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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Small
·
2026
·
IF 11.8
Shundong Cai,Mengdie Li,Jingbin Zhuang,Jinfa Ye,Songyi Wang,Jinglei Zhang,Mingyou Zhang,Qixuan Dai,Yun Han,Min Su,Wei Li,Gang Liu,Chengchao Chu
Uveitis poses a severe threat to vision and represents a critical clinical challenge. Conventional therapeutic approaches often exhibit limited efficacy in controlling disease progression and lack efficient mechanisms for managing localized oxidative stress. Given that molecular hydrogen (H 2 ) holds substantial promise for treating oxidative and inflammatory diseases via its selective antioxidant properties, we report a metal–organic framework (MOF) nanozyme-based hydrogen nanogenerator. This system integrates photocatalytic visible-light-triggered H 2 generation with multi-enzyme-like antioxidant functions for targeted uveitis management. The engineered Pt-embedded MOF nanozymes (Pt@MOF) concurrently catalyze hydrogen evolution under visible light and display superoxide dismutase- and catalase-like activities, achieving comprehensive scavenging of overproduced reactive oxygen species (ROS). Furthermore, camouflaging the nanozyme with M2 macrophage-derived cell membrane vesicles (CMVs) endows the nanoplatform with active inflammation-targeting ability, thereby enhancing the accumulation in inflamed ocular tissues. Following topical administration, this biomimetic nanomedicine successfully mitigates oxidative stress and suppresses pro-inflammatory cytokines both in vitro and in a rat model of acute uveitis. Overall, this study underscores the immense potential of integrating light-driven hydrogen therapy with nanozyme therapy, offering a highly effective strategy that could revolutionize future therapeutic interventions for inflammatory eye diseases.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Qing Yang,Zehan Su,Xinyu Li,Yiqi Yuan,Zhishan Su,Hongjian Yan
β-Ketoenamine TpABN is incorporated into CTF-1 via eutectic-salt ionothermal synthesis. • The strategy repairs surface defects, suppresses carbonization, and extends absorption to ∼700 nm. • The keto–triazine donor–acceptor structure promotes charge transfer and carrier lifetime. • CTF-TpABN achieves 3485 ± 64 μmol g −1 h −1 visible-light H 2 evolution. • CTF-TpABN shows 4- or 27-fold higher H 2 evolution and improved O 2 evolution than CTF-MS or CTF-TfOH. Covalent triazine frameworks (CTFs) are promising photocatalysts for water splitting, but weak visible-light absorption and inefficient charge separation caused by intrinsic structural constraints limit their activity. Herein, a β-ketoenamine-based molecule, TpABN, is incorporated into the CTF-1 backbone via low-temperature ionothermal synthesis employing a ZnCl 2 –NaCl–KCl ternary eutectic salt-catalyzed method. This strategy repairs surface defects, suppresses carbonization, and extends the optical absorption edge to ∼700 nm. The resulting keto–triazine donor–acceptor architecture promotes intramolecular charge transfer and prolongs the excited-state carrier lifetime. Consequently, CTF-TpABN achieves a 4-fold higher photocatalytic H 2 evolution rate(3485 ± 64 μmol/g/h) than CTF-MS (without β-ketoenamine modification) and a 27-fold higher rate than CTF-TfOH (synthesized via TfOH catalysis) under visible light (λ > 400 nm, 3 wt% Pt cocatalyst, 10 vol% TEOA). It also shows improved visible-light O 2 evolution (λ > 400 nm, 2 wt% RuO x cocatalyst, 0.05 M AgNO 3 ). These findings highlight CTF-TpABN as a promising visible-light-driven water-splitting photocatalyst and guide CTF-based photocatalyst design. A β-ketoenamine-based molecule (TpABN) is integrated into CTF-1 via a ternary eutectic salt-catalyzed ionothermal method to enhance visible-light absorption and charge separation. The resulting CTF-TpABN shows suppressed carbonization, extended absorption to ∼700 nm, and 27-fold improved H 2 evolution. This study offers insights into designing efficient photocatalysts for visible-light-driven water splitting. Download: Download high-res image (228KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·125215
·
IF 7.5
Song Hou,Ruonan Guo,Yan Zhang,Shengwang Gao,Changsheng Guo,Jian Xu
BiOBr/ZnFe 2 O 4 couples visible-light bisphenol S (BPS) removal with magnetic recovery. • BPS removal at 60 min ranged from 69.2% to 99.0% across four spiked water matrices. • Scavenger and probe tests support oxygen-dependent and radical-mediated oxidation. • BPS removal remained at 95% in the fifth cycle after methanol regeneration. • Residual acute toxicity persisted after near-complete parent BPS removal. Bisphenol S (BPS) removal was investigated using a magnetically recoverable BiOBr/ZnFe 2 O 4 composite under visible-light irradiation. Among four nominal feed mass ratios, ZnFe 2 O 4 :BiOBr = 1:4 gave the highest activity, achieving 97.1% BPS removal within 40 min at a catalyst dose of 1.0 g L −1 and an initial BPS concentration of 5 mg L −1 . Its apparent rate constant of 0.091 min −1 was approximately 2.0 and 14.2 times those of pristine BiOBr and ZnFe 2 O 4 , respectively. The composite exhibited a saturation magnetisation of 28.8 emu g −1 , with visible magnetic clarification by 30 s. Removal at 60 min decreased from 99% to 95% over five cycles involving methanol washing without catalyst replenishment, while the principal crystalline phases were retained. Scavenger responses and terephthalic-acid probe fluorescence supported oxygen-dependent and radical-mediated oxidation. Across four BPS-spiked water matrices, 60-min removal ranged from 99.0% in distilled water to 69.2% in wastewater-treatment-plant effluent. Aliivibrio fischeri luminescence inhibition rose from 13.32 ± 1.17% initially to a highest sampled mean of 31.37 ± 2.70% at 20 min and declined to 22.39 ± 1.36% at 90 min (mean ± standard deviation, n = 3), showing persistent residual acute toxicity despite parent-compound removal. The results demonstrate the combined benefits of visible-light activity and magnetic recoverability, while identifying water-matrix inhibition and residual toxicity as constraints on further process development.
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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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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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