Science Advances
·
2021
·Vol. 7
·期 34
·
IF 14.143
Jun-Hua Wei,Jin-Feng Liao,Lei Zhou,Jian-Bin Luo,Xu-Dong Wang,Dai-Bin Kuang
Although single-source white emissive perovskite has emerged as a class of encouraging light-emitting material, the synthesis of lead-free halide perovskite materials with high luminous efficiency is still challenging. Here, we report a series of zero-dimensional indium-antimony (In/Sb) alloyed halide single crystals, BAPPIn 2–2 x Sb 2 x Cl 10 (BAPP = C 10 H 28 N 4 , x = 0 to 1), with tunable emission. In BAPPIn 1.996 Sb 0.004 Cl 10 , bright yellow emission with near 100% photoluminescence quantum yield (PLQY) is yielded when it was excited at 320 nm, which turns into bright white-light emission with a PLQY of 44.0% when excited at 365 nm. Combined spectroscopy and theoretical studies reveal that the BAPP 4+ -associated blue emission and inorganic polyhedron–afforded orange emission function as a perfect pair of complementary colors affording white light in BAPPIn 1.996 Sb 0.004 Cl 10 . Moreover, the interesting afterglow behavior, together with excitation-dependent emission property, makes BAPPIn 2–2 x Sb 2 x Cl 10 as high-performance anti-counterfeiting/information storage materials.
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Desalination and Water Treatment
·
2024
·
IF 1
Mengyao Luo,Xue Sun,Tingting Jiao,Q. Guangzhou
A simple hydrothermal method was employed to synthesize BiVO 4 supported on reduced graphene oxide (BiVO 4 /RGO) composite photocatalyst to enhance photocatalytic activity of BiVO 4 for degradation of dye wastewater under visible light. The prepared photocatalysts were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, UV-Vis DRS and photocurrent measurements. The photocatalytic performances of the BiVO 4 /RGO composite were evaluated by degradation of Orange II (AO7) under visible light irradiation (λ > 420 nm). A series of experiments were carried out to evaluate the effects of various factors on removal efficiency of AO7. The results show that the BiVO 4 /RGO composite exhibited much higher photocatalytic activity than pure BiVO 4 . The highest removal efficiency of AO7 was obtained, and reach 100% after 150 min when the doping content, pH value, catalyst dosage was GB30 (30 mg of GO corresponds to 1 mmol of BiVO 4 ), pH = 9 and 200 mg, respectively. The free radical trapping experiments show that • O 2 - played the most important role in the degradation of AO7. The enhanced catalytic activity of the BiVO 4 /RGO composite can be attributed to the RGO. As an electron acceptor and transporter, RGO can effectively promote charge transfer in composite and inhibit the recombination of photo-induced electron-hole pairs.
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 6
·2137-2143
·
IF 6.4
Jingshan Hou,Jianghua Wu,Zhiyu Qin,Yongzheng Fang,Leijun Shen,Xin Qiao,Langping Dong,Ganghua Zhang,Yufeng Liu,Guoying Zhao,Haijie Chen
Low-dimensional metal halides have attracted extensive attention because of their superior optoelectronic properties, high stability and structural diversity. In this work, we report a two-dimensional (2D) lead-free halide Cs2MnCl4:Cu+ as a new phosphor for white light-emitting diodes (LEDs). By doping copper(I) into manganese(II) sites, a strong green emission with a photoluminescence quantum yield (PLQY) of 70% was observed. The luminescence center was located at 530 nm and the optimal excitation wavelength was determined to be 310 nm, which suggests a large Stokes shift of 220 nm. Steady-state and transient fluorescence spectra show a decay time of 114.19 μs, indicating a self-trapped exciton (STE) emission mechanism which was further confirmed by temperature-dependent steady-state photoluminescence spectroscopy. This work suggests that manganese halides could be considered as a new family with high luminescence efficiency for optoelectronic applications.
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 13
·3751-3755
·
IF 6.641
Jiao Ma,Hao Wu,Jianbei Qiu,Jing Wang,Qi Wang,Yong Yang,Dacheng Zhou,Jin Han
All-inorganic CsPbX3 (X = Cl, Br, and I) perovskite quantum dots have great potential in the field of white light emission owing to their excellent optical properties. However, to date the research on white light based on perovskite quantum dots has focused on downconversion luminescence, while the up-conversion luminescence properties of quantum dots have received less attention due to lacking the anti-Stokes luminescence properties of the material itself, resulting in limitations in upconversion white light emission to some extent. In this paper, upconversion lanthanide ion-doped fluoride nanoparticles and perovskite quantum dots are combined; the luminescence of the quantum dots is excited successfully by the upconversion luminescence of the nanoparticles and then composite samples with white emission are obtained with regulators of concentration.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yongqiang Zhang,Junhao Xiao,Peng Zhuo,Hao Yin,Yi Fan,Xingyuan Liu,Zhenqiang Chen
Carbon dots (CDs) that exhibit emission over the whole visible spectrum are desired for use in light-emitting diodes (LEDs). Here, CDs displaying tunable fluorescence over the whole visible region are synthesized. Different concentrations of CDs are uniformly dispersed in epoxy resin and coated on 405 nm LED chips to obtain monochrome blue, cyan, green, yellow, red, and deep red LEDs that yield a color gamut covering 99.4% of the National Television Standards Committee (NTSC) standard. These monochrome LEDs display similar high stability. Furthermore, warm and neutral white LEDs are produced by coating cyan- and red-emitting CD layers on 405 nm LED chips, achieving color-rendering indexes (CRIs) of 96.4 and 96.6, respectively. Two fluorescent conversion layers derived from one material at different concentrations simplify the preparation of high-CRI white LEDs. The uniform weak changes of the cyan and red photoluminescence peaks during operation ensure the high stability of these CD-based white LEDs. This research provides a new avenue to develop low-cost, easy-to-prepare CDs with tunable emission colors as alternative phosphors for LED-based high-performance displays and lighting.
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INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Zhaohui Li,Zhenzhen Jiang,Wenda Zhou,Mingyue Chen,Meixia Su,Xingfang Luo,Ting Yu,Cailei Yuan
The high recombination rate of photoinduced electron–hole pairs limits the hydrogen production efficiency of the MoS2 catalyst in photoelectrochemical (PEC) water splitting. The strategy of prolonging the lifetime of photoinduced carriers is of great significance to the promotion of photoelectrocatalytic hydrogen production. An ideal approach is to utilize edge defects, which can capture photoinduced electrons and thus slow down the recombination rate. However, for two-dimensional MoS2, most of the surface areas are inert basal planes. Here, a simple method for preparing one-dimensional MoS2 nanoribbons with abundant inherent edges is proposed. The MoS2 nanoribbon-based device has a good spectral response in the range of 400–500 nm and has a longer lifetime of photoinduced carriers than other MoS2 nanostructure-based photodetectors. An improved PEC catalytic performance of these MoS2 nanoribbons is also experimentally verified under the illumination of 405 nm by using the electrochemical microcell technique. This work provides a new strategy to prolong the lifetime of photoinduced carriers for further improvement of PEC activity, and the evaluation of photoelectric performance provides a feasible way for transition-metal dichalcogenides to be widely used in the energy field.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 6
·4669-4675
·
IF 1.798
Zhang Xiufang,Mei Jie,Wang Song,Zheng Yingying,Cui Can,Pan Jiaqi,Li Chaorong
The cotton cellulose nanofibers(CCNFs)/ZnO/CuS nanocomposites have been successfully fabricated by the electrospun-hydrothermal method and successive ionic layer adsorption. The results of XRD, SEM and TEM indicate that the CuS are successfully combined with the ZnO. The photocatalytic activity of the CCNFs/ZnO/CuS nanocomposites is investigated by the degradation of methylene blue under visible light irradiation, and it is demonstrated to be significantly enhanced after the CuS is introduced. Furthermore, the direct interfacial charge transfer of the ZnO/CuS is considered as the main reason for the enhancement.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2018
·
IF 2.891
Shujing Li,Deepak Prakash Shelar,Chun-Chao Hou,Qian-Qian Chen,Pan Deng,Yong Chen
Three tungsten oxides (WO 3 -W1 to WO 3 -W3) with different morphologies were prepared and characterized by XRD, SEM, TEM and HR-TEM measurements. The as-synthesized tungsten oxides were screened as photocatalysts for visible-light-driven cross dehydrogenative coupling (CDC) reactions along with commercially available WO 3 -W4. Preliminary studies showed that WO 3 -W1 with hollow sphere morphology efficiently photocatalyzed oxidative C H functionalization as compared to other tested samples, by using molecular oxygen as a benign oxidant. The superior photocatalytic performance of WO 3 -W1 can be attributed to its larger surface area and pore structure which was supported by nitrogen adsorption-desorption measurements. Further, this protocol was used to synthesize α-functionalized tertiary amines in good to excellent yields by irradiating a mixture of WO 3 -W1, tertiary amine, and nucleophiles (nitromethane or ketones) to visible light under aerobic conditions. Moreover, WO 3 -W1 can be recycled and reused with no obvious change in catalytic activity, indicating that this is an environmentally friendly and economical protocol and also underlines the robustness of the catalysts in light mediated cross dehydrogenative coupling reactions. It is hoped that our results could offer useful information for designing of new heterogeneous semiconductors for photoredox catalytic organic reactions.
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Coatings
·
2025
·Vol. 15
·期 10
·1229
·
IF 2.8
Mihaela Liu,Zhigao Wang,Anca Maria Varodi,Xinyou Liu
Chinese lacquer (urushi), a traditional East Asian coating material, has been used for more than 7000 years due to its durability, gloss, and cultural significance. However, its long-term stability under natural light remains insufficiently studied, especially regarding the role of mineral pigments in modulating photoaging behavior. In this study, three traditional lacquer coatings pigmented with cinnabar (HgS), orpiment (As2S3), and lapis lazuli were subjected to natural light aging for nine weeks. Colorimetric analysis revealed rapid chromatic changes during the initial stage of exposure, followed by slower transformations, with cinnabar-based red lacquer showing superior stability compared to orpiment- and lapis-based coatings. Gloss measurements and surface roughness analyses demonstrated a strong negative correlation, with yellow lacquer exhibiting the most severe gloss loss (≈30%) and roughness increase (≈89%), consistent with scanning electron microscopy observations of microcracking and surface deterioration. Fourier-transform infrared spectroscopy (FTIR) indicated pigment-dependent oxidative degradation, characterized by intensified carbonyl and aromatic C=C bands. Collectively, the results confirm that mineral pigments strongly influence the optical, chemical, and structural stability of lacquer coatings. From a conservation perspective, cinnabar-based lacquers exhibit higher resilience, whereas orpiment- and lapis-colored coatings are highly vulnerable, underscoring the need for pigment-specific preservation strategies for lacquerware cultural heritage.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Qi Dong,Siyu Xiong,Xiongwei Dong,Yihang Tang,Xuan Dai,Peng Chen,Zhaowei Zhang
Current surgical adhesives struggle with slow curing, weak wet adhesion, and a lack of antimicrobial properties, leading to ineffective hemostasis and infection control. We developed a novel light-activated chitosan hydrogel (GTCS) through initiator-free photopolymerization via disulfide ring opening. Unlike toxic acrylate-based systems requiring photoinitiators, this method eliminates cytotoxicity risks in existing photopolymerized biomaterials. The GTCS is dual-functionalized with gallic acid (GA) and α-thioctic acid (TA), enabling fast initiator-free photopolymerization (11 s) under UV light. The optimized GTCS2 hydrogel demonstrates superior adhesion strength (31.40 ± 5.09 kPa) and shows broad-spectrum antibacterial efficacy (>98 % killing against E. coli and S. aureus ) via membrane disruption and ROS generation. Crucially, GTCS2 achieves hemostasis in 32 ± 3.6 s (vs. 158.33 ± 13.05 s for gelatin sponge) with a 70 % reduction in blood loss (0.81 ± 0.16 g vs. 2.62 ± 0.42 g). In infected wounds, it accelerates healing (93.23 % closure at day 14 vs. 86.05 % of commercial 3 M dress) by suppressing bacterial colonization, scavenging pathological ROS, and modulating pro-inflammatory cytokines (TNF-α, IL-6). Integrating injectability, rapid light-triggered curing, robust adhesion, and intrinsic antibacterial/antioxidant activity, this multifunctional platform offers a transformative solution for emergency hemorrhage control and infected wound management.
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiaxia Yang,Lili Wang,Xian Chen,Biyang Ling,Jianxi Xiao
Osteochondral defects pose a significant clinical challenge, requiring the regeneration of both articular cartilage and subchondral bone across a continuous gradient of composition and mechanical properties. Here, we present BioGraOstO, a digital light processing (DLP)-based 3D bioprinted scaffold for constructing biomimetic osteochondral organoids with precisely graded architectures. Three photo-crosslinkable, cell-laden bioinks were engineered to emulate native osteochondral zones: methacrylated type II collagen and hyaluronic acid for hyaline cartilage (HyaC); 30 % mineralized methacrylated type I collagen for calcified cartilage (CalC); and 60 % mineralized methacrylated type I collagen and hyaluronic acid for subchondral bone (SubB). Sequential DLP bioprinting produced multilayered constructs with well-integrated organic-inorganic interfaces, a modulus spanning 1.35–17.29 kPa, minimal swelling (<10 %), and programmable biodegradation over 15 days. The organoids supported region-specific chondrogenic and osteogenic differentiation of bone marrow–derived mesenchymal stem cells (BMSCs) in vitro , confirmed by histology, immunofluorescence, and gene expression. In a rat osteochondral defect model, BioGraOstO implants achieved near-complete restoration of cartilage and subchondral bone within 12 weeks, significantly outperforming acellular scaffolds. This study establishes a versatile and clinically translatable strategy for osteochondral regeneration, leveraging high-resolution DLP bioprinting, graded biomimetic bioinks, and integrated organoid functionality, offering a promising approach for joint repair and next-generation tissue engineering.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xin Huang,Yongqian Cui,Hao Liang,Xiaobo Li,Jenyuk Lohwacharin,Chuanyi Wang
Hydrogel-based solar interfacial evaporation for seawater desalination is limited by inadequate evaporation rates and inefficient light harvesting, particularly under non-perpendicular illumination. Herein, This study introduces a peony-like single-layer graphene oxide (SLGO)/polyvinyl alcohol (PVA) 3D hydrogel evaporator (GPH) featuring a geometric light-trapping architecture. By exploiting synergistic edge curvature gradients and surface aperiodic wrinkles, the GPH induces multiple internal reflections to effectively manipulate the optical path, thereby overcoming the light absorption limitations of conventional evaporators under oblique incidence. Beyond optical management, precisely tuning the SLGO/PVA ratio optimizes the polymer network's hydrogen bonding, which elevates the intermediate/free water ratio to 0.78 and drastically reduces the water evaporation enthalpy to 1248 J g −1 (cf. 2450 J g −1 for bulk water). Consequently, an exceptional evaporation rate of 2.761 kg m −2 h −1 (20% enhancement over conventional homogeneous hydrogels) and energy efficiency of 91.61% are achieved under 1-sun intensity. Crucially, the hierarchical 3D porous architecture facilitates rapid water replenishment and efficient ion diffusion, endowing the evaporator with robust salt-rejection capabilities. Moreover, the GPH demonstrates outstanding mechanical robustness, with a high fracture strain of 800% in uniaxial tensile tests, indicating its resilience and potential for practical application. This work presents a promising pathway for efficient, reliable seawater desalination and offers a novel perspective for next-generation interfacial solar evaporation technologies.
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