SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
·
IF 6.3
Xueting Zhang,Jicheng Zhang,Nan Tian,Zhaoxuan Huang,Shiyu Duan,Jilin Wang,Disheng Yao,Guoyuan Zheng,Yanhan Yang,Bing Zhou,Fei Long
Stability of perovskite is the main limitation of the commercialization of perovskite solar cells . Recent studies have shown that FA-Cs perovskites are expected to achieve ideal crystal structures with outstanding stability when FA content is 30 %. And its bandgap can be adjusted to 1.8 eV, making it suitable for a top battery in the tandem cell. However, when the content of Cs ions in the component exceeds 30 %, phase separation occurs. In this study, a Cs-rich Cs 0.7 FA 0.3 PbI 2 Br perovskite film was synthesized by using a 2D to 3D phase transition method. Through the high orientation of the 2D CsPbI 3 -FAI alloy-like phase and the anisotropic volatilization of FA, a well-oriented α-Cs 0.7 FA 0.3 PbI 2 Br perovskite phase is obtained. The α-Cs 0.7 FA 0.3 PbI 2 Br shows excellent thermal and UV stability and improved humidity stability. Meanwhile, the fabricated Cs 0.7 FA 0.3 PbI 2 Br perovskite solar cell achieved a competitive power conversion efficiency of 14.87 % successfully breaking the world record for this perovskite system. This further advances the research progress of Cs-rich perovskites in highly efficient and stable solar cells.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Zhiguo Wu,Dan Liu,Ying Deng,Runyi Pang,Jinjin Wang,Tian Qin,Zongzheng Yang,Rongliang Qiu
In this research, a new material, chitosan/polypyrrole (CS/PPy), was synthesized and linked with the Cr(VI)-reducing bacterial strain YL3 to treat Cr(VI)-polluted soil. The findings demonstrated that the synergistic application of strain YL3 and CS/PPy achieved the greatest reduction (99.6 %). During the remediation process, CS/PPy served as a mass-storage and sustained release agent in the soil, which initially decreased the toxic effects of high concentrations of Cr(VI) on strain YL3, thereby enhancing the Cr(VI) reduction efficiency of strain YL3. These combined effects significantly mitigated Cr(VI) stress in the soil and restored enzyme activities . Furthermore, wheat growth in the treated soil also significantly improved. High-throughput sequencing of the microorganisms in the treated soil revealed that CS/PPy was not only effective at removing Cr(VI) but also at preserving the original microbial diversity of the soil. This suggests that the combined treatment using strain YL3 and CS/PPy could rehabilitate Cr(VI)-contaminated soil, positioning CS/PPy as a promising composite material for future bioremediation efforts in Cr(VI)-contaminated soils.
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LANGMUIR
·
2025
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IF 3.9
Ning Guan,Qin Chen,Xinyue Zhang,Kai Chen,Haiyan Feng,Cunao Feng,Dekun Zhang,Shirong Ge
Polyether ether ketone (PEEK) is widely used in orthopedics due to its good mechanical properties and biocompatibility; however, its bioactivity and osseointegration ability are poor. In this article, PEEK materials were dual-modified by surface sulfonation treatment and the loading of active hydrogels (phosphorylated gelatin/chitosan/hydroxyapatite) to improve their bioactivity and osseointegration. Initially, a microstimulated sulfonation process was employed to construct an optimized porous structure on the PEEK surface, with a porosity of 54.63% and an average pore size of 3.38 μm, which significantly improved hydrophilicity and promoted the adhesion and growth of osteoblasts. Subsequently, utilizing the adhesive properties of polydopamine (PDA), the phosphorylated gelatin/chitosan/hydroxyapatite composite hydrogel (PG/CS/HA hydrogel) was loaded onto the surface of SPEEK, resulting in the construction of a highly active and strongly osteogenic SPEEK-PG/CS/HA material. The results showed that the dual modification of the porous sulfonated structure and bioactive hydrogel significantly enhanced the hydrophilicity, biocompatibility, mineralization ability, and osseointegration of the PEEK. Specifically, the cell proliferation capacity increased by 32% after 7 days of coculture on MC3T3-E1 cells; the alizarin red staining rate after 14 days of coculture reached 72.49%, representing a 111% improvement; and the expression levels of osteogenic genes ALP, OPN, and RUNX2 increased by 132%, 151%, and 131%, respectively, demonstrating excellent in vitro osteogenic induction potential. The SPEEK-PG/CS/HA material effectively solves the problem of bioinertia in the PEEK material, offering a novel modification strategy for orthopedic implants.
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MOLECULES
·
2024
·Vol. 29
·期 5
·1094
·
IF 4.2
Hui Liang,Yongxin Zhao,Tongjin Liu,Ruijuan Li,Rumei Li,Yuxiao Zhu,Feng Fang
Zn-doped MnCO3/carbon sphere (Zn-doped MnCO3/CS) composites were synthesized using a simple hydrothermal procedure. Among various samples (ZM-50, ZM-05, and ZMC-0), the ternary Zn-doped MnCO3/CS (ZMC-2) catalyst demonstrated excellent visible light-induced photocatalytic activity. This improvement comes from the Zn addition and the conductive CS, which facilitate electron movement and charge transport. The catalyst exhibited efficient degradation of methylene blue (MB) over a wide pH range, achieving a removal efficiency of 99.6% under visible light. Radical trapping experiments suggested that •OH and •O2−played essential roles in the mechanism of organic pollutant degradation. Moreover, the catalyst maintained good degradation performance after five cycles. This study offers valuable perspectives into the fabrication of carbon-based composites with promising photocatalytic activity.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Yuanli Li,Chunqiang Zhuang,Shi Qiu,Junfeng Gao,Quan Zhou,Zaicheng Sun,Zhenhui Kang,Xiaodong Han
Metal halide perovskites with broad optical absorption and long carrier lifetime are considered as ideal photocatalysts. However, their poor stability in water greatly impedes their application in photocatalytic H 2 evolution because they lose their crystalline structure in water. Herein, we proclaim a new class of photocatalysts: all-inorganic Cs-Cu-Cl perovskite quantum dots (QDs). It exhibits a high photocatalytic hydrogen production rate of ∼ 3.1 mmol/g/h without any cocatalyst under AM 1.5-G solar irradiation (100 mW/cm 2 ). Especially, it remains the high activity for up to 330 h without apparent deterioration of the hydrogen production rate. Density functional theory (DFT) calculations reveal that the Cu site works as the electron and proton absorption sites as the H 2 production active center. To our best knowledge, there is no report of metal halide perovskites as water-stable photocatalysts. This work opens an innovative way for guiding the exploration of metal halide perovskites photocatalysts for stable photocatalytic H 2 evolution.
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Frontiers in Bioengineering and Biotechnology
·
2025
·
IF 4.8
Jinlong Wang,Guoxing Huang,Quan Qin,Nianhua Dan,Xinlou Li,Kai Sun,Yuan Yang,Meng Wang
Introduction The high incidence of skin injuries and the limitations of conventional dressings highlight the need for advanced wound care materials. Electrospun nanofibrous scaffolds, with their extracellular matrix-like architecture, offer potential to enhance healing. Methods A bilayer nanofibrous scaffold of thermoplastic polyurethane (TPU) and chitosan loaded with zinc oxide nanoparticles (ZnO) (TPU/CS@ZnO) was fabricated via electrospinning. The scaffold consisted of a hydrophobic TPU outer layer for waterproof protection and a hydrophilic TPU/CS@ZnO inner layer for bioactivity. Physicochemical properties were characterized by morphology, mechanical strength, and wettability. Cytocompatibility was evaluated in vitro, and wound healing efficacy was tested in vivo using a full-thickness skin defect model. Results The scaffold displayed uniform fibres with a base-layer diameter of 231.81 ± 44.85 nm, tensile strength of 8.42 ± 0.58 MPa, and Young’s modulus of 17.96 ± 0.78 MPa. Water contact angles confirmed hydrophilic and hydrophobic layer characteristics (52.68° ± 4.46° vs. 113.60° ± 2.85°). In vitro studies showed enhanced cell proliferation and adhesion, while in vivo experiments demonstrated over 90% wound closure at day 14, significantly faster than untreated groups. Histological analysis indicated contributions from cellular adhesion, angiogenesis, and immunomodulation. Discussion The bilayer TPU/CS@ZnO scaffold integrates structural protection with biological activity, accelerating wound repair through multiple mechanisms. These findings support its potential as a multifunctional wound dressing, while further studies are needed to clarify molecular pathways and advance clinical application.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Jiarong Lv,Yanyan Qian,Yuetong Zhu,Qun Jing,Xinmei Wang,Zhaohui Chen
Two deep-ultraviolet (DUV) transparent nonlinear optical (NLO) materials, AAl 3 P 6 O 20 (A = Rb, Cs) ( I, II ), have been elaborately designed from Ba 5 P 6 O 20 by aliovalent substitution strategy. Both of compounds crystallize in noncentrosymmetric (NCS) C222 1 (No. 20) space group with three-dimensional (3D) ∞ 3 Al 3 P 6 O 20 skeleton. The cutoff edges of I and II are lower than 190 nm, which are the shortest ones among the reported Al-based phosphates. In addition, their syntheses, thermal properties, NLO performances are discussed and the first-principles calculation elucidates the origin of the optical properties . This study shows that aliovalent substitution is an effective synthetic route for designing DUV transparent Al-based phosphates NLO materials.
研究领域:
材料科学
·
光学
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xiaoyu Jia,Chenxu Zhang,Yongcai Zhang,Enren Zhang
In this study, Fe/N/Cs oxygen reduction reaction (ORR) catalysts with high specific surface area, catalytic activity were synthesized using legume biomass with different protein content. The catalytic activity of the Fe/N/C catalysts was confirmed to be related to the protein content of the biomass precursor by characterization and electrochemical tests. The catalysts (named as Fe/N/C-T) from lactone tofu have the highest N/C ratio related to ORR, and the air-cathode loaded with Fe/N/C-T catalysts exhibited the best ORR performance in linear sweep voltammetry (LSV) tests, which was comparable to that of commercial Pt/C catalysts. MFCs with AC(Fe/N/C-T) air-cathode produced a maximum power density of 0.486 mW cm −2 , higher than Pt/C (0.437 mW cm −2 ) with the same loading. In addition, the Fe/N/C-T catalyst demonstrated high stability and resistance to toxicity in long-term operation, which can be an alternative to commercial Pt/C.
研究领域:
环境科学
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材料科学
·
生物工程
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MINERALS ENGINEERING
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2026
·
IF 6
Kun Xu,Mingming Yu,Heyue Niu,Yusufujiang Mubula,Zhehan Zhu,Di Han,Jingzhong Kuang,Lingguo Meng,Guichun He
Lepidolite, a critical mineral resource, contains lithium (Li), rubidium (Rb), and cesium (Cs) — indispensable core elements for modern industrial development. This study proposes a novel “calcining-electric field enhanced alkaline leaching” process for the simultaneous extraction of Li, Rb, and Cs from lepidolite. Under the calcination conditions (850 °C, 120 min) and optimal alkaline leaching parameters (70 wt% NaOH initial concentration, 4:1 liquid–solid ratio, 180 °C, 6 h, 100 r/min stirring speed, and 1.1 A/cm 2 current density), the leaching efficiencies of Li, Rb, and Cs reach 94.3%, 95.2%, and 92.6%, respectively. Compared with the traditional alkaline leaching without an electric field, the proposed method improves the leaching rates of Li, Rb, and Cs by 5.2%, 1.0%, and 11.3%, respectively, under the combined effects of external electric field and alkaline medium. Combined with phase analysis, micro-morphology characterization, surface element content determination, and reactive oxygen species (ROS) quantitative analysis via XRD, SEM, EDS, and UV–Vis characterizations, the core mechanism is revealed: the external electric field induces in-situ formation of stable ROS in the alkaline medium, which effectively destroys the surface and layered structure of calcined lepidolite concentrate, accelerates the oxidative decomposition of ionic bonds in polymetallic silicates and uniform substitution on the mineral surface, exacerbates lattice distortion and internal structure damage, promotes phase transformation of polymetallic silicates, and enhances the conversion of Li, Rb, and Cs to soluble hydroxides, ultimately realizing the directional phase reconstruction of lepidolite concentrate from primary aluminosilicate to soluble hydroxide phases.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Zhen Zeng,Fengfeng Gao,Yu Zhao,Xiaohan Xing,Can Wang,Xiao Du,Xiaogang Hao,Xiumin Li
A novel 4-tert-butyl-2-(α-methylbenzyl) phenol/bis(2-ethylhexyl) phosphate/ Multi-Walled Carbon Nanotubes (t-BAMBP/P204/MWCNTs) supported liquid membrane (SLM) was prepared via an in-situ impregnation method. The MWCNTs network effectively anchored the t-BAMBP/P204 synergistic extractants, enhancing membrane stability. Through proton exchange and coordination interactions, this membrane efficiently extracts Cs + in weakly alkaline environments. A systematic investigation was conducted into the effects of MWCNTs, t-BAMBP and P204 ratios, diluent ratio (kerosene: cyclohexane), pH value, and temperature on Cs + extraction performance. In this system, at equal concentrations (C Cs+, Rb+ = 200 ppm), the Cs + permeation flux reached 25.2 mmol/m 2 /h, and the Cs + /Rb + separation coefficient was 8.90. In selective permeation experiments conducted in a mixed solution containing equal concentrations of Cs + , Rb + , K + , Na + , and Li + , the separation factors for Cs + /Li + , Cs + /Na + , Cs + /K + , and Cs + /Rb + were 144.6, 45.75, 18.09, and 8.93, respectively. Furthermore, the t-BAMBP/P204/MWCNs SLM was applied to the extraction and separation of cesium from simulated lithium mica lithium-extraction tail liquor, and the system demonstrated excellent selectivity. The separation factors for Cs + /Li + , Cs + /Na + , Cs + /K + , Cs + /Rb + , Cs + /Mg 2+ , and Cs + /Ca 2+ reached 380.67, 571, 76.13, 16.79, 17.57, and 3.525, respectively. Following ten permeation experiments, both the Cs + permeation flux and the separation factors of Cs + /Rb + maintained high cycle stability. Through slope analysis and electrospray ionization mass spectrometry, it was confirmed that Cs + coordinates with t-BAMBP and P204 to form compounds with the chemical formulae [(ROCs)·(ROH)], [(ACs)·(HA)], and [CsOR·ROH(HA)]. Additionally, Cs + was found to form complexes with the two extractants individually. DFT calculations indicated that the reaction process was predominantly governed by the formation of complexes between t-BAMBP dimers and Cs + . This study presents a promising new method for Cs + recovery based on membrane separation processes.
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Nanoscale
·
2026
·
IF 5.2
Mengrou Wang,Lei Mao,Wenbo Jia,Xinbo Fu,Xin Wang,Jing Chen,Zhuoya Zhu,Zhiwei Zhao,Jun Wu,Damian Onwudiwe,Byung Seong Bae,Mehmet ERTUĞRUL,Muhammad Zaman Ashraf,Jianming Zhou,Qing Li,Wei Lei
Carbon dioxide (CO2 ) emissions have become a key environmental issue of widespread concern at present. Currently, the use of metal oxide based chem-resistive gas sensors are restricted due to their high operating temperature and short lifetime. Therefore, the development of efficient and rapid gas sensors are of great significance in modern research. Lead free double perovskite, Cs2AgBiBr6 (CABB), could be activated by ultraviolet light and generate a large number of free carriers, which have the potential to increase charge density and enhance the gas sensitivity. Photoinduced carriers provide sufficient reactants, which contributes to the activation between target gases and sensitive semiconductors. Heterojunction of ZIF-67/CABB combines gas adsorption by ZIF-67 and photo-activated gas sensitive response by CABB in one device, which response could reach up to -95.55% when illuminated with the light of 365 nm wavelength and 17.34 mW cm -2 incident power density. Average response/recovery time of ZIF-67/CABB heterojunction could reach to 39.07s and 5.04s under UV illumination. The adequate response/recovery time of this fabricated device is 38.89s and 3.17s, with maximum response when at the voltage bias of 5V, which attains the advanced level comparable with commercially available CO2 detectors. The heterojunction system decreases the dark current density from 3.89 A m -2 to 0.78 A m -2 , and also decrease the light current density from 18.48 A m -2 to 5.33 A m -2 compared with pristine CABB at 5 V bias through current-voltage characteristic curves, which promotes the response and stability of the device. The linear dynamic range of the heterojunction gas sensor is 1700ppm-14000ppm, with sensitivity of 0.0013%/ppm. After more than 35 mins continuous stably work, the current density still remains consistent. This efficient, wide working voltage range and stable device presents the future of high-performance photo induced gas detector applications.
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Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Hussin Elkik,Muhammad Mujahid Iqbal,Aqsa Munawar,Zhihua Yang,Fangfang Zhang,Shilie Pan
The progress of all-inorganic Ruddlesden–Popper (RP) perovskites broadens the selection of materials suitable for optoelectronic applications, especially in improving stability and performance. Two new alkali metal calcium halide nitrate-based layered RP perovskite variants, Rb2Ca(NO3)2Cl2 and Cs2Ca(NO3)2Cl2, have been synthesized through a facile solution evaporation method. Remarkably, the title compounds exhibit a unique RP perovskite-like nitrate layered structure with significant birefringence (0.099–0.104@546 nm) and short ultraviolet (UV) absorption wavelengths (220–225 nm). In-depth structural investigation and theoretical analyses indicate that the birefringence substantially arises from the planar triangular [NO3] groups. This study not only enhances the structural diversity of layered perovskites but also provides an effective strategy for the continued investigation of all-inorganic birefringent optical materials in the UV region.
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