NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 10
·4666-4676
·
IF 3.925
Wei Ma,Binghua Yao,Qian Yang,Ting Zhang,Kecong Tian,Wen Zhang,Jinfen Niu,Yan Yu,Zheng Chang,Yangqing He
In this study, ultrathin MoSe2 nanosheets (MoSe2 NSs) with enriched selenium vacancies (Se-vacancies) were prepared via a HNO3-assisted exfoliation strategy. The features of the synthesized catalysts were characterized via SEM, TEM, XRD, EPR, Raman spectroscopy, XPS, BET, EIS, PFM and contact angle tests. The results showed that the optimum MoSe2 NSs-10 with an enlarged specific surface area had superior hydrophilicity and conductivity. Meanwhile, MoSe2 NSs-10 showed typical butterfly-shaped amplitude curves and 150° polar domain switching, which confirmed its out-of-plane ferroelectricity. This out-of-plane polarization originated from the unique AB stacking mode of the MoSe2 NSs, contributing to the polarization enhancement. These superior properties of MoSe2 NSs-10 were responsible for its enhanced piezocatalytic degradation efficiency of tetracycline (TC) compared with that of pristine MoSe2 nanoflowers (NFs). Under ultrasonic irradiation, 93.9% TC was degraded by MoSe2 NSs-10 within 30 s, which was over 3.6-fold higher than that by the MoSe2 NFs. Additionally, the active species trapping tests and electron spin resonance (ESR) measurements proved that both hydroxyl radicals (˙OH) and superoxide radicals (˙O2−) participated in the degradation of TC as major active species. The degradation pathways of TC over the MoSe2 NSs-10 piezocatalytic system were proposed based on HPLC-MS analysis. This work provides a new approach for improving the piezocatalytic performance of MoSe2 piezocatalysts towards antibiotic wastewater treatment.
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Asian Journal of Pharmaceutical Sciences
·
2022
·
IF 9.273
Yaqiao Li,Lingxiao Li,Qianhui Jin,Tian Liu,Jin Sun,Yongjun Wang,Zhijun Yang,Zhonggui He,Bingjun Sun
PEGylation has been widely used to improve the pharmacokinetic properties of prodrug self-assembled nanoparticles (prodrug-SANPs). However, the impacts of the amount of PEG on the self-assemble stability, cellular uptake, pharmacokinetics, and antitumor efficacy of prodrug-SANPs are still unknown. Herein, selenoether bond bridged docetaxel dimeric prodrug was synthesized as the model prodrug. Five prodrug-SANPs were designed by using different mass ratios of prodrugs to PEG (W prodrug /W DSPE-mPEG2000 = 10:0, 9:1, 8:2, 7:3 and 6:4), and defined as Pure drug NPs, 9:1NPs, 8:2NPs, 7:3 NPs and 6:4 NPs, respectively. Interestingly, 8:2 NPs formed the most compact nanostructure, thus improving the self-assemble stability and pharmacokinetics behavior. In addition, the difference of these prodrug-SANPs in cellular uptake was investigated, and the influence of PEG on cytotoxicity and antitumor efficacy was also clarified in details. The 8:2 NPs exhibited much better antitumor efficacy than other prodrug-SANPs and even commercial product. Our findings demonstrated the pivotal role of the amount of PEG on prodrug-SANPs.
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Journal of Nanomaterials
·
2022
·
IF 3.791
Ziyang He,Huan Liu,Fei Xie,Mingyu Bai,Shuai Wen,Jijie Zhao,Weiguo Liu
By the photodetector manufactured using traditional semiconductor materials, such as HgCdTe and InGaAs, it is difficult to broaden the application range of such photodetectors due to their high cost and complex manufacturing process. PbSe colloidal quantum dots (CQDs) have the potential to shift the working range of photodetector from visible to infrared wavelength region, and it also has high photoresponsivity. Herein, we report the characterization of PbSe CQDs synthesized using a facile solution process, as well as the relationship between the size of nanocrystal and the reaction temperature. The films of PbSe CQDs are deposited using the layer-by-layer (LbL) spin-coating method, which is then used to fabricate the photoconductive device. The fabricated device is found to have an efficient response in a broad spectrum range of 400-2600 nm. The device maintains good responsivity of ~320 mA/W at room temperature. Its external quantum efficiency was quite high in the shorter wavelength infrared region, and it has approximately 14% external quantum efficiency (EQE) at 2520 nm. The device demonstrated excellent performance, confirming that PbSe colloidal quantum dots is a promising material for future broadband spectrum photodetectors.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shirong Qin,Hanlun Xu,Mengjuan Liu,Nasir Ali,Yansong Chen,Sihan Zhao,Huizhen Wu
Two-dimensional (2D) photodetectors based on semiconducting transitional metal chalcogenides (TMDs) have attracted much attention because of its unique mechanical and opto-electronic properties which can be integrated into nanoscale-sized opto-electronic devices and complex circuits. However, the photodetection range of 2D TMDs materials based detectors are generally limited within the visible range due to its intrinsic relatively large band-gap. In addition, 2D TMDs materials also suffers from weak light absorption inherited from their atomically thin layers, resulting in a photoresponsivity that can be further improved. Herein, by combining 2D MoS 2 with zero-dimensional (0D) PbSe quantum dots (QDs) and Au nanocrystals (NCs), a novel 2D-0D photodetector (i.e., MoS 2 /PbSe@Au) is fabricated. Our MoS 2 /PbSe@Au photodetector exploits the 2D MoS 2 as the conduction channels and PbSe@Au NCs as light sensitizer, which promote the absorption of the entire device and enable appreciable photodetection extending to the near-infrared (NIR). Prominently, the mixed-dimensional photodetector exhibits high responsivity of 1.22 A/W and detectivity of 1.56*10 9 Jones (cm·Hz 1/2 ·W −1 ) at NIR (e.g., 1064 nm) compared with the MoS 2 photodetector with PbSe QDs only, which are ascribed to the more efficient two-step charge transfer process between PbSe and MoS 2 with the presence of Au NCs. We further identify the new carrier multiplication mechanism when comparing the photoresponse of our photodetectors at 405 nm and 635 nm. We found the extremely high EQE of MoS 2 /PbSe@Au photodetector at the wavelength of 405 nm (268.1%) could be ascribed to the synergism of carrier multiplication (CM) in PbSe QDs and the photo-gating effect induced by Au nanoparticles. Our study demonstrates that the novel mixed-dimensional photodetectors based on CVD-grown MoS 2 may provide a new route for designing and realizing high-performance optoelectronic devices with harvesting merits of hybrid nanomaterials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Limin Zhang,Wenfei Zhang,Minglang Wang,Hui Wang,Jinhao Zang,Weixia Shen,Xiaowen Huang,Dezhi Kong,Yongtao Tian,Tingting Xu,Ye Wang,Xinjian Li
The stacking of Molybdenum Diselenide (MoSe 2 ) nanomaterials as well as its poor intrinsic conductivity lead to sluggish water dissociation kinetics, which limit the performance of the alkaline hydrogen evolution reaction (HER). Herein, we constructed Nickel Hydroxide Ni(OH) 2 -MoSe 2 heterostructures directly on 3D self-supporting carbon cloth (CC) substrate via a simple hydrothermal and the subsequent chemical bath deposition process, then systemically studied the effect of the Ni(OH) 2 deposition time on the HER performance. The synergistic effect between Ni(OH) 2 and MoSe 2 in the Ni(OH) 2 -MoSe 2 heterostructures optimizes the poor conductivity and Gibbs free energy for water adsorption, thus improving the water dissociation kinetics and giving rise to fast electron transfer in the HER process. The Ni(OH) 2 -MoSe 2 /CC constructed in this way with a Ni(OH) 2 deposition times of 30 min performs good catalytic activities with a low overpotential of 130 mV at - 10 mA cm - 2 , a low Tafel slope of 78.2 mV dec -1 and good stability. Our results suggest that interface engineering combining with conductive substrate are conducive to enhance alkaline HER activity of MoSe 2 and other similar transition metal dichalcogenides.
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JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 2
·486-494
·
IF 2.047
Wang Xiaochun,Zhou Zhiwei,Lin Xuesong
In this work, we introduced two-dimensional (2D) WSe 2 with the lowest heat conductivity to enhance thermoelectric properties of the non-toxic and cost-effective SnTe. On one hand, the improved power factor can be attributed to the enhancement of Seebeck coefficient due to the decrease of low-energy carriers and minority carriers by the addition of WSe 2 -SnTe p - p -type heterojunction interface barriers. On the other hand, the thermal conductivity also decreased sharply by the heightened phonon scattering from the high-density stacking faults and multiscale hierarchical architectures. Ultimately, benefiting from the dual regulation effect of the introduction of 2D WSe 2 on the electro-acoustic decoupling, an improved figure of merit ( ZT ) of 1.0 is achieved for the composition of SnTe + 6 wt% WSe 2 at 873 K, which is enhanced by 134% in comparison with the pure SnTe sample. Moreover, the meaningful attempt represents an effective and feasible strategy for mixing SnTe with other compounds by the method of ball milling. Graphical Abstract
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Chengchao Wang,Ze Wang,Datong Wu,Wenrong Cai,Yong Qin,Yong Kong
We report on a hollow NiCoSe 2 /C prepared through a step-by-step derivatization method as high-performance supercapacitor electrode. Hollow nickel-cobalt bimetallic layered hydroxide (NiCo-LDH) derived from a typical zeolitic imidazolate framework (ZIF-67) was selenized to NiCoSe 2 via in situ selenylation, which was then coated with a layer of carbon via the hydrothermal method by using glucose as the carbon source. The electrochemical performances of the as-synthesized NiCoSe 2 /C are investigated, and the results indicate that the hollow NiCoSe 2 /C exhibits considerable specific capacity of 232.6 mAh g −1 at 1 A g −1 , good rate capability of 72.6% and high capacity retention of 88.3% after 5,000 cycles. Compared with ZIF-67, NiCo-LDH and NiCoSe 2 , the greatly enhanced electrochemical performances of the NiCoSe 2 /C can be due to the hollow nanostructure of NiCoSe 2 , enhanced electrical conductivity by the introduction of Se and C, and inhibited volume changes during the redox cycling from the protection of the carbon layer.
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ACS Nano
·
2023
·
IF 17.1
Tong Yuan,Jitong Yan,Qingfeng Zhang,Yong Su,Shuhong Xie,Bingan Lu,Jianyu Huang,Xiaoping Ouyang
The conversion and alloying-type anodes for potassium-ion batteries (PIBs) have drawn attention. However, it is still a challenge to relieve the huge volume expansion/electrode pulverization. Herein, we synthesized a composite material comprising Bi0.48Sb1.52Se3 nanoparticles uniformly dispersed in carbon nanofibers (Bi0.48Sb1.52Se3@C). Benefiting from the synergistic effects of the high electronic conductivity of Bi0.48Sb1.52Se3 and the mechanical confinement of the carbon fiber that buffers the large chemomechanical stress, the Bi0.48Sb1.52Se3@C//K half cells deliver a high reversible capacity (491.4 mAh g–1, 100 cycles at 100 mA g–1) and an extraordinary cyclability (80% capacity retention, 1000 cycles at 1000 mA g–1). Furthermore, the Bi0.48Sb1.52Se3@C-based PIB full cells achieve a high energy density of 230 Wh kg–1. In situ transmission electron microscopy (TEM) reveals an intercalation, conversion, and alloying three-step reaction mechanism and a reversible amorphous transient phase. More impressively, the nanofiber electrode can almost return to its original diameter after the potassiation and depotassiation reaction, indicating a highly reversible volume change process, which is distinct from the other conversion type electrodes. This work reveals the stable potassium storage mechanisms of Bi0.48Sb1.52Se3@C composite material, which provides an effective strategy to enable conversion/alloying-type anodes for high performance PIBs for energy storage applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Aming Xie,Ronghui Guo,Lipeng Wu,Wei Dong
Developing an effective strategy to regulate the interfacial properties of hierarchical structure is of great significance for preparation of high-performance electromagnetic wave absorption (EMA) materials. Ion-substitution can change intrinsic structure and properties of a materials, but its effect on the interfacial properties of hierarchical structure remained to be explored. Herein, we first constructed a C@MoS 2 hierarchical structure via simple hydrothermal reaction , then used the ion-substitution strategy to replace the S atoms in MoS 2 with O, F and Se, and finally obtained anion-substituted hierarchical structure (C@X-MoS 2 , X = O, F, Se). The results show that ion-substitution destroys the MoS 2 crystal structure and realizes tunable dielectric properties of C@MoS 2 , which leads to further enhancement of overall interfacial polarization. After optimization, the absorption strength and width of C@O-MoS 2 has been significantly improved. The minimum reflection loss (RL min ) reaches −62.17 dB, and the maximum effective absorption bandwidth (EAB max ) is 7.0 GHz. The simulation results show the obtained absorbent can greatly reduce the radar cross section of target, indicating it has broad application potential. Therefore, this work provides a novel method for regulation of EMA performance of hierarchical structure and preparation of high-performance absorbents.
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Nanoscale
·
2023
·Vol. 15
·期 33
·13603-13616
·
IF 6.7
Xiling Yang,Yun Li,Peisen Zhang,Lingfei Guo,Xiaoqi Li,Yiyang Shu,Kuiyu Jiang,Yi Hou,Lihong Jing,Mingxia Jiao
Advanced nanoplatforms equipped with different functional moieties for theranostics hold appealing promise for reshaping precision medicine. The reliable construction of an individual nanomaterial with intrinsic near-infrared (NIR) photofunction and magnetic domains is much desired but largely unexplored in a direct aqueous synthesis system. Herein, we develop an aqueous phase synthetic strategy for Mn2+ doping of ZnS shell grown on Zn–Cu–In–Se core quantum dots (ZCISe@ZnS:Mn QDs), providing the optimal NIR fluorescence quantum efficiency of up to 18.9% and meanwhile efficiently introducing paramagnetic domains. The relaxometric properties of the water-soluble Mn-doped QDs make them desirable for both the longitudinal and transverse (T1 and T2) magnetic resonance (MR) contrast enhancement due to the shell lattice-doped Mn2+ ions with slow tumbling rates and favoured spin-proton dipolar interactions with surrounding water molecules. Surprisingly, the incorporation of Mn2+ ions into the shell is found to significantly enhance the production of reactive oxygen species (ROS) by combining both the chemodynamic and photodynamic processes upon NIR light irradiation, showing great potential for efficient photo-assisted ablation of cancer cells. Furthermore, a broad-spectrum excitation range beneficial for bright NIR fluorescence imaging of breast cancer has been proven and offers high flexibility in the choice of incident light sources. Multiparametric MR imaging of the brain has also been successfully demonstrated in vivo.
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SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Xia He,Yuanduo Qu,Siqi Liao,Junkai Wang,Jinling Hu,Lianfeng Duan
A WO 3 /BiVO 4 /CdS-CdSe multistage heterojunction film with a well-matched energy band was constructed to solve the bottleneck problem of photocathodic protection technology not being able to work in round-the-clock continuous operation in practical applications. The WO 3 nanoplate as optoelectronic storage was closely combined with the BiVO 4 , which demonstrated a faster electron transfer rate, to promote photoelectron separation and transfer. Meanwhile, sensitization of CdS-CdSe quantum dots could extend light absorption to the visible region. The photoelectrochemical experiment results showed that the potential of 304 stainless steel as the protected material was negatively shifted to −1.09 V (vs. Ag/AgCl), after coupling with WO 3 /BiVO 4 /CdS-CdSe in 3.5 wt% NaCl solution under simulated sunlight (AM 1.5 G). Notably, the lower potential in this system could also remain for 7 h without the sunlight to achieve round-the-clock photocathodic corrosion protection .
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xinsheng Tang,Xiong Liu,Fangfei Liu,Tursun Abdiryim,Ruxangul Jamal,Nawrzhan Serkjan,Shuyue Xie,Cong Xue,Qian Cheng
Pyro-phototronic effect plays an important role in improving the photodetection performance of ultraviolet (UV) photodetectors (PDs). Here, a novel pyro-phototronic effect between TiO 2 nanoarrays (TiO 2 NRs) and the conducting polymer poly(3,4-ethylenedioxy selenophene) (PEDOS) is applied to fabricate a self-powered UV PD with the enhanced photodetection ability. The self-powered p-n heterojunction UV PD is fabricated by a face-to-face hybrid of acid (HCl and H 2 SO 4 )-treated TiO 2 NRs with PEDOS. Interestingly, a pyro-phototronic effect is found between TiO 2 NRs/FTO and PEDOS/FTO, and the acid treatment of TiO 2 NRs can dramatically enhance the pyro-phototronic effect. H 2 SO 4 treatment can improve the p-n heterojunction, while HCl treatment can increase carrier concentration due to the introduction of surface oxygen vacancies on the surface of TiO 2 NRs. Under UV light illumination and 0 bias voltage, the rise time (T rise ) and fall time (T fall ) of UV PD from the face-to-face hybrid of PEDOS/FTO with TiO 2 (HCl)/FTO are 0.080 s and 0.079 s, while the responsivity (R) and detectivity (D*) are 58.706 mA/W and 3.627 × 10 11 Jones, respectively. The face-to-face fabrication of UV PDs and the matching of the energy levels between PEDOS and TiO 2 NRs cause the pyro-phototronic effect due to temperature change and pyroelectric effect of TiO 2 NRs under the UV light illumination. This work gives a new idea to generate pyro-phototronic effect between TiO 2 NRs and conducting polymers for application in UV PDs field.
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