Science Advances
·
2026
·Vol. 12
·期 29
·
IF 13.9
Jiawei Chen,Xiyu Luo,Xiangyu Liu,Boning Han,Danlei Zhu,Yuhang Cui,Xudong Hu,Jiuyao Du,Wenyu Gu,Xinghua Yan,Ye Wu,Yuanzhuang Cheng,Shulin Chen,Xiaoming Li,Lian Duan,Dongxin Ma,Haibo Zeng
Perovskite quantum dots are promising for near-infrared light-emitting diodes, although they face serious challenges in limited operating device lifetime originating from the complex and disordered surface atomic states. Here, we design and use multifunctional zinc(II) 4-aminobenzenesulfonate to mitigate surface structural disorder in quantum dots, thereby achieving high-performance near-infrared light-emitting diodes. Such an additive, with four functional groups and ions (-NH 2 , -S–O, -S=O, and Zn 2+ ), and that shows double hydrogen–bonding effects, can strengthen surface atom termination and mitigate surface disorder, enabling an improved photoluminescence quantum yield of more than 90%. The as-fabricated light-emitting diodes demonstrated narrow electroluminescence spectra with a full width at half maximum of 42 nanometers at 789 nanometers, a maximum external quantum efficiency of 23.11% with negligible efficiency roll-off (as small as 3% at 100 milliamperes per square centimeter), a radiance of 155,851 milliwatts per steradian per square meter, and an operating lifetime of 2298 minutes at an initial radiance of 1,000 milliwatts per steradian per square meter (39,000 minutes for 190 milliwatts per steradian per square meter). This work represents a substantial improvement in radiance, efficiency roll-off, and operating stability compared with the best previously reported near-infrared perovskite quantum dot light-emitting diodes.
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Inorganics
·
2026
·Vol. 14
·期 9
·237
·
IF 3.4
Qi Guo,Pan Hou,Jingjie Cao,Hui Liu,Ge Tian
The selective photocatalytic reduction of O2to H2O2is an attractive route for sustainable H2O2synthesis, yet its efficiency is often limited by the sluggish charge separation and insufficient selectivity of the two-electron oxygen reduction reaction. Here, we develop a conductive 2D Cu3(HHTP)2metal–organic framework (MOF) in which Cu2+sites serve as dynamic redox centers to regulate interfacial electron transfer and O2activation. Upon photoexcitation, photogenerated electrons are preferentially transferred to Cu centers, inducing reversible reconstruction of the local Cu coordination environment. Benefiting from the extended π-conjugated framework and strong interlayer electronic coupling, the accumulated electrons can delocalize over the 2D sheets, facilitating charge separation and suppressing electron–hole recombination. Spectroscopic and theoretical investigations further reveal that the dynamically reconstructed Cu sites promote O2adsorption and activation through electron donation from Cu d orbitals to O2antibonding states, thereby stabilizing the O2−intermediate and favoring the two-electron reduction pathway toward H2O2. As a result, the Cu3(HHTP)2photocatalyst achieves an H2O2evolution rate of 3910 μmol g−1h−1under visible-light irradiation. These findings demonstrate that dynamically regulated Cu electronic structures provide an effective strategy for coupling charge-carrier management with selective O2activation, offering a rational approach to the design of conductive 2D photocatalysts for efficient H2O2photosynthesis.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
·
IF 4.7
Juanru Huang,Runze Tong,Deming Hao,Zhonghui Sun,Yutian Xue,Fanyong Yan
Solid-state luminescent materials based on carbon dots (CDs) have been widely investigated in light-emitting devices because of their excellent optical properties. Severe fluorescence quenching effects, however, induce the self-quenching resistant of CDs. In this work, anti-self-quenching fluorescent carbon dots of B-CDs and YG-CDs were obtained by one-step hydrothermal treatment of phthalic acid and ethylenediamine at different temperatures of 160 °C and 240 °C, respectively. Analytical studies of UV absorption, fluorescence lifetime and fluorescence emission revealed that the solid-state fluorescence of B-CDs and YG-CDs may be related to their lower sp2 structural domain content, while a possible factor affecting the solid-state redshift is the increase of nitrogen-related surface defects. The red-shifted fluorescence of YG-CDs from aqueous solution to solid state is attributed to resonance energy transfer (RET) or reabsorption. Crucially, solid-state emitting B-CDs and YG-CDs have been successfully employed in the assembly of monochromatic LEDs and WLEDs (0.30, 0.29) on UV chips, underscoring their significant potential for advancing solid-state lighting systems integrated with CDs. This work provides an effective strategy for developing anti-self-quenching luminescent materials integrated with CDs for advanced optoelectronic devices.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Runlong Zhai,Lianchen Zhang,Yaru Cheng,Feng Teng,Peng Hu,Haibo Fan,Jiaming Song,Yang Jiao
The utilization of visible light for photocatalytic degradation has always been a key objective in the field of photocatalysis. In this work, we designed and synthesized an efficient visible-light photocatalyst: V 2 O 5 /ZnIn 2 S 4 (VOZ) nanoflower composite structure. The flower-like ZnIn 2 S 4 , self-assembled from nanosheets, was prepared via a hydrothermal method, followed by the in-situ growth of V 2 O 5 nanoparticles on the nanosheets of ZnIn 2 S 4 through a chemical reaction approach. The results from XPS, PL, ESR and other characterization methods revealed that V 2 O 5 and ZnIn 2 S 4 formed an S-scheme heterojunction, enabling efficient carrier separation and migration while retaining the oxidation capability of V 2 O 5 and the reduction capability of ZnIn 2 S 4 . Under visible light irradiation for 80 min, the composite achieved a 97.4 % degradation for methylene blue (MB), outperforming pure V 2 O 5 and ZnIn 2 S 4 by factors of 1.53 and 1.92, respectively. Similarly, VOZ-20 achieved over 90 % degradation of both methyl orange (MO) and rhodamine B (RhB) within 80 min of visible-light irradiation. Additionally, ICP-OES analysis revealed that the solubility of V 2 O 5 in water was significantly reduced after forming a composite with ZnIn 2 S 4 , which helps prevent vanadium ion contamination in aqueous environments. This composite, with its strong redox activity and simple synthesis, is highly promising for visible-light photocatalytic applications.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2018
·
IF 3.649
Yongxian Zhou,Wei Chen,Pengfei Wang,Yimin Zhang
Pure EMT-type zeolite (EMC-2) was synthesized using 18-crown-6 ether as structure direction agent and first applied for deeply purification the trace polar-oxygenated compounds from light olefins as well as studying the removal mechanism. This EMC-2 zeolite crystals exhibited high crystallinity , regular hexagonal platelet morphology mainly with diameter of 3–4 μm, thickness of 350 nm. The N 2 adsorption/desorption analyzer indicated the EMC-2 zeolite had both micropores and inter-particle mesopores . The BET surface area , total pore volume and average pore size were 599.5 m 2 /g, 0.347 cm 3 /g and 2.32 nm, respectively. By dynamic adsorption experiment at room temperature , the results demonstrated that the EMC-2 zeolite could deeply purify the trace polar-oxygenated compounds to below 1 × 10 −6 mol/mol in N 2 or C 2 H 4 flow, and exhibited more excellent purification performance than that of 13X zeolite. The breakthrough time for methanol to 1.18 g EMC-2 zeolite was 73.0 h in N 2 system, and 6.0 h to 0.31 g EMC-2 zeolite in C 2 H 4 system. The cumulative adsorption amounts of EMC-2 zeolite for methanol and propanal in N 2 and C 2 H 4 system were 55.99 mg/g, 113.93 mg/g and 98.17 mg/g, 171.61 mg/g, respectively. Moreover, the regeneration experiment also demonstrated the EMC-2 zeolite had more stable structure and longer lifetime. The in-situ FTIR spectra indicated both the purification processes of EMC-2 zeolite for methanol and propanal were physi-sorption mainly via the interaction between the oxygen lone-pair electrons of impurities and the Na + of EMC-2 zeolite. Therefore, the EMC-2 zeolite had great potentials for future industrial application of trace polar-oxygenated compounds removal from light olefins .
研究领域:
材料科学
·
化学工程
·
吸附技术
·
石化净化
·
沸石合成
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jinyong Hu,Jiawei Zhang,Xing Liu,Hongyu Zhang,Xiong-Xiong Xue,Yong Zhang
The efficient monitoring of toxic nitrogen dioxide (NO 2 ) reveals a great practical significance in terms of environmental protection and human health. Tin disulfide (SnS 2 ) has recently presented bright application prospects for the NO 2 detection owing to its unique physiochemical properties. Unfortunately, the pristine SnS 2 -based gas sensor suffers from inferior selectivity to NO 2 since the emerging cross-response over interfering gases (especially to NH 3 ) at room temperature. Herein, a room-temperature-operated gas-sensitive device based on Au nanoparticles decorated SnS 2 nanosheet was proposed for the highly selective detection towards NO 2 by exploiting visible-light modulation. Benefited from the electronic sensitization and chemical sensitization of Au nanoparticles, the Au/SnS 2 gas sensor presented a visibly enhanced response toward 1 ppm NO 2 compared with pristine SnS 2 gas sensor, while its selectivity to NO 2 over NH 3 only increased by 35%. Further, through effectively modulating the adsorption and reaction behavior of gas molecules by introducing visible-light excitation, the Au/SnS 2 gas sensor manifested an excellent selectivity with 130% gain in detecting 1 ppm NO 2 at room temperature, endowed the robust repeatability and reliable long-term stability. This work thus demonstrates that the visible-light modulation can serve as a promising technique for exploiting highly selective gas-sensitive devices operating at room temperature.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Haobing Zhao,Hailong Hu,Jinping Zheng,Yuan Qie,Kuibao Yu,Yangbin Zhu,Zhiqi Luo,Lihua Lin,Kaiyu Yang,Tailiang Guo,Fushan Li
With tunable emission in the full visible region, the ecofriendly InP quantum dots (QDs) show unique application prospects in light-emitting devices. At present, InP QDs suffer from wide-bandwidth emission, especially for electroluminescence (EL), which hinders their applications in high-performance display devices. Here, we report a facile one-pot synthesis of narrow-bandwidth InP/ZnSeS/ZnS QDs using a safe phosphorus source of tris(dimethylamino)phosphine, in which the ZnSeS inner-shell layer is formed via temperature-gradient solution growth from 240 to 280 °C. The synthesized green QDs have a high photoluminescence quantum yield (PLQY) of 91% and full width at half-maximum (fwhm) of 36 nm. Moreover, the resultant quantum dot light-emitting devices (QLEDs) also show a narrow fwhm of 42 nm, which is the narrowest emission of green InP QLEDs based on a safe phosphorus source reported so far. Further modulation of the electron injection into the device by inserting a thin layer of lithium fluoride results in a peak external quantum efficiency of 5.56%.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 6
·3654-3662
·
IF 3.9
Kailei Lu,Wenhan Han,Gang Cheng,Xinghua Zhu,Shirui Li,Hao Guo,Bosen Gu,Yucheng Ye,Jianqi Qi,Tiecheng Lu
Attaining effective warm white light emitting in functionally advantageous transparent polycrystalline ceramics is vitally important to guarantee the development of both human and botanical systems. In response to this aim, a series of Dy 3+ -doped Y 2 Zr 2 O 7 (YZO) transparent ceramics were prepared via a solid-state reaction and vacuum sintering approach in this work. These fabricated ceramics show high transparency, where the in-line transmittance at 700 nm is about 76%, which is very close to the theoretical limit (78%). In addition, under the excitation of UV light sources (358 and 384 nm), strong warm white light emissions were observed in these YZO:Dy transparent ceramics. The corresponding photoluminescence characteristics and mechanisms of YZO:Dy ceramics are investigated carefully. The Dy-doped YZO ceramics integrate with high transparency and UV-excitable warm white light emission properties, making them promising light-emitting converter materials for light-emitting source applications.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Chengli Wang,Mengqiang Zhang,Hui Yu,Wenjie Zhang,Ge Shi,Xiaomeng Zhang,Zhe Cui,Peng Fu,Minying Liu,Xiaoguang Qiao,Yanjie He,Xinchang Pang
Although tremendous advancement regarding the highly stable metal halide perovskite nanocrystals (PNCs) has been achieved, previous studies were primarily focused on green light-emitting PNCs (i.e., bromine-based PNCs). The stability of chlorine-based PNCs with a violet or blue emission property was still lagging behind that of their bromine-based counterparts. Herein, a nondemanding and versatile strategy for in situ encapsulating all-inorganic chlorine-based PNCs with multifold exceptionally high stabilities was presented. Well-ordered mesoporous silica enabled the confined growth of PNCs in its pores followed by the porosity sealing by tetramethyl orthosilicate hydrolysis, thereby rendering full encapsulation of chlorine-based PNCs in dense silica that originated from high-temperature calcination. This judiciously designed structure imparted enclosed violet/blue emitting PNCs impart with outstanding long-term stability (>1.5 year) with high photoluminescence quantum yield (i.e., 30.4%) in pure water as the result of complete isolation of PNCs from detrimental stimuli, eventually leading to the application in the white light-emitting diode device.
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高影响因子
Advanced Materials Interfaces
·
2023
·Vol. 10
·期 11
·2202513
·
IF 5.4
Chun Qi,Yuao Guo,Yanjun Liu,Dan Luo
An artificial phototropism system with autonomous intelligence is critical for the development of an autonomous light-harvesting system. However, a current technology for artificial phototropism light-harvesting system with the motor system is capable of accurate direction with high efficiency but still limited to bulky and expensive. Inspired by nature, artificial phototropism systems based on photo-responsive smart soft material liquid crystal elastomer (LCE) are developed to follow the light direction but are still limited by a low payload that is not suitable for practical application. Herein, an untethered automatic light-harvesting system with artificial phototropism is proposed. This system combines the advantages of the LCE actuator and electrical control system and is capable of adjusting the solar cell facing the sun automatically through controls of bending and rotation of the LCE tubular actuator to maximize the absorption of solar energy. Compared with the traditional mini photovoltaic panels, the absorption efficiency of solar energy by the light-harvesting system is increased by 27.68% for the whole day and 230.15% in the morning or dawn sunlight with a small incident angle. The proposed untethered automatic light-harvesting system is compact, inexpensive, and can provide a large payload, showing great application potential in solar automation and robot systems, and energy-saving fields.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Muhua Chen,Shang Wei,Jiayi Wu,Jingrun Li,Bo Fu,Xinbao Zhu
Visible light driven antibiotic degradation with metal-organic frameworks (MOFs) has been regarded as a feasible and efficient approach. Herein, Bi-based MOF (CAU-17) was synthesized and used for tetracycline (TC) removal. To enhance the photocatalytic performance, sulfur (S) element was doped on CAU-17 through solvothermal process. Characterization results verified that S element was successfully doped on CAU-17 and distributed uniformly. The introduction of S element could boost the generation of oxygen vacancies and tune the band gap of CAU-17. By optimizing the S content, the band gap energy (E g ) of CAU-17–0.02 S sample (0.02 g thiourea was added during the synthesis) reduces from 3.57 to 3.37 eV compared to pristine CAU-17. In addition, the visible light response was enhanced and the charge transfer resistance was reduced. TC removal tests demonstrated that CAU-17–0.02 S exhibited a removal efficiency of 62.9%, and the degradation rate constant is 1.44 times than that of bare CAU-17. Reactive species trapping experiment indicated h + ,·OH and·O 2 - all promoted the degradation of TC, following the order of h + >·OH> ·O 2 - . Moreover, CAU-17–0 . 02 S presented a good reusability with slight performance loss after four cycles.
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Jove-Journal of Visualized Experiments
·
2023
·
IF 1.2
Yang Li,Yue Wang,Jun Yin,Jin Qian
Precise printing fabrication of bioinks is a prerequisite for tissue engineering; the Jacobs working curve is the tool to determine the precise printing parameters of digital light processing (DLP). However, the acquisition of working curves wastes materials and requires high formability of materials, which are not suitable for biomaterials. In addition, the reduction of cell activity due to multiple exposures and the failure of structural formation due to repeated positioning are both unavoidable problems in conventional DLP bioprinting. This work introduces a new method of obtaining the working curve and the improvement process of continuous DLP printing technology based on such a working curve. This method of obtaining the working curve is based on the absorbance and photorheological properties of the biomaterials, which do not depend on the formability of the biomaterials. The continuous DLP printing process, obtained from improving the printing process by analyzing the working curve, increases the printing efficiency more than tenfold and greatly improves the activity and functionality of cells, which is beneficial to the development of tissue engineering.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）