Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 5
·950-958
·
IF 7.779
Shifei Kang,Zhihao Zhang,Maofen He,Zirou Fang,Di Sun,Lulu Zheng,Xijiang Chang,Lifeng Cui
Co-modification of graphitic carbon nitride (g-C3N4) photocatalysts can maximally optimize their intrinsic photoelectric structures, but usually involves complex multistep reactions, and thus is challenging because structural collapse and active site decay usually happen due to the complex process, over-treatment or conflict of different modification strategies. In this work, potassium iodate (KIO3), an edible salt additive, was used as a critical waste-free modifier in the thermal polymerization of g-C3N4, leading to a fast and coordinated co-modification of g-C3N4 photocatalysts. The final g-CN-KIO3 photocatalyst demonstrated a superior and balanced optical absorption ability and semiconductor band structure. In visible-light-driven photocatalytic model tests, g-CN-KIO3 showed a 3.25 times higher Cr(VI) photoreduction rate and five orders of magnitude lower residual bacteria in a photocatalytic sterilization within 120 min compared with raw g-C3N4. The photocatalytic performance of g-CN-KIO3 also outperformed all of the controls without maximized K–I–O co-modification (CN-K, CN-I, CN-O, and CN-KI). Photocurrent and electrochemical impedance experiments suggest that the co-modified photocatalysts have a faster charge separation ability, which is attributed to the multiple K–I–O co-modifications inducing an optimized surface electronic structure and slower carrier recombination. This work provides a new way to simplify and coordinate complex multi-factor regulation of materials.
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JOURNAL OF COORDINATION CHEMISTRY
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2023
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IF 1.9
Ming-Ming Wang,Xiaofei Kuang,Ting-Ting Li,Hui Yang,Ying-Hao Mi,Ying-Chao Xu,Can-Zhong Lu
Luminescent Cu(I) complexes have drawn considerable attention as alternative materials to precious transition metal complexes due to their low cost and electron configuration. Discrete heteroleptic diamine-diphosphine copper(I) complexes have been investigated owing to their outstanding photophysical features. However, heteroleptic copper(I) coordination polymers remain mostly unexplored. Herein, we report the synthesis and photophysical characterization of a heteroleptic copper(I) coordination polymer by employing bidentate oxybis(2,1-phenylene)bis(diphenylphosphine) (POP) diphosphine and nitrogen heterocyclic 5-[4-(1-imidazolyl)phenyl]-2H-tetrazole (ipt) as ligands. By utilizing the mixed-solvent strategy, a one-dimensional (1D) linear chain was constructed under solvothermal reaction conditions. Temperature-dependent emission spectra combined with decay time measurements demonstrate that emission originated from triplet phosphorescence at ambient temperature.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Shaoming Yang,Yaqi Wang,Wenling Zha,Leyan Xiong,Minyang Dai,Yongxin Liu,Ji Zhao,Xi Chen,Liangpeng Zeng,Haijiao Xie
Coordination CIS-EDTA-CdS S-scheme heterojunction for PEC cathodic protection. • EDTA: bifunctional layer, passivating defects and modulating band positions. • S-scheme charge transfer enhances carrier separation and suppresses recombination. The development of photoanodes combining broad-spectrum light response with efficient charge separation is crucial for photoelectrochemical cathodic protection. In this work, an atomic-scale S-scheme heterojunction was constructed between narrow-bandgap CuInS₂ (CIS) and CdS via coordination-bond interface engineering. Specifically, EDTA was first employed as a small-molecule bridging agent to passivate dangling bonds and surface defects on CIS through coordination interactions. Subsequently, CdS was grown in situ onto the CIS-EDTA surface, yielding the CIS-EDTA-CdS composite photoanode. Results demonstrate that EDTA modification not only suppresses non-radiative recombination but also directionally tailors the band structure of CIS, transforming the heterojunction from a Type-I to an S-scheme configuration. The optimized composite photoanode achieves a photocurrent density of 1.3 mA·cm⁻² under light and shifts the corrosion potential of the coupled 304 stainless steel to −1.15 V (vs. NHE). Mechanistic investigations reveal that the S-scheme charge-transfer pathway promotes the recombination of conduction-band electrons from CdS with valence-band holes from CIS-EDTA, while preserving the high-energy electrons on the CIS-EDTA side for effective cathodic protection. This study provides a new paradigm for the application of atomic-scale interface engineering in photoelectrochemical anticorrosion, highlighting the potential of coordination-bridge strategies in designing high-performance photoanodes. Coordination-bonding engineered CuInS₂-EDTA-CdS heterojunction for boosted photocathodic protection Download: Download high-res image (337KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shulin Qin,Lichun Ma,Runfeng Li,Pengfei Yuan,Yunfeng Shi,Xin Ji,Wei Xue,Yanli Li,Wen Liu
Although immune checkpoint blockade (ICB) therapy has been widely used for the treatment of a variety of cancers, its therapeutic efficacy is severely impaired by low tumor immunogenicity and the immunosuppressive microenvironment. Herein, we designed multifunctional immunomodulatory calcium nanoparticles to reshape the immunosuppressive tumor microenvironment. Our multifunctional calcium nanoparticles, CD@CaCO 3 P, are designed to release calcium ions and doxorubicin (DOX) into the acidic tumor microenvironment, which synergistically increase the tumor cell calcium ion concentration, while the release of combretastatin A4 phosphate (CA4P) further enhances T cell infiltration. Specifically, CD@CaCO 3 P effectively mediates the immunogenic cell death (ICD) of tumor cells and triggers the activation of nuclear factor kappa-B (NF-κB)/interferon regulatory factor 3 (IRF3), thereby regulating type I interferon (IFN-I) signaling pathways, and ultimately reprogramming the immunosuppressive tumor microenvironment by inducing M1-like macrophage polarization, promoting dendritic cell maturation, and increasing the infiltration of CD8 + T cells. Furthermore, CD@CaCO 3 P significantly increased tumor susceptibility to α-PD-1 checkpoint blocking immunotherapy and enhanced systemic immunotherapy performance against both primary and metastatic tumors. Our work provides new insights for the use functional calcium nanoparticles that modulate the tumor microenvironment to enhance the efficacy of cancer immunotherapy.
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Nanotechnology Reviews
·
2023
·Vol. 12
·期 1
·
IF 7.4
Wen-Juan Zhang,Ye-Zhi Ding,Ya-Xian Wang,You-Liang Wang,Yu-Long Fei,Meng-Yu Ran
The pollution of silver ion (Ag( i )) has become a serious environmental threat and hazard to ecosystem and human health. Thus, the nanoscale zero valent iron (nZVI)-doped polypyrrole-based carbon nanotube (nZVI/CNT) composites were synthesized by a facile method to remove Ag( i ) from wastewater due to the toxicity and scarcity nature of Ag( i ). In this process, Fe 3+ initiated the self-assembly of polypyrrole tubes in the presence of methyl orange, while it also served as an iron source generated nZVI/CNTs by carbothermal reduction method. The nZVI/CNT composites exhibited a homogeneous tubular structure, and the nZVI formed were uniformly dispersed in the nZVI/CNT composites. The nZVI/CNT composites were used as an adsorbent for the removal of Ag( i ) and showed a higher adsorption capacity compared to nZVI and CNTs, with a maximum adsorption capacity of 522.41 mg g −1 . Ag( i ) was adsorbed on nZVI/CNT composites by ion exchange and chelation, where Ag( i ) was reduced to non-toxic Ag due to the redox reaction among pyrrolic-N, nZVI, and Ag( i ). The adsorption process of Ag( i ) on nZVI/CNT composites was dominated by monolayer adsorption. According to our results, nZVI/CNT composites can be used as economical treatment for wastewater containing Ag( i ).
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FOOD CHEMISTRY
·
2021
·
IF 7.514
Huihuang Xiong,Yong Fan,Xuejin Mao,Lan Guo,Aiping Yan,Xian Guo,Yiqun Wan,Hao Wan
Recently, the natural compound of aristolochic acid I (AAI) has attracted wide attentions due to its strong nephrotoxicity and carcinogenicity. However, the extraction of AAI based on conventional molecularly imprinted polymers (MIPs) are tedious with extensive eluent, causing secondary pollution and poor regeneration. Herein, thermosensitive and magnetic MIPs (TMMIPs) were synthesized by a surface imprinting method, which achieved thermosensitive capture/release of AAI, along with rapid magnetic separation, significantly shortening the elution time and reducing organic-solvent consumption. TMMIPs with dual-stimuli responses exhibited superior affinity, selectivity, kinetics, and regeneration ability towards AAI. TMMIPs were applied to analyze AAI in Houttuynia cordata via dispersive solid-phase extraction (d-SPE) coupled with high performance liquid chromatography (HPLC), yielding satisfactory recoveries (79.03–99.67%) and relative standard deviations (≤5.78%). The limit of detection of AAI was as low as 26.67 µg/L. TMMIPs demonstrate great applicability for fast, selective and eco-friendly extraction of AAI in complicated matrices.
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JOURNAL OF LUMINESCENCE
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2021
·
IF 3.599
Zhenxing Fang,Kuang Wu,Le Wang,Da Xu,Weiwei Wang,Yuhang Lin,Xiaohui Liu,Chun Sun
Mn doped two-dimensional (2D) layered perovskites , are becoming excellent candidates as red phosphor because of their high quantum yields (QY) and enhanced stability. However, these Mn doped 2D layered perovskites can only be excited by the near UV light , which largely limits the development of perovskites. Herein, blue-excitable Mn-doped PEA 2 (Pb/Mn)(Br/I) 4 PQDs are synthesized from anion exchange surface engineering strategy. After anion exchange, orange Mn 2+ emission from exciton-to-Mn energy transfer is acquired under the excitation of 450 nm. The PEA 2 (Pb/Mn)(Br/I) 4 compounds exhibit strong luminescence with photoluminescence (PL) QY of 52%, which is comparable to most of the reported red emitting phosphors. A prototype white light-emitting diode (WLED) with good optical performance was fabricated using commercial (Sr,Ba) 2 SiO 4 :Eu phosphor and as-prepared PEA 2 (Pb/Mn)(Br/I) 4 as green and orange color converters, showing great potential in the applications of solid state lighting.
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Materials
·
2020
·Vol. 13
·期 18
·4026
·
IF 3.057
Shasha Zhang,Wenxin Ji,Ning Feng,Liping Lan,Yuanyuan Li,Yulong Ma
In this study, a Rh(I)/Ru(III) catalyst with a bimetallic space structure was designed and synthesized. The interaction between the metals of the bimetallic catalyst and the structure of the bridged dimer can effectively reduce the steric hindrance effect and help speed up the reaction rate while ensuring the stability of the catalyst. X-ray photoelectron spectroscopy (XPS) results show that rhodium accepts electrons from chlorine, thereby increasing the electron-rich nature of rhodium and improving the catalytic activity. This promotes the nucleophilic reaction of the catalyst with methyl iodide and reduces the reaction energy barrier. The methanol carbonylation performance of the Rh/Ru catalyst was evaluated, and the results show that the conversion rate of methyl acetate and the yield of acetic acid are 96.0% under certain conditions. Furthermore, during the catalysis, no precipitate is formed and the amount of water is greatly reduced. It can be seen that the catalyst has good stability and activity.Keywords:carbonylation;acetic acid;bimetallic catalyst
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Green Energy & Environment
·
2020
·
IF 6.395
Li Cui,Lijuan Wang,Ming Feng,Li Fang,Yanxia Guo,Fangqin Cheng
Lithium (Li) is an important energy metal in the 21st century. However, the selective recovery of Li is still a big challenge, especially from acidic solutions with multiple metal ions existence. Herein we report a new ion pair induced mechanism for selectively extracting Li + from acidic chloride solutions by tributyl phosphate (TBP). It is shown that the acidity and the chloride ions in the aqueous phase have great effects on the extraction of Li + . The FT-IR, UV-Vis and ESI-MS experiments provide solid evidence for the formation of ion-pair complex [Li(TBP) n (H 2 O) m ] + [FeCl 4 ] − (n = 1, 2, 3; m = 0, 1) in the organic phase, which brings about the effective and efficient extraction of Li + . This mechanism can overcome the Hofmeister bias and allow for the selective extraction of Li + from the extremely hydrophilic chlorides. It has also been proved that the loaded Li in TBP can be effectively stripped by concentrated HCl solution with a Li/Fe separation factor > 500. The understanding of the ion-pair transport mechanism is helpful for optimizing the recovery process or further advancing more efficient recovery techniques for Li from acidic liquor.
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JOURNAL OF CONTROLLED RELEASE
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2020
·
IF 7.727
Tao Sun,Guangping Zhang,Zhongyuan Guo,Qinjun Chen,Yujie Zhang,Yongchao Chu,Qin Guo,Chao Li,Wenxi Zhou,Yiwen Zhang,Peixin Liu,Hongyi Chen,Haijun Yu,Liping Jiang,Chen Jiang
Chelating Cu from tumors has been verified as an effective and promising strategy for cancer therapy through antiangiogenesis. However, systematic removal Cu by injecting with Cu chelators will result unavoidable side effects, since Cu is indispensable to the body. In this work, a micelle targeting to tumors' newborn vessels based on a polypeptide was developed to co-load DOX and Probe X, which can go through an “OFF-to-ON” procedure to report the Cu + -capture events in vivo in a real-time way by giving near infrared (NIR) fluorescence and photoacoustic signal. By co-delivering antiangiogenesis and chemotherapeutic reagents, the tumor can be significantly suppressed, meanwhile with a low systematic toxicity. Hopefully, this work can offer new insights in designing sophisticated antitumor strategy.
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JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2020
·
IF 1.701
Long Wang,Zhiming Wang,Cuo Zhou,Weijun Song,Chunyan Sun
A cesium potentiometric microsensor based on magnetic ion-imprinted polymer (MIIP) has been developed for Cs(I) sensing. The core-shell structure Cs(I)-MIIP was synthesized by surface-imprinting technique, using functionalized magnetic Fe3O4@SiO2 microspheres, Cs(I) ion and carboxymethyl chitosan as supporter, template and functional monomers respectively. The resultant Cs(I)-MIIP was used as ionophore in the construction of the PVC membrane electrode to obtain a selective potentiometric microsensor toward Cs(I) ions. The fabricated sensor exhibited a highly sensitive Nernstian response (60.2 mV/decade) over the concentration range of 1 × 10−6 to 1 × 10−1 M of Cs(I). The response time of the microsensor was considerably short (less than 3 s) and its detection limit was determined as 3.0 × 10−7 M. The microsensor was effectively performed in the pH range of 4–6, and revealed desirable selectivity over a wide variety of other cations including alkali, alkaline earth and heavy metals. The proposed microsensor was also used for the determination of Cs(I) contents in the environmental water samples. The potentiometric results were in good harmony with the results obtained by the ICP-MS method.
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TOXICON
·
2021
·
IF 3.033
Xiong Zhang,Chen Feng,Yimao Li,Chenlin Su,Shuxin Zhao,Shengdi Su,Feng Yu,Ji LI
Aristolactam I (AL-I) is the main active ingredient in the Aristolochia plant species, which have been associated with severe nephrotoxicity. In order to investigate the mechanism of AL-I induced renal epithelial-mesenchymal transition (EMT), we established an AL-I induced EMT model in human proximal tubular epithelial cells (HK-2 cells). Biochemical analysis experiment including Morphological examination, 3-(4,5-dimethylthiazol-2-Yl)-2,5-diphenyltetrazolium bromide assay, and Western blot analysis were performed. The results showed that AL-I accumulates in the cytosol causing cytotoxicity and inhibition of proliferation in a concentration- and time-dependent manner. Morphological examination showed that with the increasing concentration of AL-I, the tendency of HK-2 cells transform form epithelial cell to fibroblast cells was stronger. In the Western blot analysis, the expression of α-Smooth muscle actin (α-SMA) and Transforming Growth Factor β1 (TGF-β1) were significantly up-regulated, the expression of E-cadherin was significantly down-regulated after administrating. The ratio of the expression of P-Smad2/3 and Smad2/3 was significantly up-regulated, suggested that TGF-β/Smad-dependent signaling pathway was activated in this process. With presence of TGF-β receptor inhibitor (LY364947), we found that the expressions of three EMT related proteins (E-cadherin, α-SMA and TGF-β1) were obviously reversed. In conclusion, we acknowledge that AL-I can induce renal EMT process in HK-2 cell, which is triggered by the activation of TGF-β/Smad-dependent signaling pathway.
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