CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhiqing Zhang,Guoliang Zhuang,Hangyu He,Siyang Liu,Shiguo Li,Junzi Li,Tingchao He,Fanghao Ye,Shuting Fan,Guijun Li
The soft nature of perovskite lattices enables precise modulation of crystal structures through A-site cation doping to tailor electronic band structures and carrier dynamics. However, there remains a lack of lattice distortion control methods capable of stabilizing octahedral distortion levels without inducing excessive lattice deformation as doping concentrations increase. This study systematically investigates the effects of A-site cations with varying radii on lattice distortion when incorporated into quasi-2D blue perovskite lattices. It was found that smaller ethylamine (EA) cations lead to uncontrollable lattice strain, while larger triethylamine (TA) cations fail to effectively regulate lattice distortion. In contrast, diethylamine (DA) cations induce self-constrained lattice strain independent of cation concentration. This self-constrained lattice tuning approach optimizes optical performance by significantly enhancing radiative recombination efficiency. Consequently, blue perovskite light-emitting diodes (PeLEDs) were successfully fabricated, achieving a record external quantum efficiency (EQE) of 14.15%. The self-constrained strategy offers substantial design flexibility for developing high-performance quasi-2D blue PeLEDs.
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Journal of Materials Chemistry C
·
2025
·Vol. 13
·期 20
·10390-10398
·
IF 5.1
Yi Xu,Xuewan Lin,Jiyou Zhong
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have emerged as ideal light sources for a variety of advanced spectroscopy applications, demonstrating the importance of developing efficient NIR phosphors. In this work, a Ti4+-containing garnet, Na2CaTi2Ge3O12, was selected as the host material to minimize the ionic size mismatch after Cr3+ substitution. Interestingly, this substitution generates charge self-balance, enabling excellent efficiency of the developed material. Under 465 nm excitation, it exhibits broadband emission covering the first NIR window (λem,max = 790 nm) with a full width at half maximum (FWHM) of 120 nm. The optimized sample achieved a photoluminescence quantum yield (PLQY) of 75%. Moreover, a NIR pc-LED device was fabricated by combining the optimized phosphor with a blue (λem = 455 nm) InGaN chip. Upon application of a driving current of 100 mA, the device demonstrated a NIR output power of 18.24 mW and a corresponding NIR photoelectronic conversion efficiency of 6.49% and exhibited excellent performance in biological tissue imaging and non-destructive testing. Therefore, this work provides an efficient NIR phosphor, which has promising potential in spectroscopy applications.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Chenxi Feng,Yixuan Wang,Jinxue Cheng,Jing Cui,Tian Jiang,Minjie Guo,Yingcheng Li,Zhi Fan
Hydrophobicity is essential for the stability of aerogels, especially when the aerogels are utilized as electromagnetic interference (EMI) shielding materials in the aerospace and electronic communication fields. We used 4,4′-diaminodiphenyl ether (ODA) and 2,2-bis-trifluoromethoxy-biphenylenediamine (TFMOB) as diamine monomers and used 1,2,4,5-benzenetetracarboxylic anhydride (PMDA) as a dianhydride monomer to prepare polyamide acid ammonium salt wet gels; then the hydrophobic polyimide (PI) aerogels were obtained via the fast-freezing and slow-freezing methods, respectively. Compared with the hydrophilic homo-ODA/PMDA aerogel, both fPI-5 and sPI-5 (with 50% TFMOB) exhibited high hydrophobicity with a contact angle of about 126°. To endow fPI-5 and sPI-5 with EMI shielding properties, a series of PI composite aerogels have been prepared by loading carboxyl-functionalized multiwalled carbon nanotubes (MWCNTs-COOH) as conductive fillers. The lightweight PI/MWCNTs-COOH composite aerogels (PMCAs) showed high porosity, excellent hydrophobicity (surface contact angle >137°), and prominent thermal stability (with T5% up to 555 °C in nitrogen). In particular, the PMCAs exhibited a superior EMI shielding performance. The EMI shielding effectiveness of the slow-frozen aerogel CsPI-5 (18 phr) could reach 35.7–40.3 dB in the X-band. Meanwhile, the fast-frozen aerogel CfPI-5 (6 phr) possessed outstanding electromagnetic wave-absorbing performance; its minimum reflection loss could reach −59.1 dB at only 3.9 mm thickness in the horizontal direction. This work provides feasible guidance for the preparation of electromagnetic shielding materials.
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PLANT MOLECULAR BIOLOGY
·
2025
·Vol. 115
·期 2
·1-13
·
IF 3.8
Liu Yitong,Liu Shuangrong,Jing Yanjun,Li Jialong,Lin Rongcheng
Seed dormancy enables plants to delay germination until conditions are favorable for the survival of the next generation. Seed dormancy and germination are controlled by a combination of external and internal signals, in which light and ethylene act as critical regulators. However, how light and ethylene are interlinked to control these two processes remains to be investigated. Here, we show that ethylene and its precursor, 1-aminocyclopropane-1-carboxylic acid (ACC), promote seed germination under light. Light facilitates the conversion of ACC to ethylene, in which phytochrome B (phyB) and FAR-RED ELONGATED HYPOCOTYL3 (FHY3) are functionally required. ACC oxidases (ACOs) catalyze the conversion of ACC to ethylene, among which ACO1 is specifically and predominantly expressed in imbibed seeds. Ethylene induces FHY3 protein accumulation in imbibed seeds, whereby FHY3 directly binds to ACO1 promoter and specifically mediates light-promoted ACO1 expression. Light promotes ACO1 protein accumulation. Overexpression of ACO1 significantly promotes seed germination, and almost completely restores the dormant defect of fhy3 loss-of-function mutants. In summary, this study reveals an ethylene-responsive regulatory cascade of phyB-FHY3-ACO1 that integrates external light input with internal factors to regulate seed dormancy and germination.
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WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 8
·1-14
·
IF 3.8
Wang Weixing,Wang Lei,Lv Yincun,Deng Chenchen,Hu Zehui
Abstract As a broad-spectrum antibiotic, chloramphenicol has an important contribution in resisting bacterial diseases. It has been widely used in medicine and animal husbandry, but it has the disadvantages of long-term unreasonable use and slow degradation in nature. Long-term consumption of food contaminated by chloramphenicol will cause serious side effects to human beings. Therefore, it is urgent to establish an effective method to remove chloramphenicol from wastewater. Co/Ni@ZrO 2 photocatalyst with nanosphere structure was prepared by hydrothermal method and used for the degradation of chloramphenicol (CAP).The structure, morphology and optical properties of the samples were characterized by TEM, SEM, XPS, XRD, FT-IR and UV-Vis. Under visible light, 12% Co/Ni@ZrO 2 has good photocatalytic performance for the degradation of chloramphenicol, which may be due to the synergistic effect and nano-limitation effect between Co/Ni and ZrO 2 . When the optimal dosage of catalyst is 50 mg / L and the initial concentration of chloramphenicol is 20 mg / L, the degradation rate is 98.2 % within 150 min. XPS and Raman results showed that there were appropriate amount of oxygen vacancies on the surface of ZrO 2 , which accelerated the electron transfer rate in the system and inhibited the recombination of photoelectron-hole pairs under visible light, thus improving the activation efficiency of dissolved oxygen in chloramphenicol solution. Free radical capture experiments showed that· O 2 - ,· OH, h + were the main active substances for the degradation of chloramphenicol. The possible mechanism of chloramphenicol degradation under visible light was speculated. The results show that Co/Ni@ZrO 2 is a promising photocatalyst for wastewater treatment. Graphical Abstract A schematic diagram of charge separation and transfer during the degradation of chloramphenicol by 12wt % CoNi @ ZrO2 nanospheres
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Botao Hu,Mengxin Liu,Xinan Shi,Daocheng Pan
Metal oxide nanoparticles are commonly used as electron transport layers (ETLs) in quantum dot light emitting diodes (QLEDs) because of their wide band gap, high electron mobility, and appropriate conduction and valence band positions. Currently, ZnO nanoparticles are the most successfully electron transportation material in high-performance QLEDs. However, the positive aging effect is widely observed for ZnO-based QLEDs since the amphiprotic ZnO nanoparticles are not stable under the acidic, basic, and moisture conditions, which limits their applications. In this study, highly dispersible and alcohol-soluble TiO₂ nanoparticles are synthesized by using a non-hydrolytic sol-gel method, followed by a dimethyl sulfoxide post-treatment. The use of colloidal TiO₂ nanoparticles as an ETL yields optimal QLED, with a maximum external quantum efficiency of 12.03%, a highest luminance of 103,420 cd/m², and a current efficiency of 18.06 cd/A. These results reveal that TiO₂ nanoparticles hold great potential as ETL in the future QLEDs.
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Catalysts
·
2025
·Vol. 15
·期 8
·739
·
IF 4
Xiao Ge,Hongrui Ding,Tong Liu,Yifei Du,Anhuai Lu
Photocatalytic redox processes significantly contribute to shaping Earth’s surface environment. Semiconductor minerals exhibiting favorable photocatalytic properties are ubiquitous on rock and soil surfaces. However, the sunlight-responsive characteristics and functions of TiO2, an excellent photocatalytic material, within natural systems remain incompletely understood, largely due to its wide bandgap limiting solar radiation absorption. This study analyzed surface coating samples, determining their elemental composition, distribution, and mineralogy. The analysis revealed enrichment of anatase TiO2and β-carotene. Informed by these observations, laboratory simulations were designed to investigate the synergistic effect of β-carotene on the sunlight-responsive behavior of anatase. Results demonstrate that β-carotene-sensitized anatase exhibited a 64.4% to 66.1% increase in photocurrent compared to pure anatase. β-carotene sensitization significantly enhanced anatase’s electrochemical activity, promoting rapid electron transfer. Furthermore, it improved interfacial properties and acted as a photosensitizer, boosting photo-response characteristics. The sensitized anatase displayed a distinct absorption peak within the 425–550 nm range, with visible light absorption increasing by approximately 17.75%. This study elucidates the synergistic mechanism enhancing the sunlight response between anatase and β-carotene in natural systems and its broader environmental implications, providing new insights for research on photocatalytic redox processes within Earth’s critical zone.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Chen Jiawei,Liu Xiangyu,Cai Bo,Cheng Yuanzhuang,Wen Hao,Zhu Danlei,Xiong Yaonan,Dai Linjie,Yan Xinghua,Xiang Baixu,Luo Xiyu,Feng Wenjing,Du Jiuyao,Dong Shuyue,Shan Qingsong,Chen Shulin,Zeng Haibo,Xiong Qihua,Duan Lian,Ma Dongxin
Perovskite quantum dot light-emitting diodes have rapidly achieved high external quantum efficiencies of over 25%; however, hindered by limited operating stability originating from surface defects or ion migration in quantum dots. Here, we design a lattice-matched anchoring molecule, tris(4-methoxyphenyl)phosphine oxide (TMeOPPO- p ), to anchor the multi-site defects and stabilise the lattice. The target quantum dots exhibit high exciton recombination features with near-unity photoluminescence quantum yields (97%), and the as-fabricated quantum dot light-emitting diodes present a maximum external quantum efficiency of up to 27% at 693 nm, a low efficiency roll-off (over 20% at a current density of 100 mA cm −2 for the typical device) and an operating half-life of over 23,000 h. Besides, the air-processed devices maintain a maximum external quantum efficiency of over 26% with good storage stability. We expect this work to exert a profound influence on rational and on-demand molecule design for perovskite QDs, indicating great promise in optoelectronic applications.
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BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Yu Wang,Hua Fan,Po Keung Wong,Yonghong Wu,Bruce Rittmann
To develop a more green and effective method for tetracycline (TC) removal, a hybrid material (conversion phosphors-TiO 2 , UCPs-TiO 2 ) was coupled with a biofilm to achieve enhanced removal of TC. The removal of TC by biofilm coupled with UCPs-TiO 2 under visible light reached 82%, which was 35% higher than that in treatment using only the biofilm. Extracellular polymeric substance (EPS) promoted the production of hydroxyl radicals by UCPs-TiO 2 , as the EPS acted as an electron transfer medium and accelerated the TC mineralization. Biofilm in the coupled system tolerated TC stress by regulating its antibiotic resistance genes (ARG) and superoxide dismutase (SOD), and allowed it to maintain stable and efficient removal of TC. This study documents a method to couple a hybrid material with microbial aggregates, creating a promising system for removing refractory organics, such as TC, from water. The study also offers insight into the mechanisms underlying TC removal by microbial aggregates combined with new functional materials.
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Nature Photonics
·
2026
·
IF 38.1
Liu Yangyu,Zhou Yuhan,Chang Jianing,Yang Jie,Yuan Dongqin,Xu Weidong,Wang Wang,Li Zhonghua,Feng Xingjiao,Fu Liuchong,Wang Jianpu,Li Zhaosheng,He Bingchen,Yu Tao,Zou Zhigang,Gao Feng,Bao Chunxiong
Thermal evaporation of perovskite films holds considerable promise for the scalable manufacturing and pixel patterning of perovskite light-emitting diodes (PeLEDs). However, the performance of evaporated PeLEDs remains inferior to their solution-processed counterparts due to the lack of effective strategies to regulate perovskite crystallization during vacuum deposition. Here we address this challenge and achieve precise control over crystallization pathways. Dual-amide additives suppress premature perovskite phase formation during deposition and decelerate crystallization kinetics during post-annealing. We realize thermally evaporated near-infrared PeLEDs with a maximum external quantum efficiency of 25.0% for emission at 805 nm, and a T 50 lifetime of 23 h at a driving current density of 100 mA cm −2 . To show the advantages of thermal evaporation in pixelization, we realize monolithic dual-colour-emitting PeLEDs at 805 nm and 759 nm by integrating different PeLEDs on the same substrate and demonstrate dual-wavelength wearable pulse oximetry. This work provides insights into vacuum deposition crystallization dynamics and establishes a crystallization regulation methodology to advance evaporated perovskite optoelectronics.
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ACS Biomaterials Science & Engineering
·
2018
·
IF 4.432
Yang Zhang,Danfeng Wang,Mengyue Gao,Bin Xu,Jiangying Zhu,Weijiang Yu,Depeng Liu,Guohua Jiang
Near-infrared (NIR) light-triggered and separable segmented microneedles (MNs), consisting of lauric acid and polycaprolactone (LA/PCL) arrowheads and poly(vinyl alcohol) and polycaprolactone (PVA/PVP) supporting bases, have been fabricated. A hypoglycemic drug (metformin) and photothermal conversion factor (Cu7S4 nanoparticles) are encapsulated into LA/PCL arrowheads. Due to the dissolution of soluble supporting bases after the absorption of tissue fluid, the separable MNs arrowheads can be embedded into skin after insertion. Under the NIR-light irradiation, the LA/PCL arrowheads exhibit an excellent thermal-ablation change with a low amount of Cu7S4 nanoparticles (0.1 wt %) due to the low melting point of LA and PCL, thus enabling the release behavior of the encapsulated model drug to be photothermally triggered. Compared to the hypodermic injection of metformin, the thermal ablation of separable MNs triggered by NIR irradiation in the current research exhibit an excellent hypoglycemic effect in vivo. It suggests that the NIR-induced thermal-ablation MNs comprise a prospective transdermal drug-delivery system for the precise control of the timing and dosage of a drug that is dependent on NIR administration.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 32
·期 4
·e4231
·
IF 3.581
Xue-Wen Liu,Yang Xiao,Wei-Gen Peng,Li-Jin Zhao,You-Ming Shen,Song-Bai Zhang,Ji-Lin Lu
Two ruthenium complexes containing a new ligand phipz (phipz = 2-(1,10-phenanthroline)-1H-imidazo[4,5-b]phenazine) were designed and synthesized. These complexes were found to inhibit the DNA supercoiled relaxation mediated by topoisomerase I (topo I), cleave DNA under irradiation and bind to calf thymus DNA through intercalative mode. Furthermore, complex 2 shows higher photocleavage activity, topo I inhibition activity and DNA affinity than complex 1 . Additionally, introduction of phenazine unit may be the reason that two complexes exhibit DNA ‘light switch’ behavior. The present work shows that two complexes might be potential as new DNA ‘light switches’, DNA photocleavers and topo I inhibitors.
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