CERAMICS INTERNATIONAL
·
2026
·
IF 6
WANG Wei,WANG Song,Y.U. Yiping,L.I. Wei
Conventional granular catalysts exhibit insufficient stability in high-temperature N 2 O catalysis, suffering from issues such as significant bed pressure drop and particle sintering/agglomeration. While light curing molding offers an effective approach for fabricating novel monolithic catalysts to reduce pressure drop and prevent sintering, this method necessitates high-temperature calcination for carrier stabilization, inevitably creating a trade-off between specific surface area and mechanical strength. This study proposes a novel LaMgAl 11 O 19 (LMA) carrier preparation method combining light curing molding with in-situ solid-state synthesis. This approach achieves both precise macro-geometric structuring through light curing molding and simultaneous regulation of LMA crystallization, coarsening, and carrier stabilization via in-situ solid-state reaction, thereby balancing the conflict between carrier strength and specific surface area. The resulting 3D-LMA carrier demonstrates superior performance compared to those produced by traditional 3D-printing methods, maintaining a specific surface area of 10.20 m 2 /g after sintering at 1350 °C with compressive strength reaching 97.62 ± 22.20 MPa. When loaded with Ir to form 3D-Ir/LMA, the catalyst outperforms granular LMA catalysts in N 2 O decomposition tests, exhibiting enhanced catalytic activity and stability. This breakthrough provides new possibilities for meeting the demands of high-temperature N 2 O catalysis.
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高影响因子
INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Sheng-Ping Guo,Zong-Dong Sun,Yang Chi,Huai-Guo Xue
A noncentrosymmetric adduct, SbI3·(S8)3, is obtained by a facile solution method. It crystallizes in the trigonal space group R3m, and its structure features van der Waals force connected, isolated trigonal-pyramidal SbI3 and chairlike S8 units. SbI3·(S8)3 exhibits strong second-harmonic-generation responses around 4 times that of KH2PO4 (1.064 μm) and 1 times that of AgGaS2 (AGS; 2.1 μm) at 210–250 μm, respectively. Under both laser-radiation wavelengths, it exhibits type I phase-matching behavior. Its laser-induced damage threshold is measured to be around 26 times that of AGS under 1.064 μm. To better understand these optical data, theoretical calculations are performed to address its electronic structure and optical properties.
研究领域:
材料科学
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光学
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无机化学
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非线性光学
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晶体工程
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DOI
高影响因子
Acta Biomaterialia
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2019
·
IF 6.638
Fangfang Xia,Jiaqi Niu,Yuping Hong,Chenlu Li,Wen Cao,Lirui Wang,Wenxiu Hou,Yanlei Liu,Daxiang Cui
Nanotheranostics has gained increasing interest, as it offers a great potential to realize personalized diagnostics and therapy. In this work, we report a facile approach of the fabrication of gold nanostars (GNS) attached with matrix metalloproteinases (MMP2) polypeptides (Ac-GPLGIAGQ) and IR-780 iodide through bovine serum albumin (BSA) for targeted dual-modal photoacoustic (PA)/near-infrared (NIR) fluorescence imaging and enhanced photothermal therapy (PTT)/photodynamic therapy (PDT) for lung cancer. MMP2 polypeptides served as the targeting ligand, IR-780 iodide functioned as the NIR fluorescence imaging agent as well as PTT/PDT agent, and GNS acted as the carrier of IR-780 molecules and performed PA imaging and PTT. DLS and CCK-8 assay demonstrated that the nanoprobes (GNS@BSA/I-MMP2) exhibited excellent stability and biocompatibility under physiological conditions. Subsequent in vitro studies verified that GNS@BSA/I-MMP2 nanoparticles (NPs) were effectively internalized by A549 cancer cells and exhibited remarkable antitumor efficacy. Furthermore, GNS@BSA/I-MMP2 NPs could specifically target the tumor and significantly suppress the tumor growth, and their antitumor effects were mainly through the synergistic effects of PDT and PTT based on IR-780 and GNS. These findings imply the potential of GNS@BSA/I-MMP2 NPs as a targeting PA/NIR probe in tumor diagnosis and combined therapy with a single light source. Statement of Significance We reported a convenient and facile approach to load IR-780 iodides in gold nanostars (GNS). This material could simultaneously perform near-infrared imaging/photoacoustic imaging and thermotherapy/photodynamic therapy. MMP2 coating on the surface of GNS@BSA/IR-780 promoted the prepared nanoparticles (GNS@BSA/I-MMP2) to target the tumor region. The heat generated by the synergistic effect of the GNS and IR-780 molecules resulted in the high temperature of the GNS@BSA/I-MMP2 NPs, which efficiently suppressed the growth of tumor, and the tumor volume decreased by 93% compared with that in the PBS groups with laser irradiation.
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2017
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IF 3.648
Yaran Yin,Taotao Fu,Chunying Zhu,Youguang Ma
Densities and viscosities of binary mixtures {[Bmim][BF 4 ] + MDEA}, {MDEA + H 2 O} and ternary mixture {[Bmim][BF 4 ] + MDEA + H 2 O} were measured at T = (293.15–333.15) K. The volumetric and viscometric properties of binary and ternary mixtures, such as excess molar volume ( V E ), viscosity deviation (Δ η ), excess Gibbs energy of activation of viscous flow (Δ G ⁎E ), and Grunberg-Nissan interaction parameter ( G 12 ), were deduced from experimental data. The excess molar volumes and viscosities data were used to calculate the Redlich-Kister and Jouyban-Acree equations coefficients for binary mixtures , and Singh et al. and Jouyban-Acree extended equations coefficients for ternary mixtures. The intermolecular interactions in binary and ternary mixtures were discussed through volumetric and viscometric properties and FT-IR spectroscopic analysis .
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高影响因子
MICROCHIMICA ACTA
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2020
·Vol. 187
·期 7
·1-8
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IF 6.232
Li Shuhuai,Pang Chaohai,Ma Xionghui,Zhao Min,Li Haibo,Wang Mingyue,Li Jianping,Luo Jinhui
A luminescent double recognition nanoprobe is described as a new strategy for the selective determination of chiral molecules. C-dots/Ir/Au fluorescent nanoparticles, synthesised under hydrothermal conditions, are used as a high-performance probe in combination with a molecularly imprinted polymer (MIP) and calix[6]arene as a double recognition element. Thiolated calix[6]arene is grafted on C-dots/Ir/Au as the first recognition element, which then forms a host–guest complex with the target molecule levodopa (L-DOPA). Subsequently, an MIP is prepared on the C-dots/Ir/Au (MIP/C-dots/Ir/Au) by chemical polymerisation. After the removal of L-DOPA, double recognition imprinting cavities are formed. The fluorescence intensity at 478 nm of the nanoprobe is effectively quenched by adsorption of L-DOPA on MIP/C-dots/Ir/Au, which provides a method for L-DOPA determination. Owing to the double recognition strategy, this method has excellent selectivity which can effectively avoid interference from enantiomer D-DOPA, and a imprinting factor of 7.1 is obtained for L-DOPA. This accurate and reliable method, with a wide linear range (5 × 10 −10 to 1.2 × 10 −7 mol L −1 ) and a low limit of detection (1.45 × 10 −10 mol L −1 ), was successfully applied to the determination of L-DOPA in real samples, giving standard recoveries of 89.7–110.0%. Thus, the proposed sensing method provides a viable approach for the determination of a single enantiomer.
Schematic presentation of the MIP/C-dots/Ir/Au for L-DOPA detection. A fluorescence double chiral recognition nanoprobe is prepared of C-dots/Ir/Au nanoparticles as signal probe, and a molecularly imprinted polymer (MIP) and calix[6]arene as a double recognition element. Owing to the double recognition strategy, this method has strong specificity and can effectively avoid interference from enantiomers and racemates.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Shuhuai Li,Guihao Yin,Xuejin Wu,Chunhua Liu,Jinhui Luo
A novel supramolecular imprinted electrochemical sensor was developed for carbofuran (CBF) determination based on a multiwalled carbon nanotube-supported Pd-Ir nanocomposite catalyst (MWCNT/Pd-Ir) with methylene blue (MB) signal amplification. First, MWCNT/Pd-Ir composite nanoparticles were synthesized and used to modify the surface of a glassy carbon electrode; then, a molecular imprinted polymer for CBF was prepared by electropolymerization , with MB-doped o -phenylenediamine as the functional monomer and a 4-tert-butylcalix[8]arene-CBF (4TB[8]A-CBF) supramolecular complex as the template. The electrical signals were controlled though the elution and re-adsorption of CBF. Due to the double catalysis by the MWCNT/Pd-Ir and MB, the current intensity for CBF was obviously amplified. Additionally, because of the double recognition by the 4TB[8]A and MIP, the sensors showed outstanding CBF identification properties. The method was applied to detect CBF in agricultural products, and the satisfactory results were obtained.
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高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Ruoyuan Li,Aixia Li,Junhua Li,Yao Wang,Zhiming Liu
Selective catalytic reduction of NO x by CO (CO-SCR) in the presence of O 2 is challenging because in this process CO is prone to being oxidized by O 2 , thus inhibiting NO x reduction by CO. Furthermore, SO 2 typically leads to the deactivation of the CO-SCR catalyst. Herein, a significant promoting effect of SO 2 on Ir/SiO 2 catalyst for the CO-SCR of NO x in the presence of O 2 is reported. In-situ X-ray Absorption Fine Structure (XAFS) and X-ray photoelectron spectroscopy (XPS) analysis showed that SO 2 does not affect the chemical nature of Ir 0 under reaction conditions. However, SO 2 can be oxidized to sulfate and deposit on the catalyst surface. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analysis demonstrated that the presence of SO 2 can inhibit the CO + O 2 reaction, thus leaving more CO available to reduce NO x over the active Ir 0 sites. As a result, the reduction of NO x is remarkably promoted even in the presence of O 2 and SO 2 .
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Theranostics
·
2020
·
IF 8.579
Wanbing Qin,Guilan Quan,Ying Sun,Minglong Chen,Peipei Yang,Disang Feng,Ting Wen,Xinyu Hu,Xin Pan,Chuanbin Wu
High aggressiveness and recurrence of melanoma tumors require multiple systemic drug administrations, causing discomfort and severe side effects to the patients. Topical treatment strategies that provide repetitively controllable and precise drug administrations will greatly improve treatment effects. Methods: In this study, a spatiotemporally controlled pulsatile release system, which combined dissolving microneedles (DMNs) and thermal-sensitive solid lipid nanoparticles (SLNs), was constructed to realize multiple doses of dual-modal chemo-photothermal therapy in a single administration. Paclitaxel (PTX) and photothermal agent IR-780 were encapsulated into SLNs and were concentrated in the tips of DMNs (PTX/IR-780 SLNs @DMNs). Equipped with several needles, the DMN patch could be directly inserted into the tumor site and provide a stable “Zone accumulation” to constrain the PTX/IR-780 SLNs at the tumor site with uniform distribution. Results: In vitro experiments showed that after irradiation with near-infrared light, the PTX/IR-780 SLNs gradually underwent phase transition, thereby accelerating the release of PTX. When irradiation was switched off, the PTX/IR-780 SLNs cooled to re-solidify with limited drug release. Compared with intravenous and intratumoral injections, very few SLNs from PTX/IR-780 SLNs @DMNs were distributed into other organs, resulting in enhanced bioavailability at the tumor site and good safety. In vivo analysis revealed that PTX/IR-780 SLNs @DMNs exhibited significant anti-tumor efficacy. In particular, the primary tumor was completely eradicated with a curable rate of 100% in 30 days and the highest survival rate of 66.67% after 100 days of treatment. Conclusion: Herein, we developed a DMN system with a unique spatiotemporally controlled pulsatile release feature that provides a user-friendly and low-toxicity treatment route for patients who need long-term and repeat treatments.
研究领域:
药学
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癌症治疗
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纳米技术
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生物医学工程
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Debao Liu,Baolu Shi,Chenqi Wang,Zeshuai Li,Xianbo Wang,Baosheng Xu,Lijie Qu
Herein, the SiC ceramic aerogels with in-situ growth of SiC nanowires (SiC w /SiC CAs) have been synthesized by polymer‐derived ceramics (PDCs) method. The morphology, microstructure, and phase composition of the as-prepared samples were systematically investigated through SEM, XRD , TEM , Raman spectrum, FT-IR spectrum, and XPS spectrum techniques. The results showed that the as-obtained SiC w has a diameter of about 80 nm and a length of 1–3.5 μm. In addition, the formation mechanism and evolution process of growth SiC w were systematically studied using a VLS growth mechanisms. The way in this work could be expanded to synthesize other Si-based porous ceramic aerogel nanostructed with nanowires.
研究领域:
材料科学
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纳米技术
·
陶瓷
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Qihong Xue,Zhikui Jiang,Chao Wang,Xian Kan,Jiaming Wang,Jiangang Chen
13-Ni/ZrO2, 13-Ni3P/ZrO2, 13-Ni/SiO2, and 13-Ni3P/SiO2 catalysts were used in the hydrogenation of diethyl oxalate (DEO) to ethyl glycolate (Egly) to investigate the modulating effect of phosphorus. XRD, TEM and FT-IR results show that phosphorus act as a divider of Ni metallic particle and shows a segregation effect. The presence of P transformed the linkage of surface metals from the original -Ni-Ni-Ni-Ni- to the P-Ni-P-Ni-P state, and FT-IR shows that the former adsorbed CO in a combination of linear and bridging adsorption mode, whereas the latter predominantly in CO linear adsorption. Bridging adsorption is via dual sites and makes the preliminary hydrogenation products less likely to detach from the catalyst surface thus facilitating deep hydrogenation, while linear adsorption facilitates partial hydrogenation by a rapid detachment of intermediate product like Egly. The various loading Ni3P/SiO2 catalysts show incomplete phosphorylation with increasing nickel loading, giving rise to a state of coexistence of Ni and Ni3P crystalline phases. This may lead to a coexistence of surface -Ni-Ni-Ni-Ni- and P-Ni-P-Ni-P and the corresponding assort of adsorption, e.g. bridging/linear ones, making deep hydrogenation occur partially besides stepwise hydrogenation.
研究领域:
催化
·
材料科学
·
化学工程
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高影响因子
ACS Sensors
·
2022
·
IF 9.618
Yue Xu,Haiyan Chen,Shufen Xu,Ji Liu,Yang Chen,Lijuan Gui,Hua Li,Ruixi Li,Zhenwei Yuan,Bowen Li
Several photosensitizers have recently been proposed as novel approaches against β-lactamase-producing drug-resistant bacteria. However, these reported photosensitizers are rarely used for accurate recognition of drug-resistant bacteria. To tackle this challenge, the structurally modified photosensitizer CySG-2 based on a lipophilic cationic heptamethine indocyanine near-infrared (NIR) dye (IR-780) and an important synthesis intermediate of cephalosporin antibiotic (GCLE) not only achieved the accurate recognition of TEM-1 methicillin-resistant Staphylococcus aureus (MRSA) successfully but also achieved antimicrobial photodynamic therapy (aPDT) in animal models infected by drug-resistant bacteria. Accurate enzyme recognition and efficient photodynamic therapy capabilities allow CySG-2 to achieve one stone with two birds. In addition, CySG-2 could also promote the eradication of internalized MRSA by facilitating the autophagy process, which is synergistic with its capacity of inducing reactive oxygen species generation under NIR laser irradiation for aPDT. Collectively, it is an effective multifunctional photosensitizer with the potential ability to guide the optimal use of different antibiotics and apply them in clinical treatment.
研究领域:
药学
·
微生物学
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生物医学工程
·
传染病学
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DOI
PubMed
高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2016
·
IF 2.336
Tianzhi Yu,Yanjun Bao,Yuling Zhao,Hui Zhang,Zixuan Xu,Xiaomeng Wu
Two new red-emitting Ir(III) complexes containing 2-(1-naphthyl)benzothiazole as cyclometalated ligands and the carrier transporting group-functionalized picolinate as ancillary ligands have been successfully synthesized and characterized. The Ir(III) complexes have good thermal stability with less than 2% weight-reduction occurring at 285 °C, and exhibit strong red emissions. The doped light-emitting devices using the Ir(III) complexes as dopants were fabricated. The result indicated that the light-emitting devices fabricated by the carbazole-functionalized complex and the diaryl-1,3,4-oxadiazole-functionalized complex exhibited red emissions with a maximum brightness of 3074 and 2520 cd/m 2 at 10.7 V and a maximum current efficiency of 4.84 and 5.18 cd/A, respectively.
研究领域:
材料科学
·
有机电子学
·
无机化学
·
光物理
·
光电功能器件
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高影响因子
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