ACS Applied Materials & Interfaces
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2020
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IF 8.758
Pengyun Liu,Xiaoqing Yang,Yonghui Chen,Huimin Xiang,Wei Wang,Ran Ran,Wei Zhou,Zongping Shao
Although organic–inorganic halide perovskite solar cells (PSCs) have shown dramatically enhanced power conversion efficiencies (PCEs) in the last decade, their long-term stability is still a critical challenge for commercialization. To address this issue, tremendous research efforts have been devoted to exploring all-inorganic PSCs because of their intrinsically high structural stability. Among them, CsPbIBr2-based all-inorganic PSCs have drawn increasing attention owing to their suitable band gap and favorable stability. However, the PCEs of CsPbIBr2-based PSCs are still far from those of their organic–inorganic counterparts, thus inhibiting their practical applications. Herein, we demonstrate that by simply doping an appropriate amount of Cu2+ into a CsPbIBr2 perovskite lattice (0.5 at. % to Pb2+), the perovskite crystallinity and grain size are increased, the perovskite film morphology is improved, the energy level alignment is optimized, and the trap density and charge recombination are reduced. As a consequence, a decent PCE improvement from 7.81 to 10.4% is achieved along with an enhancement ratio of 33% with a CsPbIBr2-based PSC. Furthermore, the long-term stability of CsPbIBr2-based PSCs against moisture and heat also remarkably improved by Cu2+ doping. This work provides a facile and effective route to improve the PCE and long-term stability of CsPbIBr2-based all-inorganic PSCs.
研究领域:
光伏技术
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材料科学
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无机化学
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可再生能源
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
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IF 4.4
You Mei,Zhou Zixuan,Yan Xinying,Xie Haotian,Chen Xueke,Zhang Jing,Liao Fusheng,Wei Guobing,Fan Hao,Yin Zhaojiang
In this study, we developed a fluorescent sensor based on a pyrene-derived covalent organic framework (PT 2 D-COFs) for the efficient and sensitive detection of copper ions (Cu 2+ ) and iron ions (Fe 3+ ). The PT 2 D-COFs are synthesized via a Schiff base reaction, exhibiting high crystallinity, excellent porosity, and remarkable chemical stability, which provide ideal coordination sites for the effective recognition of metal ions. The results demonstrate that the PT 2 D-COFs exhibit significant fluorescence quenching upon interaction with Cu 2 ⁺, with a detection limit (LOD) of 0.79 nM, while fluorescence enhancement is observed in the presence of Fe 3+ , with an LOD of 0.47 nM. and reproducibility in complex sample matrices. It was effectively utilized to quantify Cu 2+ and Fe 3+ in environmental water samples and traditional Chinese herbal medicines, achieving satisfactory recovery rates. This sensor demonstrates characterized by its low detection limits, strong anti-interference capability, and broad application potential, holds significant promise for applications in environmental monitoring and bioanalysis. Graphical abstract
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
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IF 4.3
Lin Yuan,Shuhua Han
A novel type of small-sized nanosheets (TD-Si) was prepared by chemical exfoliating stacked bulk materials of benzimidazole-based covalent organic polymer (TpDAB). Then TD-Si was used as organosiloxane precursor to incorporate into silica frameworks of mesoporous organosilica nanoparticles (TD-MONs) using CTAB as structural-directing agents. The obtained TD-MONs show a clearly hexagonal mesoporous structure with high surface area. Moreover, the optical properties of TD-MONs were measured with fluorescence and Ultraviolet–visible (UV–vis) spectroscopies. The results showed that TD-MONs possessed excitation wavelength dependent fluorescence and had better fluorescence properties due to the reduction of π-π stacking between nano-layers of TpDAB polymer. The emission peaks of TD-MONs were red-shifted as the excitation wavelength increases and TD-MONs exhibited the optimal fluorescence emission at 525 nm when excited at 400 nm. TD-MONs showed high selectivity, sensitivity and recyclability toward copper ions and could be used for the detection of Cu 2+ with a low limit of detection (LOD) as low as 3.77 × 10 −7 M. In addition, the coordination interaction between TD-MONs and copper ions was demonstrated by FT-IR spectra and high-resolution X-ray photoelectron spectra, and further proved that the binding sites were carbonyl oxygen atoms and imidazole nitrogen atoms in TD-MONs. Therefore, TD-MONs is expected to be a high-sensitive chemical sensor for detecting Cu 2+ .
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JOURNAL OF LUMINESCENCE
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2022
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IF 4.171
Jing Ying Yang,Wen Ying Gao,Jian Hua Wang,Zhen Ming Dong,Yu Wang,Shao Min Shuang
Herein we present a new colorimetric and fluorescent probe , AH, derived from the Schiff base condensation between 4-(2-aminophenylimino)-7-nitrobenzofurazan and 2-hydroxy-1-naphthaldehyde for optical sensing of Cu 2+ ions. In aqueous CH 3 CN solution (CH 3 CN/H 2 O, 1:1, v/v , pH7.4), AH effectively complexed with Cu 2+ at a stoichiometric ratio of 1:1, producing nearly 25-fold fluorescence enhancement at 540 nm along with a significant color change from orange to grey blue. The sensing system exhibits high specificity for the detection of Cu 2+ . The detection limit is as low as 42.2 nM. The observed switching on fluorescence emission can be attributed to the suppression of photo-induced electron transfer (PET) as well as chelation enhanced fluorescence (CHEF) effect after coordination of AH with Cu 2+ ion via the unshared electron pair on the phenyl amine. A test strip with AH has been fabricated for identifying Cu 2+ . Fluorescence imaging study reveals that probe AH is capable to sense Cu 2+ in living HeLa cells, Malpighian tubules of locust and zebrafish.
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Foods
·
2023
·Vol. 12
·期 13
·2487
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IF 5.2
Ziqiang Li,Shuang Liang,Li Zhou,Fengjian Luo,Zhengyun Lou,Zongmao Chen,Xinzhong Zhang,Mei Yang
Glyphosate has excellent herbicidal activity, and its extensive use may induce residue in the environment and enter into humans living through the food chain, causing negative impact. Here, water-soluble 1.55 nm size nitrogen-doped carbon quantum dots (NCDs) with strong blue fluorescence were synthesized using sodium citrate and adenine. The maximum excitation and emission wavelengths of NCDs were 380 nm and 440 nm, respectively. The above synthesized NCDs were first used for the construction of a fluorescence sensor for glyphosate detection. It was found that Cu2+could quench the fluorescence of NCDs effectively through the photoinduced electron transfer (PET) process, which was confirmed using fluorescence lifetime measurements. Additionally, the fluorescence was restored with the addition of glyphosate. Hence, a sensitive turn-on fluorescence sensor based on NCDs/Cu2+for glyphosate analysis was developed. The LODs of glyphosate for water and rice samples were recorded as 0.021 μg/mL and 0.049 μg/mL, respectively. The sensor was applied successfully for ultrasensitive and selective detection of glyphosate in environmental water and rice samples with satisfied recoveries from 82.1% to 113.0% using a simple sample pretreatment technique. The proposed strategy can provide a significant potential for monitoring glyphosate residue in water and agricultural product samples.Keywords:carbon quantum dots;fluorescence;glyphosate detection;water;rice
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PubMed
高影响因子
ACS Omega
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2022
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IF 4.132
Zhi Li,Shuhua Han
A novel type of organic–inorganic hybrid periodic mesoporous materials based on 1,8-dihydroxyanthraquinone (DHAQ-PMOs) was synthesized in a ternary deep eutectic solvent (DES). In the process of the material synthesis, an organosiloxane precursor (DHAQ-Si) and tetraethylorthosilicate (TEOS) were used as the mixed Si source, and cetyltrimethylammonium bromide (CTAB) was used as the structure directing agent. The DES formed by choline chloride (ChCl), urea (U), and ethylene glycol (EG) was used as a green solvent. The water needed for the hydrolysis of DHAQ-Si and TEOS was provided from free water in the sodium hydroxide solution. As characterized by small-angle X-ray scattering, nitrogen adsorption/desorption isotherms, and high-resolution transmission electron microscopy, the obtained mesoporous materials exhibit a two-dimensional hexagonal (P6mm) structure. DHAQ possesses double fluorescence emission peaks at ca. 520 and 580 nm due to the effect of the excited-state intramolecular proton transfer (ESIPT). For DHAQ-PMOs, the silica framework can provide a rigid environment that makes the fluorescence properties more stable and the fluorescence emission peak appears to red-shift obviously. The DHAQ-PMOs have high selectivity and sensitivity in a wide pH range that can be used to detect Cu2+, and the limit of detection (LOD) is as low as 2.39 × 10–9 M. Fluorescence polarization experiments, high-resolution mass spectrometry, and Fourier transform infrared spectroscopy were used to study the coordination interaction between DHAQ and Cu2+. The density functional theory (DFT) was used to further prove the coordination ability and interaction between DHAQ and Cu2+. XPS spectra were also done to prove the coordination of DHAQ and DHAQ-PMO-10 with Cu2+. In addition, confocal fluorescence microscope images exhibit that DHAQ-PMOs can detect Cu2+ in living cells. The results show that DHAQ-PMOs have great application potential as a sensor for the detection of Cu2+.
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PubMed
高影响因子
Particuology
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2022
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IF 3.251
Bei Li,Jing Li,Yi Fu,Xiwen Ye,Maodi Xie,Lei Feng,Xiaoya Niu,Zhen You
Laser mediated photothermal/chemodynamic co-therapy is widely applied for anti-cancer treatment due to its good therapeutic effect. However, the laser wavelength for effectively targeting deep tumor tissues can decide whether or not it is a key premise of irradiation treatment. In this study, a super-homogenous and highly dispersive spherical nanoparticle Cu 2-X Se was prepared, which displayed a strong surface plasmon resonance (SPR) peak in the near-infrared region (NIR)-II and high Fenton catalytic efficiency. The results of in vitro experiments showed that Cu 2-X Se nanoparticles exhibited high photothermal conversion efficiency under the excitation of NIR-II laser irradiation, which significantly improved its ability to produce ·OH. In a tumor-bearing mouse model, the combination of Cu 2-X Se and photothermal/chemodynamic co-therapy guided by the real-time photoacoustic imaging in the NIR-II could effectively inhibit tumor growth and exhibit good in vivo/in vitro biocompatibility. In summary, this Cu 2-X Se nanoparticle-based NIR-II laser-mediated photothermal/chemodynamic co-therapy strategy is expected to provide a new option for the diagnosis and treatment of liver cancer.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Jiajia Lian,Pei Liu,Qingyun Liu
Realizing the high value-added utilization of cheap minerals in environmental catalysis has important practical significance. Herein, four nano-scale minerals, namely halloysite (Hal) nanotubes , palygorskite (Pal) nanorods , and montmorillonite (Mon) and hydrotalcite (LDH) nanosheets , were selected for in-situ supporting CeO 2 nanoparticles (NPs) by a facile one-pot hydrothermal method. Among various nanocomposites (NCs), CeO 2 /Pal behaves the highest peroxidase-like activity, attributing to larger surface area for uniformly dispersing CeO 2 NPs and more exposed active oxygen vacancy (O vac ) defects. A novel off-on colorimetric strategy was constructed for detecting toxic L -penicillamine (LPA) and Cu 2+ ion with limit of detections (LODs) of 8.37 and 9.80 μM, respectively. Density functional theory (DFT) calculations show that the O vac defect on CeO 2 (111) surface can catalyze the heterolytic cleavage of H 2 O 2 into H 2 O and oxygen radical (•O), instead of being two hydroxyl radicals (•OH) on clean surface. It can also act as trapping site for O 2 and H 2 O adsorption, improving the oxygen affinity and hydrophilicity of CeO 2 /Pal. This study provides a feasible strategy for designing mineral-based nanozymes and an insight into the possible catalytic mechanism.
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PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
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2022
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IF 5.723
Hao Wang,Hongyou Yin,Zeng Zhang,Yan Wu,Chang Yi,Tingting Shen
γ-Cu 2 (OH) 3 Cl is used as a Fenton catalyst to mineralize phenol in high chloride solutions. The mineralization of phenol can be enhanced even at 15000 mg∙L –1 NaCl under ambient pH. In addition, other aromatic contaminants including bisphenol A , benzoic acid , 2-chlorophenol, salicylic acid and aniline can also be effectively mineralized under the high chloride concentration. However, reference catalysts including CuSO 4 , CuO and Cu 2 O are significantly depressed by chloride. The chloride resistance ability of γ-Cu 2 (OH) 3 Cl is proposed. First, σ-Cu-ligand complexes formed between Cu 2+ and phenolic hydroxyl can react with H 2 O 2 to promote the rapid reduction of Cu 2+ to Cu + , which are not hindered by chloride. Second, the self-redox property of γ-Cu 2 (OH) 3 Cl which initiates the electron transfer from H 2 O 2 to Cu 2+ to generate Cu + is improved by chloride. Third, the circumneutral pH could suppress HO• scavenging by chloride. The activation energies of phenol mineralization over γ-Cu 2 (OH) 3 Cl in chloride-free and high chloride solutions are 42.9 and 32.3 kJ∙mol –1 , respectively. Chloride does not change the phenol mineralization pathway but accelerates its degradation into small carboxylic acids.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Junkai Zeng,Xiangwu Geng,Yifan Tang,Zhi-Chao Xiong,Ying-Jie Zhu,Xiongsheng Chen
Cutaneous wounds accompanied by bacterial infections and impaired angiogenesis might be lethal and remain a challenging issue in clinical fields, causing an urgent need for the multifunctional wound dressings with effective disinfection and wound tissue regenerative abilities. Herein, we report a flexible photothermal biopaper (named BP/HAP:Cu 2+ ) with the integration of two-dimensional photothermal-capable black phosphorus nanosheets (BPNSs) and one-dimensional antibacterial Cu 2+ -doped ultralong hydroxyapaptite (HAP:Cu 2+ ) nanowires for accelerated healing of the infected wound. The as-prepared BP/HAP:Cu 2+ biopaper exhibits the stable porous networked structure, high porosity, good biocompatibility, superior photothermal conversion ability and antibacterial function. The photothermal effect generated by BPNSs conjugated with the sustained release of Cu 2+ ions can damage the bacterial membrane and enhance glutathione oxidation, achieving a synergistic high antibacterial efficiency on Staphylococcus aureus of 97.0%. Moreover, the BP/HAP:Cu 2+ biopaper can effectively promote in vitro angiogenesis of human umbilical vein endothelial cells. Results of animal experiments further reveal that the BP/HAP:Cu 2+ biopaper as the wound dressing under near infrared laser irradiation significantly enhances the wound healing by simultaneously eliminating bacteria and accelerating angiogenesis. Taken together, the BP/HAP:Cu 2+ photothermal biopaper has a promising therapeutic potential for rapid healing of infected wounds.
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FOOD CHEMISTRY
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2022
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IF 9.231
Yisheng Lin,Yuanjin Zhan,Fang Luo,Cuiying Lin,Jian Wang,Bin Qiu,Zhenyu Lin
Hydrogen sulfide (H 2 S) has emerged as an important indicator in the spoilage process of meat. In this study, a mimetic enzyme based on Cu 2+ -modified boron nitride nanosheets-supported gold nanoparticles (AuNPs/Cu 2+ -BNNS) was synthesized, which can be used to catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). The H 2 S gas can inhibit the activity of AuNPs/Cu 2+ -BNNS toward catalytic oxidation of TMB. Meanwhile, the usage of headspace method could avoid most interferences in the rotten sample. Various concentrations of TMB + could change the aspect ratio of the gold nanoroads (AuNRs), which results in vivid color changing and UV–vis spectra shifting. The sensor had a good linear relationship with H 2 S concentration ranging from 10.0 to 90.0 μmol/L, and the detection limit is 7.8 μmol/L. The AuNPs/Cu 2+ -BNNS sensors were successfully applied to detect H 2 S produced by meat spoilage with satisfying results.
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PubMed
高影响因子
Crystals
·
2023
·Vol. 13
·期 5
·812
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IF 2.7
Yuanyuan Xiong,Mengxiao Chen,Zhen Mao,Yiqing Deng,Jing He,Huaixuan Mu,Peini Li,Wangcai Zou,Qiang Zhao
Carbon dots have drawn extensive attention in the detection of metal ions with good stability, excellent biocompatibility and low toxicity. Meanwhile, the quantum yield, response rate and the detection mechanism for Cu2+ions are vital to their development and application. To obtain more selective and sensitive materials to detect Cu2+ions, N-doped carbon dots (DN-CDs) were synthesized by a one-step hydrothermal method using citric acid as the carbon source and diethylenetriamine (DETA) as the nitrogen source. The obtained DN-CDs exhibited stable and intense blue light emission and special near-infrared up-conversion fluorescence at 820 nm, attributed to the effect of introducing N atoms into the structure of carbon dots. Due to the dynamic quenching of the DN-CDs by Cu2+ions, the fluorescence intensity (λex = 820 nm) of DN-CDs was quantitatively decreased in the presence of Cu2+ions. The DN-CDs had a rapid response within 3 min. The DN-CD system exhibited a linear relationship with a concentration range from 2.5 to 50 µM and low detection limit (LOD) of 42 nM. After careful investigation, an interesting conclusion was proposed: N-doped CDs with N/O = 1:1 or higher with relatively abundant N atoms prefer to detect Cu2+ions while those with N/O = 1:2 or lower prefer to detect Fe3+ions.Keywords:carbon dots;up-conversion fluorescence;Cu2+ions detection
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