APPLIED CATALYSIS A-GENERAL
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2023
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IF 5.5
Chengming Wu,Hongbo Chen,Jifan Li,Chun-Ling Liu,Wen-Sheng Dong
Efficient production of renewable p -xylene (PX) from bio-based 2,5-dimethylfuran (DMF) and ethylene is challenging. Herein, novel nanoflake-like zirconium-tin phosphate catalysts were synthesized, and their catalytic performance was evaluated in the conversion of DMF and ethylene to PX. The DMF conversion, PX selectivity and PX yield reached up to 99%, 95.2% and 94.2%, respectively over Zr 0.6 Sn 0.4 P under relatively mild conditions. The PX productivity was 61.1 mmol PX ·g cat −1 ·h −1 , which is better than that of previously reported catalysts. By combining characterization with activity test, it was found that enhanced DMF and ethylene adsorption is beneficial to promoting the reaction between DMF and ethylene. Precise regulation of acid sites is crucial for inhibiting the occurrence of side reactions and improving the selectivity of PX. The kinetic analysis revealed that Zr 0.6 Sn 0.4 P had a relatively low apparent activation energy (39 kJ·mol −1 ) for this reaction than previously reported catalysts. In addition, the Zr 0.6 Sn 0.4 P catalyst exhibited an excellent reusability.
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高影响因子
Materials Today Chemistry
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2023
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IF 7.3
Yibo Niu,Yu Wang,Linli He,Yujie Wang,Huizhen Ma,Nan Li,Danli Xie,Jianshan Ye,Ying Ma
Cathodic photoelectrochemical (PEC) bioanalysis has been attracting great interest due to its excellent anti-interference capability. As a p-type wide energy band gap semiconductor, CuI is regarded as an ideal material for the construction of photocathodes, while its poor stability and narrow light absorption range limit its application as a photoelectrode in PEC sensing. Herein, we report a simple in-situ growth strategy to synthesize CuI/Porphyrin-based graphdiyne (PDY) p-n heterojunction as a photocathode. CuI crystals were firstly deposited on the ITO glass surface via the electrochemical deposition , and CuI could catalyze the in-situ Glaser coupling reaction of 5,10,15,20-tetra(4-ethynylphenyl) porphyrin (TEPP), allowing the growth of PDY film on the CuI crystal surface and forming the p-n heterojunction photocathode. The as-prepared PDY film plays a crucial role in the significant enhancement of PEC performance because of its intense light absorption, and the formation of CuI/PDY p-n heterojunction can efficiently promote the transportation of photogenerated carriers between CuI and PDY thanks to the excellent electrical conductivity and high carrier mobility of highly π-conjugated PDY. After the growth of PDY, the photocurrent response of PDY/CuI/ITO is almost seven folds higher compared to that of CuI/ITO. Owing to the selective Cu–S bond interaction between l -cysteine (L-Cys) and Cu + , a PEC sensor for the L-Cys determination is developed with a broad linear range from 0.05 to 1.2 μM and a limit of detection (LOD) of 0.03 μM.
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Advanced Healthcare Materials
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2023
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IF 10
Yupeng Guan,Hanqi Lei,Chengyuan Xing,Binyuan Yan,Bingbiao Lin,Xiangwei Yang,Hai Huang,Yang Kang,Jun Pang
Chemotherapy remains the most essential treatment for prostate cancer, but multidrug resistance (MDR) contributes to chemotherapy failure and tumor-related deaths. The overexpression of P-glycoprotein (P-gp) is one of the main mechanisms behind MDR. Here, we report a multimodal nanoplatform with a reactive oxygen species (ROS) cascade for gas therapy/ferroptosis/chemotherapy in reversing MDR. The nanoplatform disassembles when responding to intracellular ROS and exerts three main functions: First, NO-targeted delivery could reverse MDR by downregulating P-gp expression and inhibiting mitochondrial function. Second, ferrocene-induced ferroptosis breaks the redox balance in the tumor intracellular microenvironment and synergistically acts against the tumor. Third, the release of paclitaxel is precisely controlled in situ in the tumor for chemotherapy that avoids damage to normal tissues. Excitingly, this multimodal nanoplatform is a promising weapon for reversing MDR and may provide a pioneering paradigm for synergetic cancer therapy. This article is protected by copyright. All rights reserved
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高影响因子
LANGMUIR
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2023
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IF 3.9
Fang Chen,Li Yin,Teng He,Tao Chen,Hangbo Yue,Chufen Yang
To enhance the stability of the polymeric micelles and optimize their drug-controlled release ability, three disulfide-linked polyethylene glycol methyl ether methacrylate–disulfide–poly(ε-caprolactone-co-γ-amine−ε-caprolactone) (PPEGMA-SS-P(CL-co-ACL)) polymers were synthesized and characterized by 1H NMR, GPC, and FT-IR successfully, and their dual pH/reduction-responsive cross-linked polymeric micelles were prepared for paclitaxel (PTX) delivery by using 2,3-dimethylmaleic anhydride (DMMA) as the cross-linking agent. The PTX loading capacity (LC) and encapsulation efficiency (EE) values of the cross-linked micelles formed by PPEGMA8-SS-P(CL47-co-ACL15) achieved were 23.96% and 71.58%, slightly higher than those of un-cross-linked micelles. Both particle sizes of blank micelles and in vitro drug release of PTX-loaded micelles confirmed that compared with those un-cross-linked micelles, the cross-linked micelles were more stable at pH 7.4 + 0 mM DTT, with a PTX cumulative release of 13% at 120 h, while the PTX cumulative release of the cross-linked micelles at pH 5.0 + 10 mM DTT were close to that of un-cross-linked micelles after 60 h, indicating the successful reversible cross-linking and smooth drug release of the cross-linked micelles. The cytotoxicity assay showed that PPEGMA8-SS-P(CL47-co-ACL15) and its cross-linked micelles had low cell cytotoxicity, and both PTX-loaded micelles revealed a certain inhibitory effect on HepG2 cells. These results revealed that the dual pH/reduction-responsive cross-linked polymeric micelles prepared from PPEGMA8-SS-P(CL47-co-DCL15) were a promising candidate for PTX delivery.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Jiayou Liu,Xiaoxiang Huang,Lizhen Hu,Penglei Liu,Liuhu Jia,Keiko Sasaki,Zhongchao Tan,Hesheng Yu
Simultaneous avoidance of secondary air pollution and catalyst deactivation remains a challenge for existing photocatalytic removal of nitric oxide (NO). Herein, a photocatalysis-adsorption (P-A) heterojunction is synthesized for eco-friendly NO removal by facilely grinding Pd single atoms (Pd 1 ) anchored g-C 3 N 4 (48CN/Pd) with UiO-66-NH 2 (UION). Under visible-light irradiation, the 40UION-CN/Pd composite shows 93.91 % of NO removal efficiency with only 2.73 % of NO 2 emissions and negligible catalyst deactivation. The DeNO x index increases remarkably from −0.66 for 48CN/Pd to 0.86 for 40UION-CN/Pd. Furthermore, the synthesized P-A heterojunction efficiently removes NO from real flue gases produced by a domestic coal-fired stove and from SO 2 -rich flue gases. The mechanism exploration based on experimental investigations and density functional theory (DFT) calculations reveals that UION captures the NO 2 selectively produced by 48CN/Pd, simultaneously suppressing NO 2 emissions and refreshing active sites for NO photooxidation. Moreover, the results of X-ray photoelectron spectroscopy (XPS), charge density difference calculation, energy-resolved distribution of electron traps (ERDT) and in-situ Kelvin probe force microscopy (KPFM) reveal that the built-in electric field and Type-II heterojunction formed between 48CN/Pd and UION promote the separation of photogenerated carriers, enhancing the catalytic activity of the composite. This work provides an innovative strategy to avoid NO 2 emission and catalyst deactivation during photocatalytic NO removal.
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Surfaces and Interfaces
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2023
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IF 6.2
Jing Xu,Qian Li,Xinyu Liu,Qian Yang
S-type heterojunction is a new type of photocatalytic heterojunction that can efficiently enhance the performance of photocatalytic hydrogen-producing. In this paper, NiAl-LDH/P-MoO 3 composite catalysts were prepared, NiAl-LDH, P-MoO 3 and NiAl-LDH/P-MoO 3 were characterized, tested and analyzed from the aspects of morphology, structure and spectrum. The 5 h hydrogen-producing amount of NiAl-LDH/P-MoO 3 reaches 298.72 μmol, which is 160 times and 16 times that of MoO 3 and NiAl-LDH under the visible light , respectively. The doping of P narrows the band gap of MoO 3 and is more helpful to the electronic transmission. The irregular P-MoO 3 nanorods with a diameter of about 200 nm are attached to 3-4 μml NiAl-LDH nanoflower . The construction of S-type heterojunction changes the electronic transmission pathway of NiAl-LDH/P-MoO 3 while improving the electron-hole pair separation ratio of NiAl-LDH/P-MoO 3 . The strong oxidizing ability of P-MoO 3 and the strong reducing ability of NiAl-LDH are retained. Effective control of electronic transmission path improves the photocatalytic hydrogen-producing activity and stability of NiAl-LDH/P-MoO 3 , which provides a certain theoretical support for the realization of photocatalytic high-efficiency HER by constructing heterojunction.
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BIOSENSORS & BIOELECTRONICS
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2023
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IF 12.6
Caixia Sun,Xue Zhang,Hao Huang,Ya Liu,Xianwei Mo,Yufei Feng,Jiahong Wang,Wenhua Zhou,Paul K. Chu,Xue-Feng Yu,Wenxin Liu
Nanozymes with enzyme-like characteristics have drawn wide interest but the catalytic activity and substrate selectivity of nanozymes still need improvement. Herein, Se-vacancy-rich TiSe 2-x @Au nanocomposites are designed and demonstrated as nanozymes. The TiSe 2-x @Au nanocomposites show excellent peroxidase-like activity and the chromogenic substrate p-phenylenediamine (PPD) can be selectively oxidized to compounds that exhibit an absorption peak at 413 nm that differs from that of self-oxidation or generally oxidized species, suggesting high catalytic activity and strong substrate selectivity. Theoretical calculations reveal that the PPD adsorption geometry at Se vacancies with an adsorption energy of −3.00 eV shows a unique spatial configuration and charge distribution , thereby inhibiting the free reaction and promoting both the activity and selectivity in PPD oxidation . The TiSe 2-x @Au colorimetric system exhibits a wide linear range of 0.015 mM–0.6 mM and a low detection limit of 0.0037 mM in the detection of glucose. The blood glucose detection performance for human serum samples is comparable to that of a commercial glucose meter in the hospital (relative standard deviation < 6%). Our findings demonstrate a new strategy for rapid and accurate detection of blood glucose and our results provide insights into the future design of nanozymes.
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ANALYTICAL BIOCHEMISTRY
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2023
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IF 2.9
Ye Sun,Guangda Xu,Yue Wang,Peng Song,Yao Zhang,Lixin Xia
Herein, we developed a concise, time-efficient, and high selective assay for detecting Fe 2+ through its triggered surface plasmon-assisted reduction reaction of p -nitrothiophenol (PNTP) to p,p ′-dimercaptoazobenzene (DMAB) on the surface of gold nanoparticles (AuNPs) based on surface-enhanced Raman scattering (SERS) spectroscopy. When Fe 2+ was added to the PNTP-AuNPs system, the appearance of three characteristic peaks at 1142, 1392, and 1440 cm −1 attributed to DMAB demonstrated that Fe 2+ induced the catalytic coupling reaction of PNTP. The Raman intensity ratio of the peak at 1142 cm −1 to the peak at 1336 cm −1 and the concentration of Fe 2+ presented a good linear response from 10 to 100 μM with a limit of detection (LOD) of 0.35 μM. More importantly, the entire detection process can be completed within 2 min and further successfully used for the detection of Fe 2+ in river water.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Feng Zhou,Jiadong Chen,Yun Yang,Xiaofeng Ke,Xue Liu,Lijie Zhang,Jun Li,Huile Jin,Shun Wang,Ying Li,Chenliang Su
Development of Ru-based electrocatalysts for acidic oxygen evolution reaction without a trade-off between activity and durability remains challenging. Herein, we constructed Co 3 O 4 /RuO 2 heterojunctions anchored on carbon (Co 3 O 4 /RuO 2 -C) with a low Ru loading (2.74 wt%), in which strong coupled p-n junctions facilitated electron transfer from RuO 2 to Co 3 O 4 . The Co 3 O 4 /RuO 2 -C demonstrated a low overpotential of 170 mV at 10 mA cm −2 and long-term stability in 0.1 M HClO 4 due to its unique structure. The origin of its high performance in acidic OER was revealed by the combination of in-situ attenuated total reflection infrared and Raman tests. Concretely, oxygen generation for Co 3 O 4 /RuO 2 -C was dominated by the adsorbate evolution mechanism, and the introduction of Co 3 O 4 facilitated the redox of RuO 2 , generating active sites for OER. Theoretical calculations further substantiated that the Co 3 O 4 /RuO 2 heterojunctions possessed lower energy barriers for OER. This work provides a compelling synthesis route for effective and stable electrocatalysts for acidic OER.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Weiting Yu,Dezheng Yang,Rendan Zhu,Luzhen Liu,Yan Yu,Juntao Tang,Zhiqiao He,Jiexu Ye,Shuang Song
The photoassisted electrochemical CO2 reduction reaction (CO2RR) toward CO is considered one of the most promising routes of CO2 utilization. In this work, 2,6-diaminopyridine (2,6-DAP) with both the pyridine ring and the –NH2 functional group is utilized for the first time to functionalize the surface of the electrode. The p-Si/Ag/2,6-DAP electrode has been identified as a good catalyst with relatively high activity and CO selectivity at a low overpotential as well as good stability. The Faradaic efficiency of CO is 84.56% at an optimized potential of −0.9 V vs reversible hydrogen electrode (RHE). A synergistic mechanism has been proposed for the enhanced catalytic performance of p-Si/Ag/2,6-DAP in the CO2RR. Ag facilitates the reduction of CO2 to produce CO. 2,6-DAP helps CO2 adsorption and inhibits the competitive hydrogen evolution reaction accompanying the CO2RR under low potentials.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Ling Sun,Chenghao Yang,Huixin Wang,Xin Jin,Xu Li,Xiangji Liu,Ping Zhu,Chaohong Dong
Imparting flame retardancy to polyester fabrics is still a pressing issue for the textile industry. To this end, a composite coating was developed by phosphite, pentamethyldisiloxane, urea and sodium alginate , and then applied together with calcium chloride to prepare flame-retardant polyester fabrics. The optimized polyester fabrics named PF-HUSC exhibited a rough surface with P, Si, N and Ca element distributions, as observed by scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDX). Flame retardancy evaluations showed that the damaged length of PF-HUSC with a limiting oxygen index (LOI) value of 35.3 ± 0.3 % was reduced from the contrastive 17.6 ± 0.4 cm to 4.6 ± 0.2 cm after vertical burning test. Thermogravimetric (TG) test confirmed that PF-HUSC retained a char residue as high as 35.1 % at 700 °C. Cone calorimetry test displayed that the total heat release (THR) and total smoke production (TSP) values of PF-HUSC were reduced to 3.1 MJ/m 2 and 1.1 m 2 , respectively, as compared to those of pure polyester fabrics. More importantly, PF-HUSC still exhibited higher LOI value than that of pure polyester fabrics after 25 washing cycles. Hence, the coating scheme is considered as a new method to expand the preparation of flame-retardant polyester fabrics.
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ACS Applied Nano Materials
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2023
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IF 5.9
Fengyu Tian,Mingzhao Zhu,Xuebiao Sun,Xuemin Yan
Selective CO2 photoreduction to valuable chemicals is promising for a carbon-neutral future and still remains a challenge. Herein, Zn vacancy-rich ZnO (Zn1–xO) nanoparticles were used as cocatalyst to construct a Zn1–xO/TiO2 nanostructure via the self-assembly process. The existence of Zn vacancies triggered the intimate contact between Zn1–xO and TiO2 through the Ti–O–Zn bonds. Theoretical and experimental results show that the hybridization of Zn1–xO and TiO2 resulted in the formation of a p–n heterojunction, leading to the enhanced separation efficiency of photoinduced electron–hole pairs. As a result, the optimized Zn1–xO/TiO2 nanocomposite exhibited nearly 100% selectivity of CO2-to-CO photoreduction, and the productivity was 4.2 times higher than that of pristine TiO2. In situ Fourier transform infrared spectra along with theoretical calculations were also conducted to investigate the mechanism of the selective photocatalytic CO2-to-CO process. It is concluded that the charge depletion on the TiO2 surface induced by the charge transfer from Zn1–xO to TiO2 can lower the energy barrier of CO* desorption and convert the endothermic CO* desorption process into an exothermic reaction step, thus triggering selective CO production. This work provides a new perspective on the rational fabrication of nanostructures for efficient and selective photocatalytic CO2 conversion through intermediate modulation.
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