SUPRAMOLECULAR CHEMISTRY
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2011
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IF 1.94
Jing Cao,Hai
Yan Deng,Chen
Hui Wang,Yao Xiao,Ming Ren,You
Wei Zhang
A 3,4-dimethylthieno[2,3-b]thiophene-based fluorogenic probe bearing benzo[d]-thiazole-2-thio unit (sodium 3,4-bis ((benzo[d]thiazol-2-ylthio)methyl) thieno [2, 3-b]thio-phene-2, 5-dicarboxylate) was developed as a novel fluorescent chemosensor with high selectivity towards Pb(II) over other cations tested. The new probe exhibited good water solubility and only sensed Pb(II) among metal ions examined in neutral 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid buffer solution. The selectivity and sensitivity of fluorogenic probe to Pb(II) were discussed on the basis of experimental results.
研究领域:
分析化学
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环境科学
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传感器与探针
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无机化学
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ADVANCED MATERIALS
·
2023
·Vol. 35
·期 39
·2303674
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IF 29.4
Wenxiao Zhang,Haobo Yuan,Xiaodong Li,Xuemin Guo,Chunyan Lu,Acan Liu,Hui Yang,Lin Xu,Xueliang Shi,Zhiwei Fang,Haibo Yang,Ya Cheng,Junfeng Fang
Tin-lead (Sn-Pb) perovskite solar cells (PSCs) with near-ideal bandgap still lag behind the pure lead PSCs. Disordered heterojunctions caused by inhomogeneous Sn/Pb ratio in the binary perovskite film induce large recombination loss. Here, an Sn-Pb perovskite film is reported with homogeneous component and energy distribution by introducing hydrazine sulfate (HS) in Sn perovskite precursor. HS can form hydrogen bond network and coordinate with FASnI 3 thus no longer bond with Pb 2+ , which reduces the crystallization rate of tin perovskite to the level of lead analog. The strong bonding between SO 4 2− and Sn 2+ can also suppress its oxidation. As a result, the Sn-Pb PSCs with HS exhibit a significantly improved V OC of 0.91 V along with a high efficiency of 23.17%. Meanwhile, the hydrogen bond interaction network, strong bonding between Sn 2+ and sulfate ion also improve the thermal, storage, and air stability of resulting devices.
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Journal of Physical Chemistry C
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2021
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IF 4.126
Baoyuan Xu,Zhenhua Gao,Shuo Yang,Haoran Sun,Lixin Song,Yuanpeng Li,Weiguang Zhang,Xun Sun,Zifei Wang,Xue Wang,Xiangeng Meng
Perovskite quantum dots (PQDs) have attracted extensive attention for various applications due to their hallmark optoelectronic properties. However, PQD gain materials are usually needed to be integrated with an external cavity to acquire effective optical feedback for lasing oscillation, which generally suffers from stringent fabrication procedures and the destruction of their pristine gain performance. In this work, we propose an approach to realize a new class of random lasers that are constructed by in situ precipitating perovskite quantum dots (PQDs) in metal–organic frameworks (MOFs). Such random lasers make full use of the combined merits of MOFs showing a high refractive index and a broad transmission window and that of PQDs exhibiting high optical gain. A lead-based MOF is utilized as a matrix, which allows us to grow PQDs at the Pb2+ sites in situ and thus produce high-density PQDs gain in MOFs. We experimentally demonstrate low-threshold multicolor random lasers achieved in the visible spectral range with different wavelengths through compositional modulation in the nanoporous environment of MOF nanostructures and illustrate potential applications of the developed PQDs@MOFs random laser as the illumination source in the speckle-free optical imaging. This study will pave the way for the construction of perovskite-based lasing in multifunctional systems.
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Nanomaterials
·
2023
·Vol. 13
·期 22
·2911
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IF 5.3
Siyu Zhang,Bing Zhao,Xuejiao Zhang,Fengchang Wu,Qing Zhao
Due to activities like mining and smelting, lead (Pb) enters the atmosphere in various forms in coarse and fine particles. It enters plants mainly through leaves, and goes up the food chain. In this study, PbXn(nano-PbS, mic-PbO and PbCl2) was applied to eggplant (Solanum melongenaL.) leaves, and 379 differential metabolites were identified and analyzed in eggplant leaves using liquid chromatography–mass spectrometry. Multivariate statistical analysis revealed that all three Pb treatments significantly altered the metabolite profile. Compared with nano-PbS, mic-PbO and PbCl2induced more identical metabolite changes. However, the alterations in metabolites related to the TCA cycle and pyrimidine metabolism, such as succinic acid, citric acid and cytidine, were specific to PbCl2. The number of differential metabolites induced by mic-PbO and PbCl2was three times that of nano-PbS, even though the amount of nano-PbS absorbed by leaves was ten times that of PbO and seven times that of PbCl2. This suggests that the metabolic response of eggplant leaves to Pb is influenced by both concentration and form. This study enhances the current understanding of plants’ metabolic response to Pb, and demonstrates that the metabolomics map provides a more comprehensive view of a plant’s response to specific metals.Keywords:metabolite;absorption;metabolic pathway;amino acid;antioxidation
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MICROCHEMICAL JOURNAL
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2023
·
IF 4.8
Yuan Zhang,Lelin Qian,Zhangli Yu,Ying Yu,Chang Feng,Lili Niu,Juan Zhang
A simple, inexpensive, fast, and visual distance-based paper analytical device has been developed for on-site detection of Pb(II). Pb(II) can inhibit the catalytic activity of G-quadruplex/hemin (G4/hemin) DNAzyme induced by K + , which catalyzes 3,3,5,5-tetramethyl benzidine (TMB) immobilized on paper to produce a visible blue band. The factors affecting Pb(II) detection have been optimized with PS concentration of 3 μM, K + concentration of 10 mM, and hemin concentration of 10 μM, as well as the straight channel width of 2.0 mm. It can be well found that the formed length correlates with the concentration of Pb(II) with a linear detection range of 0.02 μM − 50 μM. A fitting linear equation of Y = 20.793–5.391Log C (R 2 = 0.9788) can be obtained with a lowest detection limit of 1 nM. Additionally, the method is capable of selectively detecting Pb(II) and works well for Pb(II) detection in real samples. Overall, the visual distance-based paper analytical device offers an ideal platform for on-site detection of heavy metal ions, especially in resource-limited areas.
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Small
·
2021
·Vol. 17
·期 8
·2006111
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IF 13.281
Mengxuan Yu,Xiaohu Yang,Yejun Zhang,Hongchao Yang,Haoying Huang,Zan Wang,Jinyi Dong,Rong Zhang,Ziqiang Sun,Chunyan Li,Qiangbin Wang
Ag 2 Se quantum dots (QDs) as an effective biological probe in the second near-infrared window (NIR-II, 1000–1700 nm) have been widely applied in bioimaging with high tissue penetration depth and high spatiotemporal resolution. However, the ions deficiency and crystal defects caused by the high Ag + mobility in Ag 2 Se crystals are mainly responsible for the inefficient photoluminescence (PL) of Ag 2 Se QDs. Herein, a tailored route is reported to achieve controllable doping of Ag 2 Se QDs in which Ag is exchanged by Pb via cation exchange (CE), which is unattainable by direct synthetic methods. The Pb-doped Ag 2 Se QDs (denoted as Pb:Ag 2 Se QDs) present fire-new optical features with significantly enhanced PL intensity of 4.2 folds. Photoelectron spectroscopy confirms that Pb acts as an n-type dopant for Ag 2 Se QDs and therefore the electronic impurities provide additional carriers to fill the traps. Moreover, the general validity of this method is demonstrated to convert different sized Ag 2 Se into Pb:Ag 2 Se QDs, so that a wide range of NIR-II PL with high intensity is obtained. The bright NIR-II emission of Pb:Ag 2 Se QDs is further successfully performed in lymphatic system mapping.
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Journal of Physical Chemistry C
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2021
·
IF 4.126
Xiaomei Chen,Mu He,Sheng Huang,Lei Zhang,Haizheng Zhong
Here, we fabricated Cs-rich and Pb-rich Cs4PbBr6 samples with green photoluminescence emission and investigated the difference between them. Both Cs-rich and Pb-rich Cs4PbBr6 samples show strong green emissions at about 520 nm; however, the photoluminescence excitation properties of the green emission are greatly different from each other in the ultraviolet region. The photoluminescence excitation spectra of the Cs-rich sample have a broad excitation band from 334 to 500 nm. In comparison, the Pb-rich sample has two additional excitation bands of 250–300 and 324–334 nm. By correlating the experimental data with the theoretical calculations, the green photoluminescence emission can be attributed to the embedded CsPbBr3 nanocrystals, and the interlayer between Cs4PbBr6 and CsPbBr3 nanocrystals plays an important role in determining their photoluminescence excitation properties. It was proposed that the existence of the CsBr interlayer between the Cs4PbBr6 matrix and embedded CsPbBr3 nanocrystals block the electron transfer of excited Cs4PbBr6 and induce photoluminesence quenching under excitation of 250–300 nm.
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CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Chenliu Tang,Lan Ling,Wei-xian Zhang
Enhanced stability and prolonged reactivity of nanoparticles are critical factors for successful applications of the nanoscale zero-valent iron (nZVI) technology. In this work, g-C 3 N 4 was employed as a support for distributing, stabilizing nZVI and further changing the composition, microstructure and electronic structure of nZVI due to the interactions between the iron nanoparticles and g-C 3 N 4 sheet. Adjusting the micro-structure of nZVI to enhance the adsorption ability, control the electron transfer, shift IEP negatively, and improve the reactivities and stabilities coordinatively results in stabilized and long-term effective g-nZVI. For example, the accumulated wastewater (i.e., [Pb(II)] = 10 mg/L) treatment volume with g-nZVI in 5 runs is determined to be 50 L, more than twice the treatment capacity of bare nZVI. Besides, more Pb(II) is reduced to metallic Pb by g-nZVI than that by nZVI. Characterizations with spherical-aberration-corrected scanning transmission electron microscopy (Cs-STEM) integrated with X-ray energy dispersive spectroscopy (XEDS), electron energy loss spectroscopy (EELS), Raman spectroscopy, etc. visualize and quantitatively analyze the structural differences and distinctive reactive behaviors of nZVI and g-nZVI. The N-containing functional groups efficiently capture aqueous metal cations, accelerate mass transfer and electron transport from the iron core to surface-attached metal ions. In addition, the nZVI micro-structure change and the formation of covalent bonds between the lone-pair electron of nitrogen and empty orbital of iron apparently reduced the iron corrosion. Results provide direct evidence on the interface chemistry of g-nZVI and further verify the graphitic carbon nitride induces the Pb(II) ions to be deposited, reduced and grown onto iron nanoparticles.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 32
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IF 1.768
Zhengyan Tan,Hong Peng,Hongfang Liu,Linling Wang,Jing Chen,Xiaohua Lu
A novel magnetic adsorbent (EDTA /chitosan/ PMMS) was facilely prepared by reacting chitosan with EDTA anhydride in presence of PEI - coated magnetic microspheres. The as-synthesized EDTA/ chitosan /PMMS was characterized by XRD, SEM, TGA, FT-IR , and VSM, and then employed in removal of heavy metals of Pb(II) from aqueous solution. The results of the batch adsorption experiments revealed that the adsorbents had extremely high uptake capacities for Pb(II) in the pH range of 2 to 5.5, and the adsorption kinetics for EDTA/ chitosan /PMMS was consistent with the pseudo – second - order kinetic model. Moreover, its equilibrium data were fitted with the Langmuir isothermal model well, which indicated that the adsorption mechanism was a homogeneous monolayer chemisorptions process. The maximum adsorption capacity of EDTA/ chitosan /PMMS for Pb(II) was found to be 210 mg g − 1 at pH 4 (30 ° C), and further reuse experiments results suggested that EDTA /chitosan/ PMMS could be a potential recyclable magnetic adsorbent in the practical wastewater treatment. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42384.
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DALTON TRANSACTIONS
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2016
·Vol. 45
·期 16
·7124-7130
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IF 4.177
Li-Jun Zhang,Yan-Yan Li,Peng-Fei Liu,Ling Chen
New borophosphates Li3Cs2M2B3P6O24 (M = Pb, Sr) have been synthesized by high-temperature solid-state reactions. The single-crystal X-ray diffraction data reveal their non-centrosymmetric cubic space group P213 and lattice parameters of a = 12.7246(3) Å and 12.687(2) Å and V = 2060.31(8) Å3 and 2042.3(4) Å3 for Li3Cs2Pb2B3P6O24 and Li3Cs2Sr2B3P6O24, respectively. They are three-dimensional (3D) [BP2O8]3−∞ anionic frameworks formed by a new double six-membered ring building unit consisting of BO4 and PO4 units joined alternately. Interestingly, such a double six-membered ring is regarded as the structural variation of the 12-membered ring in the known KSrBP2O8, fusing at the BO4 tetrahedron induced by the coexistence of the Li+ and Cs+ cations with their large size difference. The title compounds show weak SHG intensity and exhibit photoluminescence emissions at 410 nm for Li3Cs2Pb2B3P6O24 and 440 nm for Li3Cs2Sr2B3P6O24.
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Nanoscale
·
2016
·Vol. 8
·期 13
·7172-7179
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IF 7.76
Dezhi Chen,Weisong Shen,Shaolin Wu,Caiqin Chen,Xubiao Luo,Lin Guo
Nanoporous adsorbents of ZnO/ZnFe2O4/C were synthesized by using a metal organic framework (FeIII-modified MOF-5) as both the precursor and the self-sacrificing template. The adsorption properties of ZnO/ZnFe2O4/C toward Pb(II) ions were investigated, including the pH effect, adsorption equilibrium and adsorption kinetics. The adsorption isotherms and kinetics were well described by using the Langmuir isotherm model and pseudo-second-order model, respectively. The MOF-derived inorganic adsorbents exhibited high absorption performance with a maximum adsorption capacity of 344.83 mg g−1. X-ray powder diffraction and high-resolution X-ray photoelectron spectroscopy suggest that Zn(II) was substituted by a significant portion of Pb(II) on the surface of ZnO nanocrystals. Microscopic observations also demonstrate the effect of Pb(II) ions on ZnO crystals as reflected by the considerably reduced average particle size and defective outer layer. Quantitative measurement of the released Zn(II) ions and the adsorbed Pb(II) ions indicated a nearly linear relationship (R2 = 0.977). Moreover, Pb-containing ZnO/ZnFe2O4/C adsorbents are strongly magnetic allowing their separation from the water environment by an external magnet.
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ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Yun Yan Su,Zhaogang Teng,Hui Yao,Shou Ju Wang,Ying Tian,Yun Lei Zhang,Wen Fei Liu,Wei Tian,Li Juan Zheng,Nan Lu,Qian Qian Ni,Xiao Dan Su,Yu Xia Tang,Jing Sun,Ying Liu,Jiang Wu,Gui Fen Yang,Guang Ming Lu,Long Jiang Zhang
In this work, we design mesoporous silica-coated Prussian blue nanocubes with PEGyltation to construct multifunctional PB@mSiO2–PEG nanocubes. The PB@mSiO2–PEG nanocubes have good biocompatibility, excellent photothermal transformation capacity, in vivo magnetic resonance and photoacoustic imaging ability. After loading antitumor drug doxorubicin (DOX) in the PB@mSiO2–PEG nanocubes, the constructured PB@mSiO2–PEG/DOX nanoplatforms show an excellent pH-responsive drug release character within 48 h, namely, an ultralow cumulative drug release amount of 3.1% at pH 7.4 and a high release amount of 46.6% at pH 5.0. Upon near-infrared laser irradiation, the PB@mSiO2–PEG/DOX nanoplatforms show an enhanced synergistic photothermal and chemical therapeutic efficacy for breast cancer than solo photothermal therapy or chemotherapy.
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