ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Gaosi Han,Andy Berbille,Yueming Zhang,Xiongxin Luo,Longyi Li,Lin-Dong Liu,Zhong Lin Wang,Laipan Zhu
The flexoelectric effect, a polarization phenomenon unrestricted by material symmetry, holds great promise for next-generation energy harvesting and sensing. However, conventional flexoelectric devices require external mechanical stress, which severely limits their practical applicability. Here, we present a heterojunction-based dual-mode flexoelectric nanogenerator that is driven by light and heat, requiring no external mechanical or electrical input. Under illumination (photodetection mode) or temperature variation (thermal response mode), the heterojunction components undergo differential deformation, generating a pronounced interfacial strain gradient that drives strong flexoelectric polarization and flexo-photovoltaic currents. The photodetection mode demonstrates a broad spectral response from 250 to 600 nm, with a peak responsivity of 2.2 mA W −1 . The thermal response mode exhibits an effective pyroelectric coefficient as high as 7518 µC m −2 K −1 , surpassing conventional pyroelectric materials by over an order of magnitude. By eliminating the need for external stress, this work enables direct coupling among optical, thermal, mechanical, and electrical energies, opening a new avenue for self-powered photodetectors and thermal sensors based on flexoelectricity.
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ChemCatChem
·
2026
·Vol. 18
·期 9
·e70761
·
IF 4.1
Mengdie Cai,Yulu Xu,Yao Lu,Qi Jin,Yongshuai Chen,Jia-qi Bai,Fang Chen,Zhimin Song,Song Sun
Developing efficient visible-light-driven photocatalysts for overall water splitting remains a significant challenge. Herein, Sn/Cr co-doped SrTiO 3 (SCSTO) was synthesized via a flux-assisted solid-state reaction, with Sn substituting Sr sites and Cr replacing Ti sites in the perovskite lattice. Sn/Cr synergistic co-doping extends optical absorption into the visible region, narrows the bandgap to 3.04 eV, suppresses Ti3+ defects and oxygen vacancies, and promotes charge separation and migration. Benefiting from the rational band structure and defect engineering, under visible-light irradiation (λ > 380 nm), the optimal SCSTO exhibits a hydrogen evolution rate of 15.4 µmol·h − 1 and oxygen evolution rate of 7.34 µmol·h −1 , with outstanding cycling stability. DFT calculations confirm that Cr 3d mid-gap states below the Ti 3d conduction band enhance visible-light response and charge transfer. This work provides a universal and feasible co-doping strategy for designing high-performance perovskite oxide photocatalysts toward efficient solar fuel production, which is instructive for the development of advanced visible-light-driven photocatalytic systems. Graphical A synergistic Sn/Cr dual-site co-doping strategy was developed for SrTiO 3 to enable efficient visible-light-driven overall water splitting.
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Journal of the American Chemical Society
·
2026
·
IF 16.6
Xiaoli Xia,Fang Wang,Changju Yang,Yujie Wen,Xiang Ning,Zhengting Zhang,Juan Wen,Zhonghan Feng,Xiaokang Ke,Zhiwu Yu,Hanxi Guan,Wenhua Hou,Xuefeng Guo,Weiping Ding,Di Wu,Yadong Li,Luming Peng
Light-element isolated species represent an emerging class of atomically dispersed nanomaterials, yet their precise local and higher-shell coordination environments remain largely inaccessible due to the intrinsic limitations of conventional nanoscale probes. Here, we establish a solid-state NMR method, combining 23Na and 17O spectroscopy with first-principles calculations, to directly resolve the atomic-scale structure of light-element isolated species beyond the first coordination shell. Using Na-modified CeO2 as a representative system, isolated and aggregated sodium species are distinguished by characteristic 23Na NMR signatures, while 17O NMR further reveals how light element dopants perturb oxygen coordination across the first to third atomic shells. This approach enables clear differentiation of Na–O–Ce linkages from more remote Na–O–Ce–O environments that are inaccessible to electron microscopy and X-ray-based techniques. As a demonstration of atomic-scale structure-adsorption correlation, CO2 is shown to preferentially adsorb at Na–O–Ce sites rather than at Na–O–H groups.
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Journal of Physical Chemistry Letters
·
2026
·
IF 4.5
Yuan Qie,Kai Xie,Chengxiang Zhao,Xiao Yang,Hailong Hu
Direct photolithographic patterning of quantum dots (QDs) through polymer cross-linking enables a ligand-nondestructive route for fabricating integrated optoelectronic devices. Herein, a photosensitizer-free, self-cross-linkable polymer is employed, which forms a three-dimensional network upon UV irradiation, effectively confining QD nanoparticles and enabling high-precision QD arrays. Furthermore, this polymer seamlessly constructs a charge barrier layer surrounding the QD arrays, which effectively suppresses the leakage current in QD light-emitting devices (QLEDs). By incorporation of a dual-layer electron transport architecture, the flexible QLEDs achieve a peak external quantum efficiency of 10.4%. These findings demonstrate a viable and scalable approach for the fabrication of full-color, high-resolution QLEDs via direct photolithography.
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高影响因子
iScience
·
2026
·Vol. 29
·期 6
·
IF 4.5
Ziyu Wang,Xuejie Han,Baohao Qian,Xiulai Zhang,Jingyuan Ma,Ru Feng,Meiqin Shi,Guangbo Chen,Fanfei Sun
Photothermal catalytic reduction of CO 2 to CO has been regarded as a promising strategy for solar-to-chemical energy conversion, yet the dynamic evolution of active sites under realistic reaction conditions remains poorly understood. Herein, we synthesized CuO/ZnO (CuZnO) catalysts with intimate interfacial contact via co-precipitation followed by calcination method. Under photothermal conditions, CuZnO underwent in situ reconstruction into low-coordinated metallic Cu in close contact with ZnO, delivering a CO generation rate of ∼18.1 mmol g −1 h −1 with a selectivity as high as 99% at 200 °C, outperforming that achieved under purely thermal conditions. Operando photothermal X-ray absorption fine structure (XAFS) spectroscopy revealed the real-time evolution of both Cu and Zn coordination environments in CuZnO, illustrating the formation and stabilization of metallic Cu on ZnO during photothermal catalysis. This study elucidates the mechanisms underlying photothermal synergy in CO 2 reduction and provides mechanistic insights into active-site dynamics under photothermal conditions.
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ACS ES&T Engineering
·
2026
·
IF 6.3
Yao Chen,Tianle Hu,Jianwei Ai,Quansheng Zhou,Xinyi Su,Yuchen Zhang,Hanchen Zhang,Shuhui Guan,Zhenfeng Bian,Hiromi Yamashita
Photocatalytic dissolution of precious metals (PMs) relies critically on the generation of specific reactive intermediates; however, the rational control of radical species in visible light remains challenging. Herein, we introduced the cyano (−CN) group into g-C3N4 (denoted as g-C3N4–CN), achieving a remarkable enhancement in the dissolution efficiency of precious metals under visible light. The −CN group not only promotes the visible-light absorption of g-C3N4–CN, but also facilitates the separation of photogenerated charges. The electron paramagnetic resonance (EPR) spectroscopy further demonstrates that g-C3N4–CN instantaneously generates superoxide radicals (O2•–) via efficient oxygen reduction while simultaneously promoting the rapid production of alkyl radicals (R•) through solvent oxidation. In contrast, pristine g-C3N4 exhibits a sluggish generation of all radical species. The distinct radical generation kinetics of g-C3N4–CN is identified as the key driver for its superior dissolution efficiency, enabling precious-metal recovery rates by 2–4 times and establishing a radical-targeted strategy for sustainable photocatalysis.
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ACS Applied Polymer Materials
·
2026
·
IF 5.2
Li Jiaojiao,Zhang Song,Zhang Yan,Zhang Yuanyuan,Liu Bing,Zhang Yuanming
Indoor air pollution, particularly odorous compounds
like ammonia,
poses a serious threat to human health, highlighting the urgent need
for functional materials with efficient and durable air purification
capabilities. Here, photocatalytic deodorizing polyamide 6 (PA6) fibers
were functionalized with carbon dots/titanium dioxide (C-dots/TiO 2 ) through KH560-assisted interfacial immobilization and were
subsequently woven into Axminster carpets. The addition of C-dots
can effectively extend the visible-light response of TiO 2 and promote the generation of key reactive oxygen species (·OH
and·O 2 – ), which are crucial for
oxidizing ammonia intermediates and bacterial inactivation. The photocatalytic
performance of C-dots/TiO 2 –KH560–PA6 fibers
was evaluated by investigating the effects of different concentrations
of KH560 and C-dots/TiO 2 on ammonia removal, thereby determining
the optimal concentrations for treating PA6 fibers. The prepared functional
carpet demonstrated efficient ammonia removal (85.3% in 3 h under
a light initial concentration of ∼250 ppm, Lighting conditions:
xenon lamp, 150 mW/cm 2 ), excellent washing durability,
and high reusability. Furthermore, the carpet exhibited potent antibacterial
activity. This work presents a feasible strategy for fabricating efficient,
stable, and multifunctional photocatalytic carpets, offering significant
potential for improving indoor environmental quality in diverse settings.
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Advanced Optical Materials
·
2026
·Vol. 14
·期 34
·e71686
·
IF 7.2
Jijun Qian,Xiwen Liang,Zhiguo Nie,Weiwei Meng,Sirui Bao,Xiong Huang,Qichuan Hu,Yulan Huang,Run Xu,Bo Wu,Guofu Zhou,Mingzhu Long
Metal halide perovskites derive their remarkable optoelectronic properties from the combined effects of strong electron-phonon coupling, exciton localization, and the dynamic stereochemical activity of n s 2 lone pairs. However, Ge (II)-based perovskites typically exhibit static lone-pair expression (LPE) and pronounced octahedral distortion, attributed to the second-order Jahn-Teller effect, which leads to severe nonradiative recombination. Here, we demonstrate that incorporating 1-methylpiperazium (MPZ 2+ ), with bidentate coordination sites and balanced polarity, steric effect, and conformational flexibility, can effectively tune the organic-inorganic interactions in a newly synthesized Ge(II)-based zero-dimensional perovskite, (MPZ) 2 GeI 6 , with suppressed LPE in Ge(II) ground states and minimized octahedral distortion. The structural symmetry facilitates strong orbital overlap between Ge 2+ and I − , leading to increased electron-phonon coupling and high defect tolerance. Coupled with the enhanced quantum confinement of isolated 0D [GeI 6 ] octahedra, (MPZ) 2 GeI 6 exhibits a large Stokes shift of 216 nm and a record-high photoluminescence quantum yield of 19.1% among reported Ge 2+ -based perovskites. Additionally, it demonstrates remarkable resistance to moisture, maintaining structural integrity and photoluminescence even after absorbing 0.5 g of water per gram of material, attributable to the polarity of MPZ molecules that help stabilize water molecules. These findings offer new insights into the structural and optical modulation of Ge-based perovskites.
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Advanced Optical Materials
·
2026
·Vol. 14
·期 33
·e71612
·
IF 7.2
He Huang,Yong Huang,Yang Ma,Qiangwei Wang,Yu Chen,Jiajun Qin,Jinpeng Li,Hui Yan,Xiaoqing Chen,Zilong Zheng
The miniaturization of perovskite light-emitting diodes (PeLEDs) to single-pixel dimension below 10 µm represents a critical challenge for next-generation high-definition displays. Conventional photolithography techniques face fundamental compatibility issues with perovskite materials, while the stability and efficiency of microscale devices are compromised by defect-mediated non-radiative recombination and ion migration effects at reduced dimensions. This work demonstrates a significant advancement in microscale PeLED performance through synergistic optimization of precursor stoichiometry and surface passivation engineering. By employing guanidinium bromide (GABr) as a multifunctional passivator, we achieved simultaneous bulk and surface defect suppression with the formation of a stabilizing 2D/3D heterostructure. The optimized 2 µm PeLED devices exhibited remarkable performance enhancements, achieving a peak external quantum efficiency of 7.4%, current efficiency of 42.3 cd/A, and luminance of 4.6 × 10 4 cd/m 2 . More importantly, the operational service lifetime was extended two orders of magnitude from 3 to 271 s, addressing the fundamental stability limitations that have previously hindered practical applications. This work provides an alternative fabrication pathway that circumvents the size constraints of conventional microfabrication processes, enabling the development of high-performance microscale light-emitting devices for augmented reality, virtual reality, and other advanced display technologies that require ultrahigh pixel densities.
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LANGMUIR
·
2025
·
IF 3.9
Kaifeng Yao,Yingying Zhu,Jijiang Hu,Zhen Yao
Hard and bendable polymer films are critically important in a wide range of applications. It is generally accepted that for polymers, increased cross-linking density leads to enhanced hardness, but often at the expense of bendability. Here, by selecting different UV monomers, thermal post-treatment, and addition of LiCl, a series of polymer films with varied cross-linking densities and bonding architectures were prepared through rapid UV curing. Comparative analysis reveals that, unlike other cross-linking, the introduction of hydrogen bonding effectively enhances surface hardness without deteriorating bending properties in this system. Compared to trimethylolpropane triacrylate, pentaerythritol triacrylate has a hydroxyl group to form hydrogen bonds, exhibiting higher hardness but no decrease in bendability. Upon thermal treatment of 4-acryloylmorpholine, the hardness variation correlates with hydrogen bonding, while the bending radius remains unchanged. The introduction of LiCl leads to the formation of coordination bonds in the polymer, resulting in increased hardness but a reduced bending performance. Contrary to the general understanding, the hardness and bending properties of the polymers were decoupled by introducing hydrogen bonding. This work provides a theoretical basis for the development of advanced functional polymeric materials with an optimized mechanical performance.
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ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Xueqian Yan,Jin Qian,Xiangjun Pei,Lihong Zhou,Rui Ma,Mingkuan Zhang,Yufei Du,Linqin Bai
In this study, a magnetic NiFe 2 O 4 /MWCNTs/BiOI composite were fabricated and applied for enhanced and sustainable photocatalytic degradation of doxycycline (DOX) under UV light irradiation. The as-synthesized material was characterized by a series of techniques and its photocatalytic property was assessed via a couple of batch tests. With the pH at 3.0 and NiFe 2 O 4 /MWCNTs/BiOI loading of 1.5 g L −1 , the DOX degradation (at 45 mg L −1 ) efficiency could achieve 92.18% with the reaction rate constant k of 0.0072 min −1 . The high mineralization of DOX suggests the strong oxidation of both the parent pollutant and the intermediary products in the ternary catalyst system. DRS spectra indicated that compared with BiOI , the introduction of NiFe 2 O 4 and MWCNTs reduces the band gap energy of the NiFe 2 O 4 /MWCNTs/BiOI. The quenching test illustrates that h + , OH and O 2 − all functioned in the developed photocatalytic system, where O 2 − and h + play the dominant roles in DOX degradation. The more efficient electron-h + separation and more oxidizing species induced by UV light resulted in the significant improvement of DOX abatement in the developed coupling system compared with that on either BiOI or NiFe 2 O 4 /MWCNTs. The magnetic property of NiFe 2 O 4 /MWCNTs/BiOI enables its easy separation of the solid catalyst from the reaction solution and the sustainable application in the photocatalysis . Based on the intermediates of DOX decomposition identified by UPLC-MS, the possible degradation routes were proposed accordingly.
研究领域:
环境化学
·
材料科学
·
光催化
·
水污染治理
·
纳米复合材料
·
药物降解
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BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Tong Wang,Wei Jiang,Tao Zhao,Haoxi Ben,Yuanming Zhang,Xiaoli Yang
A visible-light-driven g-C 3 N 4 /TiO 2 heterojunction selectively delignifies raw hemp biomass. • Photogenerated superoxide radicals specifically cleave recalcitrant lignin β-O-4 ether bonds. • The mild ambient and alkali-free process successfully achieves a 69.08 % delignification rate. • This photocatalytic pretreatment preserves cellulose crystallinity and superior fiber strength. The inherent recalcitrance of lignocellulosic biomass, primarily attributed to the dense lignin-carbohydrate complex (LCC), restricts the efficient valorization of plant fibers. Conventional alkaline degumming strategies suffer from high energy consumption, severe pollution, and non-selective cellulose degradation. Herein, a mild, alkali-free pretreatment strategy was developed using a visible-light-driven g-C 3 N 4 /TiO 2 heterojunction to achieve efficient and selective delignification of hemp fibers. Under ambient conditions (30 °C, neutral pH), the system achieved a delignification efficiency of 69.08 % while preserving the cellulose crystallinity (CrI increased to 78.64 %). Crucially, 2D-HSQC NMR and EPR analyses revealed a selective oxidative mechanism: photogenerated superoxide radicals (•O 2 – ) acted as specific nucleophiles, preferentially cleaving the labile lignin β-O-4 ether bonds (from 40.9 % to 13.5 %), while leaving the chemically robust C-C linkages and the cellulose backbone largely intact. Consequently, the pretreated fibers exhibited superior mechanical strength (4.13 cN/dtex) compared to traditional alkaline-treated samples (3.56 cN/dtex). This work provides a sustainable, low-severity paradigm for biomass fractionation, offering fundamental insights into the photocatalytic cleavage of lignin inter-unit linkages. Download: Download high-res image (149KB) Download: Download full-size image
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