APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Dexu Zhang,Xiaoying Peng,Jie Zhang,Shixuan Zhu,Zhihong Xue,Shubin Xiong,Shuai Xiong,Bo Sheng,Yiqiang He,Guiming Peng,Jiadong Zhang
Graphitic carbon nitride (g-C 3 N 4 ) has become a favored universal photocatalyst. Despite its numerous advantages, the photocatalytic efficiency of g-C 3 N 4 is hindered by the substantial recombination of photoexcited charge carriers and holes. In this work, we demonstrate that Zn-doped tubular carbon nitride photocatalyst (Zn-tCN) can serve as highly efficient catalysts for H 2 O 2 photosynthesis. Mechanism studies confirm that the presence of Zn in g-C 3 N 4 prolongs the lifetimes of photogenerated carriers and inhibits their recombination, which triggers the reduction of O 2 to reaction intermediates ( O 2 − ), as supported by in situ electron paramagnetic resonance (EPR) spectroscopy. More importantly, sacrificial agent experiments coupled with in situ EPR results confirmed that the reaction mechanism involves a concerted two-electron transfer process. The optimal catalyst displays a H 2 O 2 productivity of 162.4μmol g –1 h −1 under visible-light irradiation without a sacrificial agent, which is 11.7 times higher than that of pristine g-C 3 N 4 (13.8μmol g –1 h −1 ). This work proposes a synthetic strategy for the preparation of high-performance Zn-doped g-C 3 N 4 , which offers insights and perspectives for developing highly active photocatalysts and deepening the understanding of photocatalytic mechanisms.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Congcong Wang,Boya Liu,Guorong Wang,Zhiliang Jin
The fabrication of an S-scheme heterojunction represents a highly effective approach for achieving efficient and environmentally friendly artificial photosynthesis. In this study, a highly efficient S-scheme heterojunction was developed by modifying ZnIn 2 S 4 , a kind of chrysanumi-like flower, with a two-dimensional sheet of AgCoO 2 by physical grinding method, which realized H 2 generation and H 2 O 2 generation under visible light conditions. AgCoO 2 exhibits significant potential as a cocatalyst owing to its narrow band gap, black appearance, and robust stability. Because of the difference in Fermi levels, the two-dimensional AgCoO 2 and three-dimensional ZnIn 2 S 4 are closely fitted to accelerate the charge migration between the interfaces, thus improving the photocatalytic properties of the materials. In-depth investigations utilizing in situ X-ray photoelectron spectroscopy alongside additional experimental methodologies have definitively illuminated the intricate charge partition and migration dynamics operative within the S-scheme heterojunction interface between the two catalysts. Photochemistry and photoluminescence spectroscopy further confirmed that the formation of heterojunction accelerated the migration of photogenerated charge carriers, and electron spin resonance provided further evidence for the active substances in the reaction. This study has made additional advancements in the development of efficient S-scheme heterojunction materials for driving photocatalytic water cleavage.
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eScience
·
2025
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IF 36.6
Yuqing Su,Jike Ding,Zuolin Zhang,Mengjia Li,Jiangzhao Chen,Jian-Xin Tang,Thierry Pauporté,Cong Chen
Despite significant advancements in improving the power-conversion efficiency (PCE) of exceeding 27% in perovskite solar cells (PSCs), the insufficient operational stability of PSCs under illumination remains a critical challenge, posing a major obstacle to their commercial viability. This paper proposes a feasible hindered amine stabilization strategy (HASS) by using a hindered amine light stabilizer for grain and surface modulation of perovskite, thereby blocking the internal and external degradation pathways of perovskite. Its piperidine ring is easily oxidized to form Nitrogen monoxide (N–O•) radicals after absorbing light energy in an aerobic environment. The free superoxide radical (O 2 • − ) radicals react with perovskite and H + in the decomposition products of perovskite, thereby improving the light stability of the device. In addition, the contained triazine and morpholine functional groups can coordinate with Pb 2+ , thereby reducing the interface defects and inhibiting the non-radiative recombination. The HASS-modulated PSC could reach the champion PCE of 26.74% (certified 26.56%), which is remarkable for inverted PSCs prepared under ambient conditions. Further, the unencapsulated device could maintain 95.4% of its initial PCE after more than 1000 hours of aging at maximum power point tracking.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Mengli Zhang,Haihan Song,Yaoqian Feng,Zhefeng Qian,Ning Huang,Zhengwei Mao,Weijun Tong
Reactive oxygen species (ROS) play a fundamental role in antibacterial therapeutic strategies. However, excessive ROS generation can disrupt redox homeostasis and induce a severe inflammatory response, causing immense stress on surrounding cells and tissues. Herein, an intelligent nanoheterojunction established with Prussian blue (PB) and manganese polyphthalocyanine (MnPPc), PB@MnPPc (PM), was established to achieve sequential antibacterial and anti-inflammatory functions via controllable ROS regulation. With spatiotemporal control of near-infrared (NIR, 808 nm) light, PM demonstrates the potential for on-demand generation and scavenging of ROS. When exposed to NIR irradiation, PM exhibits prominent bactericidal abilities, which result from its augmented singlet oxygen generation capacity and photothermal effects. These advantages originate from the narrow band gap as well as the enhanced electron-hole separation and transfer efficiency enabled by its unique heterostructure. Upon cessation of NIR irradiation, PM efficiently achieves ROS elimination and inflammation alleviation through its superior superoxide dismutase-like and catalase-like activities. In vivo studies in a mouse Staphylococcus aureus -infected skin wound model further confirmed the superior therapeutic effects of PM, which effectively eliminated bacteria, relieved inflammation, promoted collagen deposition, and angiogenesis. This work provides an attractive therapeutic modality for equipping nanoheterojunctions with antibacterial and anti-inflammatory properties through programmed ROS regulation.
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Biosensors-Basel
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2024
·Vol. 14
·期 1
·38
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IF 4.9
Qiaolin Fan,Xiao Li,Hui Dong,Zhonghua Ni,Tao Hu
Graphene and graphene-like two-dimensional layered nanomaterials-based photoelectrochemical (PEC) biosensors have recently grown rapidly in popularity thanks to their advantages of high sensitivity and low background signal, which have attracted tremendous attention in ultrahigh sensitive small molecule detection. This work proposes a non-enzymatic and visible-light-sensitive PEC biosensing platform based on ZIF-67@MoS2/rGO composite which is synthesized through a facile and one-step microwave-assisted hydrothermal method. The combination of MoS2and rGO could construct van der Waals heterostructures, which not only act as visible-light-active nanomaterials, but facilitate charge carriers transfer between the photoelectrode and glassy carbon electrode (GCE). ZIF-67 anchored on MoS2/rGO heterostructures provides large specific surface areas and a high proportion of catalytic sites, which cooperate with MoS2nanosheets, realizing rapid and efficient enzyme-free electrocatalytic oxidation of glucose. The ZIF-67@MoS2/rGO-modified GCE can realize the rapid and sensitive detection of glucose at low detection voltage, which exhibits a high sensitivity of 12.62 μAmM−1cm−2. Finally, the ZIF-67@MoS2/rGO PEC biosensor is developed by integrating the ZIF-67@MoS2/rGO with a screen-printed electrode (SPE), which exhibits a high sensitivity of 3.479 μAmM−1cm−2and a low detection limit of 1.39 μM. The biosensor’s selectivity, stability, and repeatability are systematically investigated, and its practicability is evaluated by detecting clinical serum samples.Keywords:ZIF-67;2D material;non-enzymatic;heterostructure;visible-light sensitive;photoelectrochemical biosensing
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npj Flexible Electronics
·
2024
·Vol. 8
·期 1
·1-10
·
IF 12.3
Li Ruizi,Zhu Weiguo,Wang Haoyang,Jiao Yitong,Gao Yuan,Gao Ruikun,Wang Riheng,Chao Hongxiao,Yu Aimin,Liu Xiaowang
The thickness of the scintillation films in indirect X−ray detectors can significantly influence their luminescence intensity. However, due to the scattering and attenuation of incoherent photons, thick scintillation films tend to reduce light yield. Herein, a highly transparent perovskite glass−ceramic scintillation film, in which the CsPbBr 3 nanocrystals are in-situ grown inside a transparent amorphous polymer structure, is designed to achieve ultrastable and efficient X-ray imaging. The crystal coordination−topology growth and in−situ film formation strategy is proposed to control the crystal growth and film thickness, which can prevent light scattering and non−uniform distribution of CsPbBr 3 nanocrystals while providing sufficient film thickness to absorb X−ray, thus enabling a high−quality glass−ceramic scintillator without agglomeration and Ostwald ripening. This glass−ceramic scintillation film with a thickness of 250 μm achieves a low detection limit of 326 nGy air s −1 and a high spatial resolution of 13.9 lp mm −1 . More importantly, it displays remarkable scintillation stability under X−ray irradiation (radiation intensity can still reach 95% at 278 μGy air s −1 for 3600 s), water soaking (150 days), and high−temperature storage (150 days at 60 °C). Hence, this work presents a approach to construct ultrastable and flexible scintillation films for X−ray imaging with reduced light scattering and improved resolution.
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FOOD HYDROCOLLOIDS
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2025
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IF 12.4
Chang Liu,Ning Li,Linjie Luo,Xu Li,Zhiming Liu
A dual-layer pH-responsive fluorescent film was developed using hydroxypropyl methylcellulose (HPMC), zinc alginate (ZA), fluorescein isothiocyanate (FITC), and dragon fruit peel extract (DE) for real-time food freshness monitoring. The outer protective layer served as a hydrophobic barrier to reduce moisture interference, while the inner indicator layer acted as a pH-sensitive interface, integrating FITC's fluorescence and DE's visible color change for dual-mode sensing. The film exhibited good thermal stability, antimicrobial activity, and improved hydrophobicity. Optical responses were evaluated across a wide pH range (2.0–12.0), showing stable visible color under ambient light and enhanced fluorescence under 365 nm UV. Upon exposure to ammonia vapor, fluorescence intensity increased linearly from 0 to 1000 ppm (R 2 = 0.9895; LOD = 6.73 ppm), while visible color changes became evident at 500–5000 ppm, with R/B and R/G ratios exhibiting strong linearity (R 2 = 0.96176 and 0.96747; LODs = 1126 ppm and 958 ppm, respectively). Application trials with pork revealed distinct color changes after 4 days at 25 °C or 2 days at 5 °C. These results confirm the film's effectiveness for dual-mode, non-destructive, and real-time monitoring of pork freshness.
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Small
·
2024
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IF 13
Gerile Oudeng,Seema Banerjee,Qin Wang,Ding Jiang,Yadi Fan,Honglian Wu,Feng Pan,Mo Yang
Retinitis pigmentosa is the main cause of inherited human blindness and is associated with dysfunctional photoreceptors (PRs). Compared with traditional methods, optoelectronic stimulation can better preserve the structural integrity and genetic content of the retina. However, enhancing the spatiotemporal accuracy of stimulation is challenging. Quantum dot-doped ZnIn 2 S 4 microflowers (MF) are utilized to construct a biomimetic photoelectric interface with a 0D/3D heterostructure, aiming to restore the light response in PR-degenerative mice. The MF bio interface has dimensions similar to those of natural PRs and can be distributed within the curved spatial region of the retina, mimicking cellular dispersion. The soft 2D nano petals of the MF provide a large specific surface area for photoelectric activation and simulate the flexibility interfacing between cells. This bio interface can selectively restore the light responses of seven types of retina ganglion cells that encode brightness. The distribution of responsive cells forms a pattern similar to that of normal mice, which may reflect the generation of the initial “neural code” in the degenerative retina. Patch-clamp recordings indicate that the bio interface can induce spiking and postsynaptic currents at the single-neuron level. The results will shed light on the development of a potential bionic subretinal prosthetic toolkit for visual function restoration.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Youn-Jun Lee,Sung-Hyo Jung,Chang-Gu Lee
Low-molecular-weight organic pollutants present in feed water pose a significant challenge to maintaining ultrapure water (UPW) quality, as they are not readily removed by conventional treatment processes. Urea is a low-molecular-weight, nonionic, persistent organic pollutant resistant to conventional UPW production processes. Therefore, suitable oxidation technologies must be explored to convert urea to inorganic nitrogen ions, which are more easily removed in post-UPW treatment steps. In this study, the far-UVC (peak wavelength centered at 222 nm) coupled persulfate (PS) activation system was used for the effective oxidation of urea to nitrate (NO 3 − ). In the degradation of urea (10 μM, PS 0.4 mM, pH 7), far-UVC/PS systems (k urea,222/ PDS= 1.69 × 10 −3 cm 2 ∙mJ −1 , k urea,222/PMS = 2.69 ×10 −4 cm 2 ∙mJ −1 ) were found to be superior to conventional 254 nm LPUV/PS systems (k urea,254/PDS = 1.07 ×10 −4 cm 2 ∙mJ −1 , k urea,254/PMS = 7.01 ×10 −5 cm 2 ∙mJ −1 ). The far-UVC/PDS system showed the highest efficiency, achieving complete urea removal after 5241.0 mJ∙cm −2 of irradiation. The dominant role of SO 4 •− in urea degradation was systematically investigated, with urea removal showing a strong correlation with the steady-state concentration of SO 4 •− . Moreover, the evolution of inorganic nitrogen species and the reduction of total organic carbon were examined to assess the applicability of the system as a pretreatment technology in UPW production. The results provide valuable insights into the integration of the far-UVC process for the removal of low-molecular weight pollutants during UPW production.
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CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Xiu Li,Zhanheng Yan,Yanglin Shen,Wanjin Liu,Jun Ding
Oxides with the ABO 3 chemical formula play a crucial role in studying photostriction in inorganic materials. In this study, the photostrictive behavior of ilmenite-type ceramics ATiO 3 (where A = Mg, Fe, Co, Ni, and Mn) was investigated under visible light irradiation. Among the ceramics investigated, CoTiO 3 showed the highest photostriction of approximately 0.1 % under 405, 520, and 650 nm light irradiation. The photostrictive response decreased successively in FeTiO 3 , MnTiO 3 , NiTiO 3 , and MgTiO 3 . Temperature and thermal expansion tests revealed that the deformation of the ceramics caused by the photothermal effect accounted for approximately half of their photostriction. Raman and charge transfer analyses indicated that the photostriction of the ceramics depended significantly on their crystal structure. Thus, the ceramics exhibited distinct photostrictive performances. This study highlights the connection between the crystal structure and photostrictive performance of ilmenite-type ceramics, providing valuable insights into the underlying mechanism of photostriction in inorganic materials.
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Light-Science & Applications
·
2022
·Vol. 11
·期 1
·1-10
·
IF 20.257
Yu Peng,Cao Sheng,Shan Yuliang,Bi Yuhe,Hu Yaqi,Zeng Ruosheng,Zou Bingsuo,Wang Yunjun,Zhao Jialong
InP-based quantum dot light-emitting diodes (QLEDs), as less toxic than Cd-free and Pb-free optoelectronic devices, have become the most promising benign alternatives for the next generation lighting and display. However, the development of green-emitting InP-based QLEDs still remains a great challenge to the environmental preparation of InP quantum dots (QDs) and superior device performance. Herein, we reported the highly efficient green-emitting InP-based QLEDs regulated by the inner alloyed shell components. Based on the environmental phosphorus tris(dimethylamino)phosphine ((DMA) 3 P), we obtained highly efficient InP-based QDs with the narrowest full width at half maximum (~35 nm) and highest quantum yield (~97%) by inserting the gradient inner shell layer ZnSe x S 1−x without further post-treatment. More importantly, we concretely discussed the effect and physical mechanism of ZnSe x S 1– x layer on the performance of QDs and QLEDs through the characterization of structure, luminescence, femtosecond transient absorption, and ultraviolet photoelectron spectroscopy. We demonstrated that the insert inner alloyed shell ZnSe x S 1− x provided bifunctionality, which diminished the interface defects upon balancing the lattice mismatch and tailored the energy levels of InP-based QDs which could promote the balanced carrier injection. The resulting QLEDs applying the InP/ZnSe 0.7 S 0.3 /ZnS QDs as an emitter layer exhibited a maximum external quantum efficiency of 15.2% with the electroluminescence peak of 532 nm, which was almost the highest record of InP-based pure green-emitting QLEDs. These results demonstrated the applicability and processability of inner shell component engineering in the preparation of high-quality InP-based QLEDs.
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Nano Energy
·
2022
·
IF 19.069
Ting Xiang,Ting Li,Miaosheng Wang,Wei Zhang,Mahshid Ahmadi,Xiaoyan Wu,Tianfei Xu,Meiqin Xiao,Long Xu,Ping Chen
It is always difficult to control the growth of crystals during the formation of multiple quantum wells (MQWs) in the quasi-2D perovskite light emitting diodes (PeLEDs). In this study, we introduce the 1, 4, 7, 10-tetraoxacyclododecane ether into the quasi-2D perovskite of PEA 2 Cs n-1 Pb n Br 3n+1 to reduce the coordination rate between the phenethylamine bromide and the perovskite framework. As a result, Crown-ether assisted in-situ grown (CAIG) perovskite crystals (PCs) is grown with thick PbBr 4 layers (n > 55) during the spin-coating. For the CAIG PCs, the generation of small n phases (n = 1, 2 and 3) are significantly suppressed, resulting in almost flat energy structure with the phases of n ≥ 4. The generation rate of the excited states of the n ≥ 4 remains ultra-fast within ~0.77 ps even without the MQWs structures; however the decay of excited states becomes much slower. The CAIG PCs film has lower trap density , therefore promoting the carrier mobility , carrier diffusion length and the photoluminescence quantum yield . The PeLEDs based on the CAIG PCs film achieves the maximum luminescence of ~27562 cd m −2 and the maximum external quantum efficiency (EQE) of ~16.1%. The half-lifetime of the luminescence and the EQE measured in the atmosphere (a relative humidity of ~52% at 27 ℃) are exceeding ~17 and 43 h, respectively. Hence, it can be recognized as the most ambient stable device based on the PEA 2 Cs n-1 Pb n Br 3n+1 perovskite.
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