Science Advances
·
2021
·Vol. 7
·期 7
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IF 14.143
Yucheng Liu,Yunxia Zhang,Xuejie Zhu,Zhou Yang,Weijun Ke,Jiangshan Feng,Xiaodong Ren,Kui Zhao,Ming Liu,Mercouri G. Kanatzidis,Shengzhong (Frank) Liu
The triple-cation mixed-halide perovskite (FA x MA y Cs 1- x - y )Pb(I z Br 1- z ) 3 (FAMACs) is the best composition for thin-film solar cells. Unfortunately, there is no effective method to prepare large single crystals (SCs) for more advanced applications. Here, we report an effective additive strategy to grow 2-inch-sized high-quality FAMACs SCs. It is found that the judiciously selected reductant [formic acid (FAH)] effectively minimizes iodide oxidation and cation deprotonation responsible for phase segregation. Consequently, the FAMACs SC shows more than fivefold enhancement in carrier lifetimes, high charge mobility, long carrier diffusion distance, as well as superior uniformity and long-term stability, making it possible for us to design high-performance self-powered integrated circuit photodetector. The device exhibits large responsivity, high photoconductive gain, excellent detectivity, and fast response speed; all values are among the highest reported to date for planar-type single-crystalline perovskite photodetectors. Furthermore, an integrated imaging system is fabricated on the basis of 12 × 12 pixelated matrixes of the single-crystal photodetectors.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2024
·Vol. 31
·期 11
·16795-16804
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IF 0
Li Haiyu,Xu Mingze,Zhang Tingsong
The issue of water pollution has emerged as a formidable challenge, prompting a pressing need for solutions. The utilization of metal nanoparticles with surface plasmon resonance and semiconductor composite photocatalysts is regarded as a highly effective approach to solve this problem. g-C 3 N 4 is an effective catalyst for the degradation of organic pollutants. Its photocatalytic performance is usually enhanced by the use of the noble metal Au Ag. However, the high cost of these materials limits their application. In this study, we present the synthesis of Al NPs/g-C 3 N 4 nanocomposites using the bridging effect of ligands. The characterized of transmission electron microscopy (TEM), X-ray diffractometer (XRD) and ultraviolet-visible spectroscopy (UV-Vis) proved that Al NPs/g-C 3 N 4 with a wider light absorption range were successfully synthesized. The effects of ligands, (glutathione (GSH), glutamic acid (GAG), and cysteine (CYS)), Al diameter (40 to 200 nm) and the ratio of Al to g-C 3 N 4 (1:1 to 5:1) on the photocatalytic degradation of methylene blue (MB) by Al NPs/g-C 3 N 4 were also evaluated. The results showed that the optimum degradation efficiency of Al NPs/g-C 3 N 4 for MB at 5 mg/L reached 100% within 60 min, which was 11 times higher than that of pure g-C 3 N 4 . The principal analysis of Al enhancing the photocatalytic performance of g-C 3 N 4 was studied through transient photocurrent spectroscopy (TPC), electrochemical impedance spectroscopy (EIS), and steady-state transient fluorescence spectroscopy (PL). The results confirmed that hot carriers generated by localized surface plasmon resonance (LSPR) of Al nanoparticles increase the carrier concentration. In addition, the Schottky barrier generated by Al and g-C 3 N 4 could also improve the carrier separation rate and increase the carrier lifetime. This work is expected to solve the problem of organic wastewater treatment and lay the foundation for subsequent research on photocatalysis. Graphical abstract
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
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IF 8.328
Junlong Zhang,Yan Lu,Lei Ge,Changcun Han,Yujing Li,Yangqin Gao,Songsong Li,Hao Xu
Novel AuPd bimetallic alloy nanoparticles (NPs) decorated two-dimensional (2D) BiVO 4 nanosheet photocatalysts were successfully synthesized via mild wet-chemical process and facile deposition procedure. The composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electronic microscope (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflection spectroscopy (DRS), electron spin resonance (ESR) and surface photovoltage spectroscopy (SPV). The 1.0 wt% AuPd/BiVO 4 nanosheets showed highest photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light (300 W Xe lamp coupled with a UV-cutoff filter (λ ≥ 400 nm)), and the photocatalytic efficiency was improved for about 21.9 and 6.1 times as compared to that of pure BiVO 4 and 1.0 wt% Au/BiVO 4 , respectively. The novel AuPd/BiVO 4 composites may make a way to synthesize 2D semiconductor composites with potential applications for solar energy conversion and environmental purifications.
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JOURNAL OF HAZARDOUS MATERIALS
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2018
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IF 6.434
Lei He,Yanan Dong,Yane Zheng,Qingming Jia,Shaoyun Shan,Yaqin Zhang
A novel magnetic MIL-101(Fe)/TiO 2 composite was synthesized for photo degradation of tetracycline (TC) under solar light. The composite was characterized by XRD, TGA, SEM, TEM, EDS, BET, FTIR, XPS, VSM, ESR, and PL. The resultant composite was environment friendly material, which exhibited high TC degradation efficiency and excellent reusability. In the meantime, it could be separated easily from TC solution by using magnet, which would save significant time and cost of preparation and degradation, having broad prospect in application. Using 1 g L −1 magnetic MIL-101(Fe)/TiO 2 at pH = 7, 92.76% degradation efficiency was achieved under solar light irradiation in 10 min for 20 mg L −1 TC. Further experiments indicated that TiO 2 introduced in the composite played an important role in the degradation process, which could be activated by the UV light in solar light to generate large amount of O 2 − and OH radicals. The degradation efficiency of TC in this paper was significantly higher than other research papers reported in last three years. This study put forward new magnetic Fe-based metal-organic frameworks (MOFs)/TiO 2 composite for degrading pharmaceutical wastewater.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-8
·
IF 15.7
Li Yajing,Meng Na,Xu Yutian,Yu Bufan,Liu Junhao,Cui Yuanhao,Wang Ziqiang,Ke Xinwu,Pan Tengfei,Min Xue,Chen Jiangshan,Ma Dongge,Chao Lingfeng,Hu Zhelu,Xia Yingdong,Guo Qingxun,Chen Yonghua,Huang Wei
Thermal-evaporated perovskite light-emitting diodes are highly promising for future display and lighting. However, multi-source co-evaporation faces challenges such as difficulty in regulating crystallinity, especially for red perovskite light-emitting diodes, whose external quantum efficiencies are still less than 2%. Here, we demonstrate a facile layer-by-layer thermal-evaporation strategy to fabricate high-quality perovskite-emitting films with tunable emission wavelengths. 5-Aminovaleric acid is introduced to regulate interfacial reactions during deposition, slow down crystallization during post-annealing, and passivate defects through coordination interactions. This approach yields perovskite emitting layers with high uniformity and luminance efficiency. As a result, red (670 nm) and deep-red (730 nm) perovskite light-emitting diodes achieve maximum external quantum efficiencies of 9% and 7.27%, and luminance of over 1500 cd m -2 and 200 W s -1 m -2 , respectively. Furthermore, large-area (2500 mm²) and patterned perovskite thin films and light-emitting diodes with outstanding uniformity are successfully demonstrated.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Peng Lin,Weiming Yi,Deli Zhang,Fang Wang,Peng Fu,Xiaoning Duan,Yuwan Sheng
The complex composition of bio-oil hinders its efficient conversion to hydrogen. This study investigates the effects of three separation methods (fractional condensation, water extraction, and molecular distillation) on bio-oil composition and subsequent reforming performance. These methods not only achieve separation but also upgrade bio-oil by enriching active components (such as acids, ketones) and removing coke precursors (such as sugars). Molecular distillation yielded light bio-oil with the highest ketone content (28.80 %) and no sugars, exhibiting optimal reforming performance: 93.42 % hydrogen yield and 94.86 % carbon conversion at 700 °C, with a catalyst lifespan of 600 min. The results demonstrate that suitable separation can enhance hydrogen production by optimizing composition and mitigating deactivation. This study proposes a new approach to promoting the efficient utilization of biomass and the production of green hydrogen from renewable resources.
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JOURNAL OF ORGANIC CHEMISTRY
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2025
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IF 3.6
Qiujie Shan,Lu-Lu Chai,David James Young,Zhi-Gang Ren,Hong-Xi Li
The light-promoted, nickel-catalyzed hydrogen-evolution C(sp3)–H acylation of simple alkanes with aromatic aldehydes has been achieved without the need for additional photosensitizers or oxidants. This reliable and atom-economical reaction afforded a broad range of aryl alkyl ketones in good yields, with H2 as the sole byproduct. It was successfully demonstrated on a gram scale as well as for the postfunctionalization of drug molecules. Aromatic aldehydes play multiple roles, including a photosensitizer, a coupling partner, and a hydrogen atom transfer agent.
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Advanced Optical Materials
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2025
·
IF 7.2
Wei Wang,Shizheng Zhang,Sitao Huo,Fan Cao,Sheng Wang,Qianqian Wu,Rui Li,Xuyong Yang
Indium phosphide (InP) quantum dots (QDs) have emerged as eco-friendly substitutes for cadmium (Cd)-based QDs. However, their electroluminescence (EL) performance, especially for blue ones, lags significantly behind that of the state-of-the-art Cd-based counterparts. This disparity can be attributed to the abundant defect states arising from their high surface area/volume ratio and irregular size distribution caused by high-reactivity phosphorus (P) precursor. Herein, trimethylgermanium chloride is developed into the P precursor, effectively modulating the nucleation reaction rate and drastically reducing phosphorus oxide defects. Furthermore, the epitaxial growth of the ZnS layer is successfully achieved employing zinc diethyldithiocarbamate as the precursors. This approach not only facilitates superior crystallinity in QDs at lower temperatures but also effectively suppresses electron diffusion to the shell, thereby alleviating the persistent redshift and ensuring the peak position remains within the blue emissive range. Consequently, the synthesized blue InP/ZnS QDs demonstrate a PLQY of 73% at 474 nm, empowering them to exhibit exceptional EL performance with a peak external quantum efficiency of 2.38% and a record luminance of 2693 cd cm −2 .
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Small
·
2025
·
IF 12.1
Chen Yang,Zhiguang Guo
Superhydrophobic surfaces are susceptible to structural deformation and damage during use, which significantly impacts their long-term stability and performance in anti-/de-icing applications. To address this challenge, a biomimetic superhydrophobic polyurethane film inspired by Xanthium strumarium (PBXS) is proposed. This film not only delivers efficient anti-/de-icing performance but also demonstrates exceptional long-term durability. Even when the surface structure undergoes deformation or complete fracture, it can quickly self-heal under near-infrared light, restoring its original properties. The results show that, due to the superhydrophobic micron spine array and photothermal effect, PBXS can delay droplet freezing at low temperatures (−10 °C, 2052 s) and enable rapid de-icing (1 sun, 187 s). Moreover, by incorporating the shape-memory properties of thermoplastic polyurethane and self-healing capability, PBXS effectively addresses issues related to surface deformation (after ten deformation-healing cycles, PBXS maintains a water contact angle of 157 ± 1° and a rolling angle of 15.4 ± 1°) and material rupture (after ten fracture-healing cycles, PBXS retains a water contact angle of 152 ± 1° and a rolling angle of 16.1 ± 1°). This innovative approach enhances the long-term performance of anti-/de-icing films and shows significant potential for applications in road transportation, power transmission lines, and other anti-/de-icing fields.
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FOOD CHEMISTRY
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2025
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IF 9.8
Zheng Zhou,Bo Wang,Liang Wang,Meng Dong,Dayong Zhou,Xuhui Huang,Ian Fisk,Lei Qin
Light wavelengths can lead to differences in flavor and components of food by lipid photooxidation. However, the relevant molecular mechanisms are still unclear. This study explored the effects of light wavelengths (365 and 405 nm) on volatile and nonvolatile compound structures in salmon oil, along with the underlying mechanisms, via lipidomics and oxlipidomics approaches. The shorter light wavelength more effectively catalyzed lipid oxidation, leading to greater diversity and higher content of volatiles. It more readily catalyzed the formation of carbonyl-containing compounds, such as aldehydes and enones, contributing to hot oil and fried fish flavors. The wavelength of 405 nm favored the formation of hydroxyl-containing compounds (enols and alcohols), leading to stronger seaweed and grass aromas. During photooxidation, 1 O 2 activated by light radiation preferentially reacted with double bonds at the ends of fatty acid chains with low steric hindrance, yielding more lipids with 16-20C fatty acids and small molecule volatiles (4C 6C).
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Laser & Photonics Reviews
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2025
·
IF 10
Jie Wang,Dongyuan Han,Bin Zhao,Ziang Zang,Huiyu Ji,Lang Liu,Ning Wang
Tin (Sn) perovskites have emerged as viable candidates for high-performance, lead-free perovskite light-emitting diodes (PeLEDs). However, the limited availability of efficient and stable Sn perovskites, and the development of large-area Sn PeLEDs encourage further research. Here, FPEA 2 SnI 4 (FPEAI, 4-fluoro-phenethylammonium iodide) perovskite is reported as a potential emitter for PeLEDs. To overcome the anisotropic carrier transport in layered FPEA 2 SnI 4 perovskites, an electronic push-pull effect strategy is introduced by incorporating 6-amino-4-hydroxy-2-naphthalenesulfonic acid (γ acid) molecule in FPEA 2 SnI 4 perovskites. The unique electronically push-pull configuration of γ acid establishes a cross-layer electron transfer channel, which mitigates electron aggregation within the organic layers, enhances electron injection and directional transfer, and effectively promotes radiative recombination. Furthermore, multifunctional γ acid provides multiple interaction sites for Sn perovskites, reducing defect state density and stabilizing FPEA 2 SnI 4 perovskites. Leveraging the enhanced robustness of FPEA 2 SnI 4 films with γ acid, a large-area Sn PeLED with an active area of 2.25 cm 2 , achieves a maximum luminance ( L max ) of 371 cd m −2 , a peak external quantum efficiency (EQE) of 15.49%, and an operational half-lifetime of 71.6 h at 100 cd m −2 . These findings underscore the application potential of Sn PeLEDs in the realms of solid-state lighting and planar display.
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Materials Today Communications
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2025
·
IF 4.5
Haiman Xu,Rongzhen Liu,Chonggao Bao,Na Huang,Pan Li,Hao Li
Aluminum nitride (AlN) ceramics are widely utilized in various applications due to their exceptional properties. However, fabricating complex AlN components using conventional machining techniques remains challenging. To address this issue, Digital Light Processing (DLP) is proposed as a viable technique for manufacturing intricate AlN ceramics. A key challenge in this process is the moisture absorption and hydrolysis of AlN powders, which significantly increase slurry viscosity and affect the layer-by-layer accumulation of AlN slurry. This study systematically investigated the particle size distribution, rheological behavior, and curing kinetics of AlN slurry processed with different ball-milling times. At a ball-milling time of 8 h, the slurry with a 54 vol% solid loading exhibited a viscosity of 21.1 Pa.s at a shear rate of 27 s −1 and a curing depth of 83 μm at an energy dose of 74.4 mJ/cm². Following debinding and sintering, the sintered AlN ceramics achieved a flexural strength of 98.7 MPa, a bulk density of 2.74 g/cm³ , and an open porosity of 12.82 %. These findings provide critical insights into optimizing slurry preparation and processing parameters for the DLP-based fabrication of AlN ceramics.
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