe morphology and microstructure of the nanoparticles were characterized by scanning electron microscopy and an X-ray diffractometer. The tribological properties of different nanoparticles, as well as compounded nanoparticles as greases, were evaluated. Average friction coefficients and wear diameters were analyzed. Scanning electron microscopy and three-dimensional topography were used to analyze the surface topography of worn steel balls. The elements present on the worn steel balls’ surface were analyzed using energy-dispersive spectroscopy and X-ray photoelectron spectroscopy.FindingsThe results showed that the coefficient of friction (COF) of grease with all three nanoparticles added was low. The grease-containing composite nanoparticles exhibited a lower COF and superior anti-wear properties. The sample displayed its optimal tribological performance when the ratio of TiO2to CeO2was 6:4, resulting in a 30.5% reduction in the COF and a 29.2% decrease in wear spot diameter compared to the original grease. Additionally, the roughness of the worn spot surface and the maximum depth of the wear mark were significantly reduced.Originality/valueThe main innovation of this study is the first mixing of nano-TiO2and nano-CeO2with different sizes and properties as compound lithium grease additives to significantly enhance the anti-wear and friction reduction properties of this grease. The results of friction experiments with a single additive are used as a basis to explore the synergistic lubrication mechanism of the compounded nanoparticles. This innovative approach provides a new reference and direction for future research and development of grease additives.Peer reviewThe peer review history for this article is available at:https://publons.com/publon/10.1108/ILT-09-2023-0291/
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jintao Zhang,Jin Sun,Xiaohong Zhou,Rongxian Ou,Lichao Sun,Chuigen Guo,Qi Fan,Zhenzhong Gao
Isocyanate-free polyurethane adhesives have attracted considerable attention as a promising environmentally friendly alternative. However, their progress has been hindered by insufficient bonding performance and weak solvent resistance, as well as the laborious synthesis processes involved. Herein, we successfully synthesized a high-performance lignin-based non-isocyanate adhesives (LNIPUs-G) through a one-pot strategy that combines the polycondensation of carbonate groups with polyether amines and aldehyde-amine chemistry. The former aspect circumvents the limitations associated with cyclic carbonate polyaddition while providing a molecular composition containing both rigid and flexible segments along with a high-density polar groups. Concurrently, the rapid hyperbranching process in the latter aspect significantly contributes to achieving a robust crosslinked network. As a result, the LNIPUs-G demonstrates exceptional resistance to boiling water with bond strengths of up to 1.32 MPa when applied to plywood, surpassing previously reported bio-based adhesives. Moreover, the adhesive exhibits remarkable versatility across a wide range of substrates including steel, iron, copper, carbon fiber reinforced composites, ceramics, aluminum, wood, and glass. Additionally, the adhesive has excellent resistance to an extensive range of organic solvents. Life cycle assessment (LCA) results demonstrate that the high-performance and cost-effective LNIPUs-G is expected to disrupt the dominance of bulk formaldehyde- and isocyanate-based adhesives industry.
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Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Huawei Li,Miao He,Senyao Meng,Ping Wang,Cheng Yang,Jiasai Yao,Zikang Hu,Zhenxing Li
The removal of acetylene (C2H2) impurities from ethylene (C2H4) is a critical step in the production of high-purity C2H4. Due to its low reaction temperature, low energy consumption and high selectivity for C2H4, the electrocatalytic semi-hydrogenation of C2H2 is an ideal method for removing C2H2. Herein, ultrathin two-dimensional (2D) mesoporous holmium oxide nanosheet-stabilized copper nanoparticles (Cu/Ho2O3) for stable and efficient electrocatalytic semi-hydrogenation of C2H2 were prepared through a simple and one-step high-temperature calcination-reduction method. The ultra-thin two-dimensional mesoporous structure of holmium oxide creates abundant coordination defects, improving the faradaic efficiency and durability of copper nanoparticles for catalyzing the semi-hydrogenation of C2H2. The as-prepared Cu/Ho2O3 achieved a C2H4 selectivity of 99.6% and a faradaic efficiency of 98.1% because the presence of oxygen vacancies is conducive to forming electron-rich Cu nanoparticles, thereby promoting the adsorption of electrophilic C2H2 and the desorption of nucleophilic C2H4. Meanwhile, the holmium oxide nanosheet with unsaturated coordination sites can stabilize the Cu nanoparticles, and the faradaic efficiency and current density remain stable for more than 600 minutes. This work offers a promising design strategy for a stable and efficient electrocatalyst for the semi-hydrogenation of C2H2 to C2H4.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-14
·
IF 15.7
Fan Rong,Guan Zeyuan,Zhou Guanghong,Yang Xi,Zhang Fei,Wu Menglong,Wang Xuecui,Liu Jian,Chen Pei,Liu Yanjun,Zhang Delin,Yin Ping,Yan Junjie
Amylopectin, the primary form of starch in plant leaves, seeds and tubers, features a tree-like architecture with branched glucose chains. Excess branches result in the formation of soluble phytoglycogen instead of starch granules. In higher plants and green algae, the debranching enzyme isoamylase ISA1 forms either homomultimer or hetero-multimer with ISA2 to facilitate branch trimming and starch granule formation, but the molecular basis remains largely unknown. In this study, we reconstitute the rice OsISA1-ISA2 complex in vitro and determine the cryo-EM structures of the OsISA1 homodimer, as well as the malto-oligosaccharide (MOS)-free and MOS-bound OsISA1-ISA2 heterocomplex. The OsISA1 dimer shows a tail-to-tail rod-like architecture, whereas the OsISA1-ISA2 complex mainly exhibits as a trimer, with OsISA2 flanking on the N-terminal segments of the dimeric OsISA1. Combined with comprehensive biochemical analyses, these structural data elucidate the organization of the ISA1-ISA2 heterocomplex in higher plants and demonstrate how ISA1 and ISA2 cooperate during amylopectin biosynthesis.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Weihua Zou,Wenhui Wang,Xinze Liu,Naike Zou,Zhangheng Wang,Delin Sun
Thermochromic wood-based phase change material (TWPCM) is a temperature-responsive, smart material that actively manages thermal energy in response to ambient temperature fluctuations. The material has become a central focus in research on thermal energy storage and temperature sensing in recent years. A key research direction is the incorporation of delignified veneer impregnated with thermochromic phase change material (TPCM) into a multi-layered structure to enhance the thermal energy storage capacity of TWPCM. This study fabricated two thermochromic laminated veneer cellulose-based alizarin/stearic acid/nano‑silicon dioxide/hexagonal boron nitride composites encapsulated with xanthan gum and wood wax oil films, designated as TWPCM1-XW and TWPCM2-XW. Herein, a TPCM with superior latent heat value (215.9 J/g) was fabricated by compositing alizarin and stearic acid. TWPCM1-XW and TWPCM2-XW can obviously change color within a temperature range of 52–74 °C and revert to primary color at temperatures below 45 °C within 60 min, their latent heat values can reach 133.8 J/g and 163.4 J/g. Therefore, the resulting composites exhibit superior temperature-responsive and thermal-storing capabilities. Moreover, the materials demonstrate outstanding long-term applicability and stability in their capabilities. Additionally, the chemical structures of the synthesized materials were elucidated, and their thermochromic and thermal-storing mechanisms were explained for developing the smart material.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Xinjian He,Xinyu Li,Cunmin Wang,Jiaqi Li,Xinyi Song,Guiying Zhu,Xiang Li,Yifan Zhang,Xuanjin Zhu,Jiang Shao,Mingming Zhang,Huan Xu
The development of multifunctional nanofibrous membranes (NFMs) that enable anti-viral protection during air purification and respiratory disease diagnosis for health management is of increasing importance. Herein, we unraveled a heterostructure-enhanced electro-induced stereocomplexation (HEIS) strategy to fabrication of poly(lactic acid) (PLA) NFMs enabling a combination of efficient PM removal, respiratory monitoring and self-sterilization. The strategy involved an electro-induced stereocomplexation (EIS) approach to trigger the generation of hydrogen bonds between enantiomeric poly( L -lactic acid) (PLLA) and poly( D -lactic acid) (PDLA) chains, promoting C O dipole alignment and molecular polarization during electrospinning. This was further enhanced by incorporation of Ag-doped TiO 2 (Ag-TIO) nanodielectrics to promote the electroactivity and surface activity, conferring profound refinement of PLA nanofibers (from 460 nm to an ultralow level of 168 nm) and high porosities of over 91 %. Arising from the sustainable generation of plentiful charges based on triboelectric nanogenerator (TENG) mechanisms, the electroactive PLA NFMs exhibited remarkable triboelectric properties even in high-humidity environments (80 %RH), excellent PM 0.3 filtration efficiency with an ultralow pressure drop (93.1 %, 31.8 Pa, 32 L/min), and 100 % antimicrobial efficiency against both E. coli and S. aureus . Moreover, a deep-learning algorithm based on convolutional neural network (CNN) was proposed to recognize various respiratory patterns. The proposed strategy confers the biodegradable NFMs an unusual combination of ultralow-resistance air purification and machine learning-assisted health management, signifying promising prospects in environmental protection and personal healthcare.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Qiyi Gan,Huakang Yang,Zining Zhang,Jun Liu,Yudong Guo,Dongxiang Luo,Xiao Liu
In lignin valorization systems, CdSe@CdS nanorods exhibit exceptional photocatalytic performance, where precise control over the rates of oxidation and reduction reactions is crucial. This study introduces a ligand modulation strategy that involves the incorporation of mercaptopropionic acid (MPA) and hexafluorophosphate (PF₆⁻) onto the surface of the nanorods to achieve a balanced redox reaction profile. The inorganic PF₆⁻ ligand primarily promotes reduction reactions, whereas MPA enhances hole transfer. By optimizing the distribution ratio of these ligands, the study achieved a significant enhancement in photocatalytic efficiency, resulting in a 94 % conversion rate for 2-phenoxy-1-phenylethanol (PP-ol) and yields of 67 % and 66 % for phenol and acetophenone, respectively. The distinct roles of MPA and PF₆⁻ can be attributed to their respective spatial site resistances, electrostatic interactions, and surface passivation characteristics. MPA, with its larger spatial resistance, stabilizes and extends hole lifetimes, thereby enhancing hole transfer efficiency. In contrast, PF₆⁻ exhibits lower spatial resistance and stronger electrostatic effects, which facilitate accelerated electron transfer. Furthermore, the ligands optimize the transport pathways for both electrons and holes on the nanorod surface through passivation. This ligand design strategy provides valuable insights for the development of efficient nanorod photocatalysts aimed at biomass valorization.
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POLYMER
·
2024
·
IF 4.1
Tianhao Yang,Jinghan Wu,Yihang Yao,Ke Wang,Qin Zhang,Qiang Fu
Polyvinyl alcohol (PVA) films have significant rigidity due to the large number of hydrogen bonds within and between molecular chains . This feature hinders their industrial applications. Small molecule plasticizers can effectively improve the toughness of PVA films. However, this improvement decreases their modulus and strength . In this study, the effect of individual plasticizer, namely, diethanolamine (DEA), glycerol (GLY), and H 2 O, on the mechanical properties was first studied. It was found that adding an individual plasticizer increase the toughness but decrease the modulus for all the three plasticized PVA films, with DEA decreased least. Then, the property changes caused by of H 2 O and plasticizer content in two synergic plasticizing systems of DEA/H 2 O and GLY/H 2 O were systematically investigated and compared to demonstrate further the different effects of DEA and GLY on the toughness and modulus of the PVA film. Results indicated that the modulus and toughness of PVA casted film with a 10% DEA content improved after the addition of 3% H 2 O for the DEA/H 2 O plasticizing system. Despite a large improvement in toughness, the strength was always largely reduced with the increase in H 2 O or GLY content for the GLY/H 2 O system. The infrared spectrum results showed that H 2 O could be physically combined with both PVA and DEA to construct a cross-linked hydrogen bond network, because of the relatively strong electronegativity of the N atom in DEA. However, forming such a cross-linked hydrogen bond network in the GLY/H 2 O system is difficult. Thus, only a plasticizing effect was observed in the PVA/GLY/H 2 O films. Our work provides a better understanding of the effects of plasticizer and H 2 O on the hydrogen bonding and properties of PVA films to achieve toughness-strength balance via synergic plasticization .
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhen Huang,Yitong Xin,Jiulin Shen,Lan Shen,Junfeng Liu,Xiping Zeng,Huan Ling,Guoli Tu,Hui Yang,Daping He,Bin Hu
Optically transparent electromagnetic interference (OTEMI) shielding materials are garnering significant attention due to their dual capabilities of providing electromagnetic interference (EMI) shielding while maintaining optical transparency. Beyond high shielding efficiency, the materials also require lightweight, ultra-thinness, flexibility, and reliability for extreme conditions applications like industrial and aerospace scenarios, which challenges most existing EMI shielding materials. Herein, we utilize the openings in the percolating silver nanowires network to realize the interpenetrating crosslink of polyamide acid, which enables the in-situ, damage-free encapsulation of the vulnerable conductive network and forms a lightweight OTEMI shielding film with exceptional stability. The 8 μm EMI shielding films show 29–46 dB shielding effectiveness in the 12–18 GHz range, with variable visible light transmittance (45 %-86 %@550 nm), while being capable of withstanding a broad temperature variation from 220 °C to − 170 °C. Moreover, the solution-processed film possesses excellent bending stability and chemical corrosion resistance, showing its unique applications in harsh conditions inaccessible to humans.
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JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Yaoyu Liu,Zongshuai Ji,Tianyu Wang,Guanfeng Liu,Shuai Zhang,Xin Ding,Bing Teng,Shaohua Ji
CsMnX 3 (X = Cl, Br, I) metal halide materials are prone to dissociation in the atmosphere due to the hygroscopic nature of cesium halide (CsX) and manganese halide (MnX 2 ). Addressing this challenge, a novel strategy for synthesizing large bulk of CsMnCl 3 ·2H 2 O single crystals (SCs) using an anti-solvent-assisted method was presented. Importantly, the SCs have a sheet shape with dimensions of 22 mm × 9 mm × 2 mm, and demonstrate superior crystallinity and strong red emission at 630 nm. Furthermore, the electron localization function (ELF) diagram demonstrates that the robust electronegativity of O element, enhancing the thermal stability of the octahedral structure. Meanwhile, the crystals retained 85 % of their original value even after 90 days in an atmospheric environment. In addition, red light-emitting devices (LEDs) were fabricated using the CsMnCl 3 ·2H 2 O single crystals , which shows the voltage, and Commission Internationale de lEclairage (CIE) color coordinates remained superior stable when the current changed from 100 to 200 mA. Thus, the excellent stability of CsMnCl 3 ·2H 2 O can promote its practical application in optoelectronics .
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