Bioactive Materials
·
2023
·
IF 18.9
Yu-Jing Pan,Yang Zhang,Biao-Qi Chen,Yi Zhao,Jin-Yang Wang,Chang-Yong Li,Da-Gui Zhang,Ranjith Kumar Kankala,Shi-Bin Wang,Gang Liu,Ai-Zheng Chen
The current strategy of co-delivering copper ions and disulfiram (DSF) to generate cytotoxic CuET faces limitations in achieving rapid and substantial CuET production, specifically in tumor lesions. To overcome this challenge, we introduce a novel burst-release cascade reactor composed of phase change materials (PCMs) encapsulating ultrasmall Cu 2-x Se nanoparticles (NPs) and DSF (DSF/Cu 2-x Se@PCM). Once triggered by second near-infrared (NIR-II) light irradiation, the reactor swiftly releases Cu 2-x Se NPs and DSF, enabling catalytic reactions that lead to the rapid and massive production of Cu 2-x Se-ET complexes, thereby achieving in situ chemotherapy. The mechanism of the burst reaction is due to the unique properties of ultrasmall Cu 2-x Se NPs, including their small size, multiple defects, and high surface activity. These characteristics allow DSF to be directly reduced and chelated on the surface defect sites of Cu 2-x Se, forming Cu 2-x Se-ET complexes without the need for copper ion release. Additionally, Cu 2-x Se-ET has demonstrated a similar (to CuET) anti-tumor activity through increased autophagy, but with even greater potency due to its unique two-dimensional-like structure. The light-triggered cascade of interlocking reactions, coupled with in situ explosive generation of tumor-suppressive substances mediated by the size and valence of Cu 2-x Se, presents a promising approach for the development of innovative nanoplatforms in the field of precise tumor chemotherapy.
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Small Science
·
2023
·Vol. 3
·期 12
·2300134
·
IF 12.7
Xiaomeng Shi,Zhichao Zeng,Yongqing Wen,Hongtu Zhang,Yabin Zhang,Yaping Du
All-solid-state lithium batteries (ASSLBs) are a research hotspot for their superior safety. The solid electrolytes (SEs) are key components in ASSLBs, and the emerging rare-earth halide SEs (RE-HSEs) are valued for their comprehensive performances of good ionic conductivity, electrochemical stability, and deformability. In addition, cathode materials can influence the properties of ASSLBs, and sulfur (S) attracts much attention due to the lower toxicity and much higher energy density compared with commercial oxide cathodes. However, the S possesses poor electronic conductivity, which can be improved by the introduction of selenium (Se) with much higher electronic conductivity. In this work, a series of Se x S 1– x composites is synthesized by a melting method. Due to the introduction of Se and the enriched defects from the melting process, the electronic and ionic conductivities of Se x S 1– x are improved. After application in ASSLBs based on RE-HSE Li 3 YBr 6 , the Se x S 1– x materials exhibit good performances with low polarizations, good cycling stabilities, and excellent rate properties at room temperature. Moreover, the assembled solid batteries can realize stable cycling performance (100 cycles) at low temperature (−30 °C) and a normal discharge–charge process at high temperature (120 °C).
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Kuidong Wang,Jiaxing Zhang,Aixiang Wei,Jun Liu,Yuding He,Zhen Liu,Jiaxiong Xu
Developing catalysts with long term stability at large current densities for oxygen evolution reaction (OER) remains a major challenge. Herein, the NiFeSe arrays were synthesized on the commercial nickel-iron foams (NFF) substrate using a one-step hydrothermal method by changing the hydrazine hydrate to solvent volume ratio in the precursors and reaction temperature. The NiFeSe/NFF catalyst prepared at the hydrazine hydrate to solvent volume ratio of 1:4 and reaction temperature of 160 °C shows the optimal OER electrocatalytic performance with a low overpotential of 245, 259 and 269 mV at the current density of 100, 200 and 300 mA cm −2 , small Tafel slope of 44.7 mVdec −1 and large electrochemical surface area (ECSA) of 600 cm 2 in 1 M KOH solution. Importantly, the OER activities of the NiFeSe/NFF catalyst exhibit enhancement during long-term stability test at a bias of 1.04 V (vs. Hg/HgO) for 327 h. During long-term continuous OER electrochemical process , the formation of NiFeOOH/NiFeSe heterojunction resulting from the surface reconstruction are responsible for enhancing OER activities by modulating the electron structure of interface and increasing the adsorption ability of intermediate *OH and *OOH on the surface of NiFeOOH. Our work provides new idea to design and construct heterostucture catalyst via the in-situ surface reconstruction.
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OPTICS EXPRESS
·
2023
·Vol. 31
·期 25
·42400-42412
·
IF 3.8
Yajun Lou,Boyuan Ge,Yue Cai,Xinhai Zhang
Passive mode-locking based on saturable absorbers (SAs) is an effective way to generate ultrafast pulses, while the spatiotemporal mode-locking (STML) based on SAs are rarely studied. We construct an all-fiber laser with InP quantum dots (QDs) SA, and realize multi-mode Q-switching (MMQS) and STML. In addition, by adjusting the polarization controller (PC) in the laser cavity, we obtain two different single-pulse STML states. The narrowest pulse widths of the two states are 57 ps and 32 ps, respectively, and the pulse width can be tuned continuously with increasing the pump power. By decoupling the effects of the PC and the SA in our experiment, we find that the polarization plays a key role in the selection of transverse modes. The effect of independent polarization on spatiotemporal mode-locked pulses has not been investigated before. To further analyze and understand the experimental results, we numerically solve the nonlinear Schrodinger equation, and compare the numerical simulation with the experimental results. In addition to passively adjusting cavity loss, the InP QD SA can balance the large walk off between different transverse modes, due to the spatial and spectral filtering effects. Our work has important implications for the design and application of all-fiber STML lasers.
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Nano Research
·
2023
·
IF 9.9
Zhu Yuhang,Liu Tingting,Li Lin,Cao Maosheng
Currently, as the electromagnetic (EM) environment becomes increasingly complex, single-function EM materials can hardly resist the increasing electromagnetic interference (EMI), and there is an urgent need to develop multifunctional EM materials. In this work, multifunctional WSe 2 /Co 3 C was prepared by simple hydrothermal methods. Its dielectric performance and EM response were investigated. Efficient absorption, shielding performance, and energy conversion devices were customized. By tailoring the loading content, WSe 2 /Co 3 C can switch between EM absorption and EMI shielding. The maximum shielding effectiveness (SE) of WSe 2 /Co 3 C reached 36 dB, and high reflection loss (RL) of −60.28 dB and wide effective absorption bandwidth (EAB) of 6.16 GHz can be obtained at low thickness. The multiple EM attenuation mechanisms brought by the combination of two-dimensional (2D) WSe 2 and magnetic Co 3 C are considered to be the main reason for the enhanced EM attenuation ability. The WSe 2 /Co 3 C composite provides a viable candidate for developing multifunctional EM materials in 2–18 GHz.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Jiajia Yang,Xiaodan Zhang,Yuming Huang
Convenient and reliable tetracycline hydrochloride (TC) detection is necessary due to its harmfulness. Herein, Se-doped ZnMn 2 O 4 /nitrogen carbon (NC) catalyst was effectively synthesized through step-by-step calcination in an N 2 atmosphere, which possessed enhanced oxidase mimetic activity. After Se doping, the oxidase-like activity of the catalyst is 2.75-fold and 1.64-fold higher than that of the Zn-Mn ZIF precursor and ZnO/MnO/NC, respectively. The Michaelis–Menten constant for Se-doped ZnMn 2 O 4 /NC with TMB substrate is 0.047 mM, which has higher affinity towards TMB than other manganese-containing materials. More oxygen vacancy in Se-doped ZnMn 2 O 4 /NC was recognized as the main sites for activating oxygen to produce reactive oxygen species to oxidize TMB. Based on the inhibitory effect of TC on the colorimetric system of TMB/Se-doped ZnMn 2 O 4 /NC, a simple method for TC detection was proposed with a wide linear range of 2–100 µM and 100–500 µM and a low detection limit of 0.88 µM. The method exhibited good selectivity to TC among some ions and antibiotics, and TC in the practical water samples was successfully detected.
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Materials
·
2023
·Vol. 16
·期 21
·7007
·
IF 3.4
Yuzhe Wang,Yueqi Zhong,Jiangzhi Zi,Zichao Lian
Conventional single-component quantum dots (QDs) suffer from low recombination rates of photogenerated electrons and holes, which hinders their ability to meet the requirements for LED and laser applications. Therefore, it is urgent to design multicomponent heterojunction nanocrystals with these properties. Herein, we used CdSe quantum dot nanocrystals as a typical model, which were synthesized by means of a colloidal chemistry method at high temperatures. Then, CdS with a wide band gap was used to encapsulate the CdSe QDs, forming a CdSe@CdS core@shell heterojunction. Finally, the CdSe@CdS core@shell was modified through the growth of the ZnS shell to obtain CdSe@CdS@ZnS heterojunction nanocrystal hybrids. The morphologies, phases, structures and performance characteristics of CdSe@CdS@ZnS were evaluated using various analytical techniques, including transmission electron microscopy, X-ray diffraction, UV-vis absorption spectroscopy, fluorescence spectroscopy and time-resolved transient photoluminescence spectroscopy. The results show that the energy band structure is transformed from type II to type I after the ZnS growth. The photoluminescence lifetime increases from 41.4 ns to 88.8 ns and the photoluminescence quantum efficiency reaches 17.05% compared with that of pristine CdSe QDs. This paper provides a fundamental study and a new route for studying light-emitting devices and biological imaging based on multicomponent QDs.
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Catalysis Science & Technology
·
2023
·Vol. 13
·期 24
·7046-7058
·
IF 5
Wei Jin,Dekang Liu,Liyuan Zhang,Qian Sun,Yishan Wang,Enzhou Liu,Xiaoyun Hu,Hui Miao
Titanium dioxide (TiO2), a conventional n-type semiconductor, was widely used in photocatalysis, electrocatalysis and photoelectrocatalysis due to its good UV absorption and stable physical and chemical properties. However, its wide band gap and low oxygen reaction (OER) activity limited its application in photoelectrochemical (PEC) water splitting. In this work, we successfully constructed type-II Sb2(S,Se)3@TiO2 core–shell heterojunctions. Antimony sulfide selenide (Sb2(S,Se)3) was a quasi-one-dimensional light-absorbing material with an adjustable band gap (1.1–1.8 eV), which broadened the TiO2 light absorption range and effectively promoted the photogenerated carrier separation, transportation and utilization. Of particular note, novel Sb2(S,Se)3 nanospheres (NSPs) (ca. 69 nm) were in situ grown inside the tubes attributed to the unique space-confinement effect of TiO2 nanotubes (NTs). The IPCE value for Sb2(S,Se)3@TiO2 at 734 nm was 10.808% compared to 0.030% for TiO2. The separation efficiency and injection efficiency increased from 2.48% and 31.62% to 4.90% and 36.48%, respectively. The onset potential was moved negatively by 60 mV, and the maximum photocurrent density of 1.53 mA cm−2 at 1.23 V vs. RHE was 13.9 times higher than that of TiO2 (0.11 mA cm−2). This work provided a new idea for the application of TiO2 in the field of PEC water splitting.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liang Li,Shao-zhong Hu,Ting Huang,Nan Zhang,Yong Wang
Constructing heterogeneous catalyst with different bandgaps is a prospect way to realize efficient charge transfer of catalytic redox reaction. Semiconductor-based catalyst as a prospective material can effectively solve sewage issues under light irradiation, but the efficiency is greatly influenced by the recombination rate of photoelectrons and holes. In this work, cerium dioxide (CeO 2 ) nanoparticles (NPs) were grown in-situ on carbon nanotubes (CNTs), which can maintain the pollutant removal efficiency of pure CeO 2 NPs and enhance the adsorption intensity under visible light for CeO 2 @CNTs composite. Furthermore, the introduction of cadmium selenide (CdSe) was conducive to establish built-in electronic field in the ternary CeO 2 @CNTs/CdSe catalyst, which effectively enhanced the catalytic activity of CeO 2 @CNTs/CdSe. In comparison to CNTs, CdSe, CeO 2 and CeO 2 @CNTs composite, the ternary CeO 2 @CNTs/CdSe catalyst exhibited higher photocurrent intensity, lower recombination of photoelectrons and holes (e - /h + ) pairs, indicating much better photocatalytic activity. CeO 2 @CNTs/CdSe as photocatalyst displayed excellent adsorption ability for Congo red (CR), which contributed to increase the transparency of reaction solution and improve the utilization rate to light, the evaluated degradation efficiency of CR achieved 83.58 % and the reduction ratio of Cr(VI) was nearly 100 %. This work confirms that CeO 2 @CNTs/CdSe composite with excellent adsorption and photocatalytic ability is a promising photocatalyst material in wastewater treatment.
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Small
·
2023
·
IF 13.3
Tianze Jiang,Bingjie Wang,Teng Wang,Lianxiao Zhang,Xiangyan Chen,Xia Zhao
Immunotherapy is regarded as a prospective strategy against metastatic cancer. However, tumor-associated macrophages (TAMs), which accumulate in hypoxic tumor microenvironment, reduce the effectiveness of immunotherapy by blocking or “hijacking” the initiation of the immune response. Here, a novel tumor-targeted nanoplatform loaded with hypoxia-pathway-intervened docosahexaenoic acid (DHA) and chemotherapeutic drug carfilzomib (CFZ) is developed, which realizes the rescue of TAM-hijacked immune response and effective metastatic cancer immunotherapy. DHA is conjugated to fucoidan (Fuc) via a reduction cleavable selenylsulfide bond (SSe) for micelle preparation, and CFZ is encapsulated in the hydrophobic cores of micelles. The functionalized nanoplatforms (Fuc─SSe─DHA (FSSeD)–CFZs) induce immunogenic cell death, inhibit hypoxia-inducible factor-1α expression, and improve immunosuppression by TAM suppression. FSSeD–CFZs enhance immune response against primary tumor development and metastasis formation. In brief, the novel rescue strategy for TAM-hijacked immunoreaction by inhibiting hypoxia pathway has the potential and clinically translational significance for enhanced metastatic cancer immunotherapy.
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JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Qian Sun,Xiaomin Cheng,Cheng Ma,Jitong Wang,Wenming Qiao,Licheng Ling
Lithium-sulfur (Li–S) batteries are considered as the most promising successors of lithium-ion batteries, however, the shuttle effect and sluggish reaction kinetics are the biggest obstacles hindering their commercialization . In this work, a kind of NiSe nanoparticles embedded in corn stalk-derived two-dimensional (2D) porous carbon nanosheet (NiSe@CSC) is constructed as a separator modifier for advanced Li–S batteries. The rich pore structure of the corn stalk-derived carbon nanosheets enables uniform distribution of NiSe and provides more deposition sites for lithium polysulfides (LiPS). Electrochemical analyses show that NiSe increases the affinity for LiPS to suppress the shuttle effect, thereby effectively preventing the corrosion of polysulfide on the lithium anode. NiSe@CSC is found to accelerate the redox conversion of sulfur species in the kinetic study . Consequently, the assembled Li–S cells with NiSe@CSC coating layer exhibit a high-rate performance of 710 mAh g −1 at 3 C and a low capacity attenuation rate of 0.046% per cycle after 800 cycles at 1 C. Furthermore, it can still maintain 2.8 mAh cm −2 at 0.5 C in near-commercial application scenarios of 4.1 mg cm −2 sulfur loading. The NiSe@CSC-based Li–Li symmetric cells also demonstrate stability and low overpotential in protecting the lithium anode. This combination of renewable biomass-based carbons and transition metal selenides enriches the exploration of biomass materials in separators and provides new ideas for designing practical Li–S batteries.
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Small
·
2023
·
IF 13.3
Zhuanxia Li,Lianghao Yu,Xin Tao,Yun Li,Linlin Zhang,Xuedong He,Yan Chen,Sha Xiong,Wei Hu,Jun Li,Jichang Wang,Huile Jin,Shun Wang
Sodium-ion batteries are a promising substitute for lithium batteries due to the abundant resources and low cost of sodium. Herein, honeycomb-shaped MoSe 2 /reduced graphene oxide (rGO) composite materials are synthesized from graphene oxide (GO) and MoSe 2 through a one-step solvothermal process. Experiments show that the 3D honeycomb structure provides excellent electrolyte penetration while alleviating the volume change during electrochemical cycling. An anode prepared with MoSe 2 /rGO composites exhibits significantly improved sodium-ion storage properties, where a large reversible capacity of 215 mAh g −1 is obtained after 2700 cycles at the current density of 30.0 A g −1 or after 5900 cycles at 8.0 A g −1 . When such an anode is paired with Na 3 V 2 (PO 4 ) 3 to form a full cell, a reversible specific capacity of 107.5 mAh g −1 can be retained after 1000 cycles at the current of 1.0 A g −1 . Transmission electron microscopy, X-ray photoelectron spectroscopy and in situ X-ray diffraction (XRD) characterization reveal the reversible storage reaction of Na ions in the MoSe 2 /rGO composites. The significantly enhanced sodium storage capacity is attributed to the unique honeycomb microstructure and the use of ether-based electrolytes. This study illustrates that combining rGO with ether-based electrolytes has tremendous potential in constructing high-performance sodium-ion batteries.
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