PEST MANAGEMENT SCIENCE
·
2025
·
IF 3.8
Wenhua Rao,Shang Gao,Minyu Li,Chao Shen,Tao Lin,Dingyang Zhang,Xiaohong Pan,Binghai Lou,Guocheng Fan,Jinfeng Hu
BACKGROUND Citrus canker, a bacterial disease caused by Xanthomonas citri subsp. citri (Xcc), is one of the major threats to the citrus industry. Inorganic copper (Cu) formulations such as Bordeaux mixture and Kocide 3000 are currently used to control citrus canker; however, they are poorly water-soluble and have negligible plant transport, making the systemic treatment of citrus canker difficult. RESULTS This study synthesized Cu 2 O@His by one-pot self-assembly of Cu 2+ and histidine for controlling citrus canker. The results showed that Cu 2 O@His had a uniform size distribution (≈2.7 nm) and good water solubility. It could disrupt the cell membrane of Xcc and enter into the bacterial cells to destroy the DNA, thereby inhibiting the growth (half maximal inhibitory concentration = 7.4 μg mL −1 ) and production of virulence factors of Xcc. This was attributed to its excellent dispersibility and reactive oxygen species-inducing ability. The therapeutic efficacy and plant transport of Cu 2 O@His were much better than those of Kocide 3000. Additionally, it had remarkable biosafety for citrus plants and earthworms (lethal concentration 50% >> 40 mg kg −1 ). CONCLUSION This study provides a new, eco-friendly and more efficient option for citrus canker control. © 2025 Society of Chemical Industry.
研究领域:
植物病理学
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农业科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 2
·212
·
IF 4.4
Zhuang Tong,Yunliang Liu,Xin Wu,Yuanyuan Cheng,Jingwen Yu,Xinyue Zhang,Naiyun Liu,Xiang Liu,Haitao Li
The luminescence properties and excellent carrier transfer ability of carbon quantum dots (CQDs) have attracted much attention in the field of photocatalysis. In this work, we loaded the CQDs on the surface of Cu2O to enhance the visible-light property of Cu2O. Furthermore, the composite was used for selective oxidation of benzyl alcohol to benzaldehyde. The composite catalyst achieved high selectivity (90%) for benzaldehyde at room temperature, leveraging its visible-light-induced electron transfer properties and its photocatalytic activity for hydrogen peroxide decomposition. ·OH was shown to be the main reactive oxygen species in the selective oxidation reaction of benzyl alcohol. The formation of heterostructures of CQDs/Cu2O promoted charge carrier separation and provided a fast channel for photoinduced electron transfer. This novel material exhibited enhanced levels of activity and stability for selective oxidation of benzyl alcohol. Potential applications of carbon quantum dot composites in conventional alcohol oxidation reactions are shown.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 44
·期 35
·15645-15652
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IF 4.197
Hanxing Chen,Teng Tu,Ming Wen,Qingsheng Wu
New Cu2O-on-Cu nanowires (NWs) are constructed to develop the visible-light-driven activity of photocatalysts via the facile self-assembly of Cu2O nanoparticles (NPs) on a Cu NW surface assisted by a structure director, followed in situ reduction. In the resultant Cu2O-on-Cu NWs, the Cu2O NPs, with a diameter of 10 nm, show good distribution on the 50 nm-sized Cu single-crystal NWs. Owing to the band-gap adjusting effect and high electron transportation, the coupling of narrow-band-gap semiconductor Cu2O and excellent conductor Cu can lead to the markedly enhanced high visible light photocatalytic activity of Cu2O-on-Cu NWs toward the degradation of dye pollutants including Rhodamine B (RhB), methyl orange (MO) and methyl blue (MB). The as-designed Cu2O-on-Cu heterostructured NWs exhibit higher performance for the catalytic degradation of dye compounds than pure Cu2O. Nearly 60%, 100%, and 85% conversion with reaction rate constants (k) of 0.0137, 0.0746 and 0.0599 min−1 can be achieved for the degradation of RhB, MO and MB, respectively. Besides the highly efficient transportation of electrons, Cu NWs have a strong capacity for oxygen activation, which results in the gathering of negative charges and rich chemisorbed oxygen onto the surface. This may be responsible for the high catalytic efficiency of the Cu2O-on-Cu NWs toward the degradation of organic pollutants.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Cijun Shuai,Gao Pan,Zheng Wang,Tiantian He,Xiong Shuai,Qi Zhong,Shuping Peng
MoS 2 has shown potential in enhancing biological scaffolds with sonodynamic therapy. However, its efficacy in generating reactive oxygen species (ROS) is constrained by electron-hole recombination, which results in insufficient ROS levels to penetrate bacterial biofilms. To address this limitation, we adopted a dual-strategy approach by utilizing MoS 2 @Cu 2 O nanozymes with Type-II heterojunctions and enzyme-like activity, thereby enabling dual-mode antibacterial effects via the integration of sonodynamic therapy (SDT) and chemodynamic therapy (CDT). Specifically, we integrated MoS 2 @Cu 2 O nanozymes into poly-L-lactic acid scaffolds via selective laser sintering. Under ultrasound excitation, the electron-hole separation in MoS 2 @Cu 2 O heterojunctions generated 1 O 2 and ● OH outside the bacteria. Both simulation and experiments revealed the carriers’ separation mechanism and transfer path. Meanwhile, the Cu ions released by the scaffolds generated ● OH and consumed glutathione through the Cu + /Cu 2+ cycle, disrupting the redox balance inside the bacteria. A reactive oxygen species storm was formed through the dual attack on the interior and exterior of bacteria, inducing bacterial apoptosis. The obtained inhibition rates of S.aureus and E.coli were 97 % and 96 %, respectively. These results indicate that the MoS 2 @Cu 2 O/PLLA scaffold is promising for dual-mode SDT/CDT efficient antibacterial treatment.
研究领域:
生物材料学
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医学工程
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微生物学
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 14
·8332-8339
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IF 3.119
Pinhua Zhang,Hongyang Zhu,Kaifeng Xue,Li Chen,Changmin Shi,Dongchao Wang,Jianfu Li,Xiaoli Wang,Guangliang Cui
2D heterostructures are promising gas sensor materials due to their surface/interface effects and hybrid properties. In this research, Cu2O/Fe2O3 heterostructure ordered arrays were synthesized using an in situ electrodeposition method for H2S detection at low temperatures. These arrays possess a periodic long range ordered structure with horizontal multi-heterointerfaces, leading to superior gas sensitivity for synergistic effects at the heterointerfaces. The sensor based on the Cu2O/Fe2O3 heterostructure ordered arrays exhibits a dramatic improvement in H2S detection at low temperatures (even as low as −15 °C). The response is particularly significant at room and human body temperatures since the conductivity of the arrays can change by up to three orders of magnitude in a 10 ppm H2S atmosphere. These good performances are also attributed to the formation of metallic Cu2S conducting channels. Our results imply that the Cu2O/Fe2O3 heterostructure ordered arrays are promising candidates for high-performance H2S gas sensors that function at low temperatures as well as breath analysis systems for disease diagnosis.
研究领域:
材料科学
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传感器技术
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气体检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO
·
2018
·
IF 1.1
Xu Chen,Chunxin Yu,Xiaojiao Guo,Qinsong Bi,Muhammad Sajjad,Yang Ren,Xiaowei Zhou,Zhu Liu
Novelty Cu 2 O multi-branched nanowires and nanoparticles with size ranging from ∼ 15 nm to ∼ 60 nm have been synthesized by one-step hydrothermal process. These Cu 2 O nanostructures when used as anode materials for lithium-ion batteries exhibit the excellent electrochemical cycling stability and reduced polarization during the repeated charge/discharge process. The specific capacity of the Cu 2 O nanoparticles, multi-branched nanowires and microscale are maintained at 201.2 mAh/g, 259.6 mAh/g and 127.4 mAh/g, respectively, under the current density of 0.1 A/g after 50 cycles. The enhanced electrochemical performance of the Cu 2 O nanostructures compared with microscale counterpart can be attributed to the larger contact area between active Cu 2 O nanostructures/electrolyte interface, shorter diffusion length of Li + within nanostructures and the improved stress release upon lithiation/delithiation.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2023
·
IF 2.8
Sun Wenwen,Guo Ruyue,Shi Chaojie,Li Xuechen,Wu Jiayi,Tian He,Li Huayi,He Jie,Yang Zhengchun,Li Jiahui,Sun Shanfeng
In this study, we prepared carbon quantum dots (CQDs)-modified 26-facet Cu/Cu 2 O composites and investigated their photocatalytic degradation effect on methyl orange (MO). The microstructure and composition of the reduction products were analyzed. The test results validate the successful modification of CQDs on the surface of Cu/Cu 2 O composites. Further, through electrochemical performance analysis among the materials with different thiourea dioxide (TD) contents, 3TD (n × 0.00075 mol of thiourea dioxide is defined as nTD) exhibits the strongest electron transfer ability; thus, 3TD was selected to further combine with CQDs to examine the photocatalytic performance of Cu/Cu 2 O composites. We analyzed the photocatalytic behavior of the composites by monitoring the degradation of the MO solution. Based on the photocatalytic performance test, the CQDs/3TD composite exhibits excellent photocatalytic activity. Following 120 min of visible light irradiation, the degradation rate of MO with the addition of loaded CQDs increased from 25 to 73%. Materials with both adsorption and photocatalytic properties were successfully prepared, which resolved the regeneration of adsorbents to a certain extent and further accelerated the degradation of dyes. Graphical Abstract
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Zhiwei Jian,Jiangwei Yu,Ian Jimmy Madatta,Yang Liu,Jinrui Ding
The electrochemical reduction of carbon dioxide (CO 2 ) to high-energy multi-carbon compounds is a significant challenge. Efforts have been made to design efficient catalysts for high selectivity toward multi-carbon products. In this study, granular protruded irregular Cuprous oxide (Cu 2 O) nanoparticles were synthesized using a simple water bath wet chemical reduction method. Polyethylene glycol (PEG) was utilized as a directing agent to control the morphology of Cu 2 O in the process. The optimized irregular Cu 2 O (ir-Cu 2 O) catalyst exhibits a remarkable faraday efficiency of 69.3% (±3.3%) for double-carbon compounds (C 2 ), which is significantly higher than that of polyhedral Cu 2 O (p-Cu 2 O) (50.4%±1.1%) synthesized without adding PEG . Cu 2 O nanoparticles with irregular shape featuring randomly distributed spherical protrusions offer more active sites for CO 2 adsorption than p-Cu 2 O catalysts, which is beneficial for the conversion of CO 2 to C 2 . In addition, in situ infrared spectra reveal that ir-Cu 2 O reduces CO 2 to C 2 mainly through the coupling of the CO* and CHO*, thereby promoting the formation of C 2 . These findings provide valuable insights for the design of high-efficiency electrocatalysts for CO 2 electroreduction to C 2 .
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Haixin Tan,Bin Chen,Meihuan Liu,Jiamiao Jiang,Juanfeng Ou,Lu Liu,Fei Wang,Yicheng Ye,Junbin Gao,Jia Sun,Fei Peng,Yingfeng Tu
Light-driven micro/nanomotors have made enormous progress in various practical applications owing to their excellent controllability and programmability. However, it is still far from real intellectualization. Herein we demonstrate the successful fabrication of hollow cuprous oxide (Cu 2 O) micromotors with autonomous phototaxis reversal behavior by in-situ sensing the local pH change of surrounding environment without altering the lighting direction. The fabricated motors exhibit excellent and controllable propulsion under low-strength visible light illumination (1100 LUX) due to faster charge separation between different facets of the crosslinked polyhedral Cu 2 O microstructures. Intriguingly, our Cu 2 O micromotors are possible to respond smartly to the local pH gradient and reverse from negative to positive phototaxis, therefore the motors are capable of evacuating automatically after mission. We envision that such adaptive micromotor with great intellectualization via responding autonomously to the local stimuli shows great promise in various applications especially biomedical scenarios.
研究领域:
纳米技术
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生物医学工程
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材料科学
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机器人技术
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·
IF 1.5
Zhou Lu-Wei,Chen Kai-Wei,Dai Xiao-Jun,Qiao Tai-Fei,Liu Hong-Yu,Lu Ji-Gen,Wang Peng,Gong Chun-Hui,Deng Shao-Gang,Xia Ming,Ni Fei,Tang Guo-Min,Zhang Yong-Bing,Yang Yi
Cu/Cu 2 O-modified activated carbon composites (Cu/Cu 2 O@AC) were synthesized via an one-step solvothermal method. The characterization results indicated that copper was uniformly dispersed on the surface of AC as nano-sized Cu 0 and Cu(I), which allowed Cu/Cu 2 O to make full contact with I − . The high specific surface area of Cu/Cu 2 O@AC and the affinity of Cu + for I − led to the equilibrium adsorption capacity within forty minutes. Additionally, the removal of trace I − (300 μg L −1 ) at pH = 3 by Cu/Cu 2 O@AC reached 96.4%. This work provides a promising application for the inexpensive and efficient capture of trace iodine from medical wastewater. Graphical abstract We synthesized Cu/Cu 2 O@AC composites for adsorption of iodide ions in solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2014
·Vol. 38
·期 10
·4656-4660
·
IF 3.159
Linli Tang,Jian Lv,Shaodong Sun,Xiaozhe Zhang,Chuncai Kong,Xiaoping Song,Zhimao Yang
An interesting morphology-evolution of Cu2O from cubic, edge-truncated cubic, edge- and corner-truncated octahedral, truncated octahedral, and finally to octahedral architectures was readily achieved by adjusting the concentration of hydroxyl. When evaluated for their photocatalytic performances, these polyhedral Cu2O crystals manifest shape-dependent properties.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 38
·14194-14201
·
IF 8.067
Lilai Sun,Lu Han,Na Li,Pengbo Wang,Mingyue Wang,Xudong Luo,Xibao Li
Cu2O has begun to show its charm and gain popularity in various photoelectrochemical (PEC) processes, but fast charge recombination and photochemical instability always limit its PEC water splitting activity and stability. Furthermore, H2O wetting on the Cu2O photocathode is the premise for PEC reaction, while research on carrier separation, photostability and still wettability has not been brought to the forefront. Herein, a self-polymerized dopamine coating is employed to directly anchor TiO2 (P25) on the surface of a Cu2O film electrode; nanoscale particles facilitate polydopamine (PDA) conformal assembly on Cu2O polyhedra. A ternary Cu2O/PDA/TiO2 composite photocathode is obtained and shows boosted PEC activity and stability. The advantages of this unique design are mainly reflected in three aspects: (1) the married heterojunction of TiO2/Cu2O provides a persistent driving force for charge separation by PDA natural adhesive properties; (2) the conversion of hydrophobicity–hydrophilicity is achieved to improve the wettability of the Cu2O film electrode assisted by conformal PDA coating; (3) the improvement of PEC stability is due to the inhibition of Cu2O photocorrosion covered by the PDA shelter. This advance bodes well for the development of the PEC field founded on multifunctional PDA.
研究领域:
材料科学
·
能源科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）