Advanced Optical Materials
·
2026
·
IF 7.2
Wanling Mao,Siyong Wang,Li Zhang,Yujia Luo,Yuyao Feng,Yunhai Xiong,Yixuan He,Yuhui Dong,Yousheng Zou,Haibo Zeng
Low-toxicity quantum dots (QDs) based on group I-III-VI elements have attracted significant interest due to their color-tunability for wide-gamut displays. Nevertheless, the width of the blue-emitting peak remains considerably broader than those of the green and red counterparts, resulting in degraded color purity, restricted gamut coverage, and diminished energy efficiency in blue-emitting devices. Here, we report spectroscopically pure blue QDs (λ = 465 nm) with an ultranarrow FWHM of 36 nm, achieving excellent color purity for blue-emitting I-III-VI QDs. Employing a two-step hot-injection method with precise thickness control, this approach enables epitaxial growth of an atomically thin 0.35 nm thick AgGaS 2 (AGS) shell on Ag-In-Zn-Ga-S cores. Using in situ HRTEM on systematically synthesized AIZGS@AGS architectures, we directly captured the controlled epitaxial growth of this shell, revealing a clean core–shell interface. The high-crystallinity AGS shell passivates surface defects, narrowing the PL spectrum from 103 to 36 nm. Moreover, systematic In:Zn ratio tuning further affords AIZGS@AGS QDs that exhibit narrow linewidths and continuous spectral coverage across the blue region (465–509 nm). Our study provides an effective approach for high-quality I-III-VI blue QDs, demonstrating significant potential for advanced display applications.
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Advanced Optical Materials
·
2026
·
IF 7.2
Chengyang Liang,Lin Zhang,Delin Kong,Mengqi Zhang,Zhitao Xue,Jianjun Tian
The elimination of redundant surface organic ligands on perovskite quantum dots (PQDs) is a critical procedure for the construction of high-efficiency light-emitting diodes (LEDs). Nevertheless, such ligand removal readily induces undesirable phase transition owing to the intrinsically unstable surface configuration of PQDs, which severely hinders the large-scale manufacturing of high-performance LEDs. Herein, we develop tetrabutylammonium hexafluorophosphate (TBAPF 6 ) surface reconstruction of CsPbI 3 PQDs during di-isooctylphosphinic acid (DSPA) assisted synthesis and purification. The short chain DSPA has strong coordination with PQDs, while TBA + ions are compensated for Cs + surface vacancies, and PF 6 − ions combine onto Pb 2+ sites to stabilize the structure through filling I − vacancies. This strategy substantially suppressed phase transformation during synthesis and purification, thereby enhancing the moisture and oxygen stability of the PQDs to extend the processing window of device fabrication. LEDs fabricated using freshly stored PQD within 7 days showed negligible efficiency degradation, yielding a peak external quantum efficiency (EQE) over 25%. Notably, even after long-term storage for 30 days, the assembled LEDs still achieved a high EQE of more than 22%. Accordingly, this strategy provides a viable pathway for the scalable preparation of wide-processing-window LEDs.
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Polymers
·
2026
·Vol. 18
·期 16
·1981
·
IF 5.8
Dongmei Xie,Xiaodi Mao,Hongyu Li,Xudong Chen,Yuting Li,Hongzhi Liu
To demonstrate the applicability of the “dynamic self-vulcanization of bifunctional monomers” strategy for toughening polylactic acid (PLA), hydroxylated oleic acid (HOA) was synthesized via UV-initiated thiol–ene click chemistry, using oleic acid as the starting material. In the presence of an excess molar quantity of hexamethylene diisocyanate (HDI), the dynamic self-vulcanization of bifunctional monomers was employed to design PLA blends featuring extraordinary impact toughness. During the one-pot melt compounding, in situ formation and self-crosslinking of flexible poly(urethane-co-amide) (HPUA) toughening phase, together with its reactive compatibilization with the PLA matrix, were simultaneously accomplished. The aggregation of the HPUA domains enabled the morphological transformation of the PLA blend from a sea-island structure to a partially or fully bi-continuous one. At HPUA contents of 20 wt% or higher, the blend exhibited a bi-continuous morphology with a crosslinked HPUA network, attaining a notched impact strength exceeding 110 kJ/m2and an elongation at break above 200%. In particular, when the HPUA content reached 20 wt%, the resulting PLA blend exhibited optimal impact toughness, with a notched IS of 132.1 kJ/m2(30.7 times that of neat PLA). The primary toughening mechanism was determined to be the internal cavitation of the HPUA domains, which subsequently initiates the yielding of the surrounding PLA matrix. This study proposes an applicable and facile method for fabricating polymer materials that possess excellent impact toughness.
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高影响因子
ACS Nano
·
2026
·Vol. 20
·期 34
·23716-23728
·
IF 17.3
Zeng Qing,Tamtaji Mohsen,Zhou Rui,Zhou Tao,Guo Zhengxiao,Chen GuanHua,Tse Edmund C. M.
Electrocatalytic oxidation of glycerol toward high-value
C3 products
on Pd-based catalysts presents a promising strategy for upgrading
and converting glycerol. However, C3 intermediates often adsorb too
tightly on Pd-based catalyst surfaces during glycerol oxidation, leading
to C–C bond cleavage. Herein, cubic-shaped PdBi nanoparticles
with tunable Ni doping levels are successfully synthesized through
a one-step solvothermal method. Owing to the downshift of d-band center
originating from the introduction of Bi and Ni as well as the cubic
shape, the PdBiNi ternary nanocubes (NCs) exhibit excellent electrocatalytic
performance for the glycerol oxidation reaction (GOR). Specifically,
Pd 83 Bi 12 Ni 5 NCs with the lowest d-band
center exhibit a specific activity of 61.12 mA cm geo –2 and a mass activity of 5.34 A mg Pd –1 . Notably, the Faradaic efficiency (FE) toward C3
products exceeds 97%. In situ Fourier transform infrared spectroscopy
and density functional theory calculations show that key C3 intermediates
are easily desorbed from the catalyst surface, thereby suppressing
C–C bond cleavage and thus preventing overoxidation into low-value
products. In addition, Pd 83 Bi 12 Ni 5 NCs possess long-term durability over the course of 16 cycles (1
h/cycle) with an FE for C3 products between 92.5% and 97.6% upon scale-up
deployment in a flow electrolyzer, validating its feasibility in practical
operations.
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ACS Catalysis
·
2026
·Vol. 16
·期 17
·17145-17155
·
IF 13.6
He Ye,Liu Huiyu,Sheng Jianping,Du Chenyu,Moghadam Majid,Sun Yanjuan,Dong Fan
Halide perovskite nanocrystals are promising photocatalysts for CO 2 reduction due to their strong light absorption, defect tolerance, and tunable excited-state properties, but their practical performance remains limited by tightly bound excitons, rapid charge recombination, and inefficient interfacial electron delivery. Here, we report an anthraquinone (AQ)-modified CsPbBr 3 nanocrystal photocatalyst (CPB/AQ) in which the redox-active π-conjugated AQ ligand functions as an interfacial electron relay and molecular electric-field modulator. Experimental and theoretical analyses collectively reveal that AQ creates an additional interfacial charge-transfer pathway, strengthens the light-induced surface potential difference from 170 to 270 mV, and decreases the exciton binding energy from 44.05 to 40.74 meV. Consequently, CPB/AQ achieves a CO yield of 433.50 μmol g –1 within 3 h under AM 1.5G irradiation, 4.54 times that of pristine CPB, and maintains stable CO evolution during a 25 h test. Isotopic 13 CO 2 tracing verifies that CO originates from CO 2 reduction, while in situ FTIR spectroscopy demonstrates enhanced CO 2 adsorption/activation and accelerated formation of *COOH and *CO intermediates on CPB/AQ. This work highlights molecularly gated interfacial electric-field regulation as an effective strategy for overcoming charge-transfer bottlenecks in perovskite nanocrystal photocatalysis.
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PROGRESS IN SOLID STATE CHEMISTRY
·
2026
·
IF 9.7
Mengping Wang,Shiyu Wang,Xinxin Liu,Zhenyi Yu,Guangjiu Zhao
Green antisolvents and ligands synergistically direct perovskite phase evolution. • Spectroscopic analyses reveal solvent-dependent ligand dissociation mechanisms. • Distinct phases enable antibacterial and dynamic anti-counterfeiting applications. In this work, we propose a ligand–antisolvent synergistic regulation strategy to synthesize Cs–Pb–Br materials with dual antibacterial and encryption functions. An amphiphilic ligand derived from 5-bromovaleric acid (5-BVA) and oleamide (OAm) is employed with two green antisolvents (water and ethanol). The use of water as an antisolvent yields high-purity CsPbBr 3 quantum dots (QDs) with water stability exceeding 50 days. These QDs exhibit potent antibacterial activity through electrostatic interactions with bacterial cell membranes achieving up to 99.8% inhibition at a low concentration of 120 μg/ml. In contrast, ethanol as the antisolvent leads to a mixed CsPbBr 3 /CsPb 2 Br 5 phase. This mixed phase exhibits water-triggered fluorescence activation originating from CsPbBr 3 recrystallization alongside a thermal quenching effect that enables reversible on–off fluorescence switching upon cooling–heating cycles. This water-induced fluorescence activation effect combined with reversible thermal quenching properties enables multi-level encryption. Ultimately this ligand-antisolvent synergistic regulation strategy not only offers theoretical guidance for the rational and tailored design of multifunctional perovskites but also establishes a foundation for their practical applications in complex optoelectronic and biological environments.
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CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Huining Huang,Huiliang Li,Zeyan Wang,Peng Wang,Zhaoke Zheng,Yuanyuan Liu,Ying Dai,Yingjie Li,Baibiao Huang
In this work, we fabricated NaYF 4 :Yb 3+ ,Tm 3+ @NaYF 4 :Yb 3+ ,Nd 3+ @TiO 2 (Tm@Nd@TiO 2 ) core@shell nanoparticles and investigated their near-infrared (NIR) photocatalytic activities. Comparing to traditional TiO 2 based upconversion (UC) photocatalysts (i.e., NaYF 4 :Yb 3+ ,Tm 3+ @TiO 2 , named Tm@TiO 2 ), Tm@Nd@TiO 2 exhibits enhanced photocatalytic activity under NIR light irradiation. The photocatalytic activity of Tm@Nd@TiO 2 under 980, 808, and 980 + 808 nm laser irradiation is 4.40, 5.84, and 9.83 times as high as that of Tm@TiO 2 under only 980 nm irradiation, respectively. The ethylene degradation rate of Tm@Nd@TiO 2 under 980 + 808 nm laser irradiation is 6.4 times as that of Tm@TiO 2 . The photocatalytic activity of Tm@Nd@TiO 2 under visible + NIR irradiation is even comparable with (∼2/3) that under UV light irradiation during Rhodamine B (RhB) degradation. The enhanced photocatalytic activity of Tm@Nd@TiO 2 can be attributed to the stronger light absorption in NIR region ascribed to Nd 3+ , lower water absorption and the enhanced UC emission of Tm@Nd with unique core@shell nanostructures. This work can provide a possible route to improve the NIR photocatalytic activity and stimulate the applications in many other fields.
研究领域:
材料科学
·
光催化技术
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 5
·1307-1315
·
IF 6.641
Bin Zeng,Fei Chen,Zhenyang Liu,Zhongyuan Guan,Xu Li,Feng Teng,Aiwei Tang
Herein, we demonstrated a seed-mediated growth method for the synthesis of ternary AgInS2 (AIS) and quaternary Ag–In–Zn–S (AIZS) nanocrystals (NCs) by means of a partial cation exchange with In3+ and Zn2+ ions. Binary Ag2S NCs with different sizes were synthesized first, which then acted as the seeds to prepare different-sized AIS NCs through the incorporation of In3+. The formation mechanism of AIS NCs was studied in terms of the temporal evolution of the morphology and crystal structure, and the heterostructured Ag2S-AIS NCs were formed as intermediates during the growth process of AIS NCs. Variation in the Ag/In feeding ratios from 1 : 1 to 1 : 3 led to a broad tuning of the optical band gap and photoluminescence (PL) maximum of AIS NCs, in which very small-sized AIS NCs with a tetragonal phase were obtained. Subsequently, the incorporation of Zn2+ into AIS NCs resulted in the widening of the optical band gap and the shift of the PL maximum to higher energy with the enhancement of the absolute PL quantum yields (PLQYs). When the reaction temperature was increased, the PL emission maximum could be tuned from 2.04 to 2.33 eV and the absolute PLQYs could be tuned from 16% to 58%. Time-resolved PL spectroscopy was used to study the PL decay dynamics of the AIS and AIZS NCs, and the PL emission was related to the recombination of the surface-related states, intrinsic defects and donor–acceptor (D–A) pairs. The ternary and quaternary Ag-based semiconductor NCs have long-lived excitons, which may have promising applications in the field of energy conversion.
研究领域:
材料科学
·
纳米技术
·
光学
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