Nanomaterials
·
2019
·Vol. 9
·期 7
·957
·
IF 4.034
Pengchao Li,Baohua Zhu,Peng Li,Zhihao Zhang,Luyao Li,Yuzong Gu
CdSe-reduced graphene oxide (CdSe/RGO) composites were synthesized by a hydrothermal method. CdSe/RGO composites with different mass ratios were prepared. The structure and morphology of CdSe/RGO composites were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The synthesis of CdSe/RGO complexes was successfully demonstrated by Fourier infrared (FT-IR) and Raman spectra. CdSe nanoparticles in the CdSe/RGO composite were uniformly dispersed on the graphene surface. The study found that oxygen-containing functional groups such as hydroxyl (-OH) and carboxyl (-COOH) groups in graphene played a decisive role in the dispersion of CdSe. The third-order nonlinear optical properties of CdSe/RGO composites were measured by a single beam Z-scan technique. The experimental results showed that composites exhibited two-photon absorption and self-focusing nonlinear refraction properties. Additionally, the third-order nonlinear susceptibility of the composite material was obviously enhanced, which was mainly due to the good dispersion of CdSe nanoparticles on graphene.Keywords:CdSe/RGO nanocomposites;carboxyl groups;third-order nonlinear optical property;Z-scan technique;good dispersion
研究领域:
材料科学
·
光学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Weijie Lei,Hao Wang,Xiaojing Zhang,Zhimao Yang,Chuncai Kong
As competitive photocatalysts , Cu 2 O nanoparticles meet with severe photogenerated carries recombination and insufficient light absorption, leading to the poor photocatalytic performance. Herein, the truncated Cu 2 O-Au (CA) binary and Cu 2 O-Au-TiO 2 (CAT) ternary octahedra with Au nanoparticles (Au NPs), preferentially supported on the (110) and (100) planes of Cu 2 O, are synthesized for efficient photocatalytic degradation reactions. The photodegradation rates of MO of CA1 (Cu 2 O-Au containing 1 wt % Au) and CAT are as high as 95.61% and 96.5% under 60 min of visible light irradiation, respectively. On the one hand, the synergistic function of localized surface plasmon resonance (LSPR) of Au NPs and Schottky barrier accelerate the separation and transfer of photogenerated carriers. On the other hand, a Z-scheme electron transfer system is constructed in CAT to promote the photodegradation performance. According to the finite-difference-time-domain (FDTD) simulation result, there is a strong electric field enhancement at the contact sites between Au, Cu 2 O and TiO 2 , which accelerates the electron transfer to a large extent and separates the electron-hole pairs. Therefore, this work may provide an approach for the synthesis and applications of multiple heterostructure catalyst.
研究领域:
材料科学
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环境科学
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DOI
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JOURNAL OF PHYSICS D-APPLIED PHYSICS
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2022
·Vol. 55
·期 42
·424005
·
IF 3.409
Chang Wang,Ran Duan,Xingcheng Xiao,Yingwei Wang,Zhihui Chen,Yejun Li,Si Xiao,Jun He
Long hexagonal Co3(PO4)2·4H2O nanosheets were synthesized using a hydrothermal method, where their nonlinearity was probed via a femtosecond Z-scan system. The results show that the Co3(PO4)2·4H2O nanosheets exhibit saturable absorption when the incident photon energy is greater than the forbidden band width, while optical limiting is found when the incident photon energy is smaller than the forbidden band width. In particular, the obtained Co3(PO4)2·4H2O nanosheets demonstrate the best optical limiting properties at 600 nm. The present study suggests the cobalt phosphates nanosheets as a promising candidate for optical limiters.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Liang Geng,Wenjun Li,Mei Dong,Xiaohui Ma,Ajmal khan,Yanyan Li,Mengchao Li
The separation of photogenerated carriers and the efficient utilization of high-level energy electrons (HLEEs) are the key processes for improving the performance of photocatalysts. Herein, Ce 2 Ti 2 O 7 /ZnIn 2 S 4 (CTOZIS) and Bi 3+ -doped Ce 2 Ti 2 O 7 /ZnIn 2 S 4 (BCTOZIS) photocatalyst were successfully synthesized through hydrothermal method . The photocatalytic hydrogen production of CTOZIS and BCTOZIS was 1233.7 μmol g −1 and 4168.5 μmol g −1 under visible light irradiation (λ ≥ 420 nm) within 5 h, which was 2.3 and 7.6 times than that of pure ZnIn 2 S 4 , respectively. X-ray photoelectron spectroscopy, photoluminescence spectroscopy and electrochemical characterization demonstrated that after Bi 3+ doping, the electron-hole pairs recombination of BCTOZIS was inhibited, which may be ascribed to the establishment of a Z-scheme heterojunction and the presence of oxygen vacancy and Ce 4+ /Ce 3+ redox center. The doping of Bi 3+ resulted in the adjustment of the valence band position of Ce 2 Ti 2 O 7 from 1.98 V to 1.92 V. This adjustment enabled direct transfer of HLEEs generated in Ce 2 Ti 2 O 7 to the conduction band of ZnIn 2 S 4 for hydrogen production with a wavelength below 423 nm. The synergistic effect of conventional Z-scheme electron transfer and the unique utilization of HLEEs boosted the photocatalytic performance of BCTOZIS. This study affords an innovative insight for designing visible-light-driven photocatalysts with high photocatalytic activity .
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
MICROBIAL PATHOGENESIS
·
2024
·
IF 3.3
Zhikun Zhang,Dawei Shi,Haiwei Dou,Ruijie Wan,Qing Yuan,Peng Tu,Deli Xin
In previous study, lower levels of serum GP130 were reported in children with MPP. GP130 is an important signal transducer, the down regulation of which may influence host immune responses. In this study, we aimed to analyze the regulatory mechanism of GP130 during MP infection. Firstly, the mRNA and protein levels of GP130 both decrease and then increase with increasing multiplicity of infection (MOI: 1 to 40) of MP. The lowest levels of GP130 were detected at MOI of 5. Then, heat treated MP but not trypsin treated MP or MP extracted proteins show regulatory effect to the expression of GP130. These indicate that the down regulation of GP130 is related to protein mediate adhesion process of MP. Gene expression analysis revealed that MP affected apoptosis and the TLR4 pathway in infected cells, and the mRNA level of IL-6 was correlated with that of GP130. Further, Z-VAD-FMK (pan-caspase inhibitor) can suppress the apoptosis induced by MP infection and restore GP130 at protein level. Further studies revealed that MP infection promoted TLR4 internalization but did not activate the NF-κB pathway. The levels of surface TLR4 showed correlation with the transcription of IL-6 and GP130. TAK242 (TLR4 inhibitor) and PS341 (proteasome inhibitor) can restore the decreased transcription of GP130, both of which were able to promote NF-κB pathway activation in MP-infected cells. These suggested that the regulation of TLR4/NF-κB pathway and induced apoptosis post MP infection are involved in the down-regulation of GP130 at transcription and protein levels, respectively.
研究领域:
微生物学
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免疫学
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细胞生物学
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分子生物学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Xiong Zhao,Jianwu Wei,Jing Li,Xianli Li,Anxiang Guan,Peican Chen,Liya Zhou,Jie Tian,Jiahong Pan,Binbin Luo,Qi Pang
Advanced photocatalytic architectures for sustainable CO 2 reduction encounter two significant challenges involving severe electron-hole recombination and limited active sites. Herein, we synthesize a Z-scheme heterojunction composing of Mn-doped CsPbBr 3 nanoplatelets (Mn-CPB) and zinc phthalocyanine (ZnPc) via self-assembly. Mn 2 + doping in CsPbBr 3 induces spin polarization, creating spin-polarized hot electrons. These electrons transfer via the Z-scheme interface to ZnPc’s Zn 2+ center, thereby enhancing photocarrier separation and mobility and promoting CO 2 adsorption-activation. The heterostructure achieves an exceptional CO evolution rate of 15.17 μmol g −1 h −1 with 78.31 % selectivity, surpassing the performance of individual components under visible light. In-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations confirm the formation of key intermediates (•CO 2- ) during CO 2 adsorption and reduction. This work presents a strategy integrating spin regulation with interfacial band alignment, advancing perovskite-derived photocatalysts for solar-to-chemical conversion.
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产品关联
DOI
高影响因子
Inorganic and Nano-Metal Chemistry
·
2025
·
IF 1.6
Su Xu,HuaYing Li,Chao Wang,TsingHai Wang
Efficient charge transfer is crucial for photocatalytic pollutant removal, essential for sustainable water treatment. Herein, a Mn3O4@BiOBr heterojunction was synthesized via a simple hydrothermal method, combining the multivalent redox properties of Mn3O4 with the visible-light responsiveness of BiOBr. Under irradiation, the removal efficiency of norfloxacin (NOR) increased from approximately 80% with pristine BiOBr to around 90% with Mn3O4@BiOBr, attributed to the enhanced suppression of electron–hole recombination. Radical scavenging tests revealed that photogenerated holes (h+) and superoxide radicals (O2•−) were the primary reactive species driving the degradation process. The kinetics of NOR degradation were significantly influenced by competitive adsorption of co-existing anions and the complexation with divalent cations. Despite high stability, the reusability of the composite was limited by the accumulation of NOR and intermediates on active sites, highlighting the need to accelerate product desorption. This study provides mechanistic insights and practical guidance for designing visible-light-driven photocatalysts for efficient antibiotic removal.
研究领域:
环境科学
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材料化学
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光催化
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水处理
·
污染物降解
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2026
·
IF 4.3
Ranran Zhang,Pengfei Zhu,Xuemei Chen,Yunhui Jiang
Antibiotic contamination in aquatic environments has become an increasingly serious issue, creating an urgent need for efficient and environmentally friendly remediation technologies. Herein, a Bi 0 -BiVO 4 /PPy composite photocatalyst was prepared through a combined hydrothermal, in situ reduction, and oxidative polymerization strategy for visible-light-driven tetracycline (TC) removal. Under optimized reaction conditions, Bi 0 -BiVO 4 /PPy-3 achieved 85.4% TC removal within 60 min and exhibited a significantly improved reaction rate compared with pristine BiVO 4 . The composite also showed good recyclability after regeneration, satisfactory salt tolerance, and stable activity in different water matrices. Moreover, a preliminary wheat-growth assay suggested that the treated solution had lower phytotoxicity than the original TC solution. The enhanced photocatalytic activity is associated with the synergistic effects of Bi 0 introduction and PPy coupling, including improved visible-light absorption and more efficient interfacial charge separation. THz Time-Domain Spectroscopy (THz-TDS) further revealed enhanced terahertz absorption and a modulated refractive response in Bi 0 -BiVO 4 /PPy-3, providing additional evidence for strengthened interfacial coupling and charge transport. Radical trapping experiments and EPR analysis indicate that h + and •O 2 − are the dominant reactive species in the TC degradation process. Based on the available experimental and DFT calculations, a possible Z-scheme like charge transfer pathway and several tentative degradation routes of TC were proposed. Overall, this work suggests that Bi 0 -BiVO 4 /PPy is a promising visible-light-responsive photocatalyst for antibiotic removal from water.
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Yujie Ma,Baowei Shen,Yaping Sun,Lingyu Zhang,Yu Xia,Xing Wang,Yong Liu,Jian Zhao,Yuhua Feng
In nanosynthesis, precise structural tailoring is crucial for modulating the properties of hybrid materials. For photocatalysts, structural configuration of the composed materials is a key factor for improving their efficiency. In this study, the CdS-CeO 2 hybrids in core-satellite and core-shell structures were successfully synthesized via accurate kinetic control in a seed-mediated growth process. Due to the Z -scheme charge transfer mechanism, excellent photocatalytic activity was observed in photocatalytic degradation of methylene blue (MB) and CO 2 reduction reactions (CO 2 RR). Notably, the Janus-type core-satellite structure exhibited significantly higher photocatalytic activity than the core-shell structure. Mechanistic analysis revealed that the spatial separation of the CdS and CeO 2 domains in core-satellite structure led to continuous fast separation and transfer of the photogenerated holes and electrons (h + and e − ) to different exposed domains, whereby can be depleted immediately, resembling the electron sink effect. While in core-shell structure, the transfer of the excited carriers to different domain would inevitably cause charge accumulation at the inner core, which obstruct the further charge separation and transfer. Our study provides an effective general way for promoting the charge separation efficiency in hybrid photocatalyst, which is helpful for the rational design and synthesis of advanced photocatalyst.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122569
·
IF 7.5
Li Li,Mengru Wang,Wenjing Zhang,Xueli zhang,Han Li,Runqiang Liu,Chao Liu,Xingyun Hu
The removal of antibiotics from water remains a challenge, where adsorption as a pre-concentration step is crucial for subsequent photocatalytic degradation. Herein, we propose a synergistic strategy by constructing a heterojunction between the strong adsorbent MnO 2 and the photocatalyst BiOBr. A series of MnO 2 /BiOBr composites were synthesized via an in-situ redox method under an ice bath. The optimal 1% MnO 2 /BiOBr composite exhibited remarkably enhanced simultaneous adsorption and photocatalytic degradation efficiency towards ciprofloxacin (CIP), norfloxacin (NOR), and tetracycline (TC) under simulated sunlight, significantly outperforming pristine BiOBr and MnO 2 . Comprehensive characterizations confirmed the successful formation of an intimate heterojunction. Mechanistic studies, including active trapping species and electron spin resonance (ESR) analysis, revealed that the superoxide radical (•O 2 - ) and hydroxyl radical (•OH) were the dominant reactive species. The band structure alignment and charge transfer analysis supported a direct Z-scheme mechanism, which effectively promotes the separation of photogenerated carriers while preserving high redox potentials. Furthermore, the effects of operational parameters (catalyst dosage, initial concentration, pH), inorganic anions, and natural organic matter (NOM) on CIP removal were systematically investigated, demonstrating good practicality. The degradation pathways of CIP were elucidated via LC-MS analysis, and toxicity assessment using T.E.S.T. software indicated a general reduction in the ecotoxicity of the intermediates. This work highlights MnO 2 as a multifunctional modifier and provides a feasible approach for designing efficient adsorbent-photocatalyst hybrids for antibiotic wastewater remediation.
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Tingyang Li,Qian Liu,Zheng Xiong,Peng Ji,Ruiyang Zhao,Jishu Han,Lei Wang
Hydrogen, a source of clean energy, has great potential for applications in the field of renewable energy. Developing low-cost, high-efficiency composite photocatalysts with high performance and good stability characteristics has broad application prospects. In this study, the Ni0.7Co0.3P/MnCo2S4 composite photocatalysts were prepared by the in situ deposition of Ni0.7Co0.3P nanoparticles on the surface of the MnCo2S4 yolk–shell nanoflowers derived from MnCo-layered double hydroxide. The hydrogen production performance of the photocatalysts was modified by regulating the Co-dopant amount in Ni1−xCoxP and the loading amount of Ni0.7Co0.3P. The measurements illustrated that the hydrogen generation rate of Ni0.7Co0.3P/MnCo2S4 under visible light irradiation was markedly increased and the composite photocatalyst maintained good stability. The modification of Ni0.7Co0.3P helped to enhance its light absorption capacity, thus providing more active sites. Meanwhile, the Z-scheme heterojunction formed between MnCo2S4 and Ni0.7Co0.3P could expedite the shift of photogenerated carriers, limit the recombination of photogenerated electrons and holes and contribute to H2 production. This work affords a novel approach for the development of high-performance composite photocatalysts.
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产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Linke Zhao,Yang Li,Lili Li,Gongke Wang,Hairui Liu,Hongjing Li,Arif Nawaz,Haifa Zhai
A Z-scheme CIS/rGO/p-CN heterostructure was designed. • CIS/rGO/p-CN exhibits the highest visible-light activity for Cr(VI) photoreduction. • rGO serves as the solid-state electron mediator to switch the charge transfer mode. Hexavalent chromium (Cr (VI)), a highly toxic metal ion readily soluble in aqueous environments, poses significant threats to human health. Herein, a novel Z-scheme CuInS 2 /rGO/protonated g-C 3 N 4 heterostructure was designed with rGO serving as the solid-state electron mediator between CuInS 2 and protonated C 3 N 4 . The samples were systematically characterized using XRD, FTIR, SEM, TEM, XPS, PL, and UV–vis spectroscopy techniques. This flower-like hierarchical structure CuInS 2 /rGO/protonated g-C 3 N 4 exhibits enhanced visible-light photocatalytic activity for Cr (VI) photoreduction. Specifically, it demonstrates a 98% reductive efficiency for Cr (VI) within 20 min at pH= 4 and stable photocatalytic performance. The results indicate that the integration of rGO nanosheets significantly enhances the photocatalytic performance of the CuInS 2 /rGO/protonated g-C 3 N 4 heterostructure by weakening the built-in electric field between CuInS 2 and protonated C 3 N 4 and switching the charge transfer mode from a conventional p-n junction to a Z-scheme mechanism. Download: Download high-res image (103KB) Download: Download full-size image
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