Science Advances
·
2023
·Vol. 9
·期 28
·
IF 13.6
Tianling Qin,Ge Mu,Pengfei Zhao,Yimei Tan,Yanfei Liu,Shuo Zhang,Yuning Luo,Qun Hao,Menglu Chen,Xin Tang
Colloidal quantum dot (CQD)–based photodetectors are promising alternatives to bulk semiconductor-based detectors to be monolithically integrated with complementary metal-oxide semiconductor readout integrated circuits avoiding high-cost epitaxial growth methods and complicated flip-bonding processes. To date, photovoltaic (PV) single-pixel detectors have led to the best performance with background-limit infrared photodetection performance. However, the nonuniform and uncontrollable doping methods and complex device configuration restrict the focal plane array (FPA) imagers to operate in PV mode. Here, we propose a controllable in situ electric field–activated doping method to construct lateral p-n junctions in the short-wave infrared (SWIR) mercury telluride (HgTe) CQD–based photodetectors with a simple planar configuration. The planar p-n junction FPA imagers with 640 × 512 pixels (15-μm pixel pitch) are fabricated and exhibit substantially improved performance compared with photoconductor imagers before activation. High-resolution SWIR infrared imaging is demonstrated with great potential for various applications including semiconductor inspection, food safety, and chemical analysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Qian Zhao,Lei Liu,Ying Du,Sisi Jiang,Tingshun Jiang
Rational design of non-noble metal electrocatalyst with high stability and activity for OER is desirable for the production of renewable energy to solve the environmental crisis. Starting from Prussian blue analogues (PBAs) with special advantages, the trimetallic hollow structural Co-Fe-P/Cu 3 P/CF covered with extended nanosheets grown on nanorods was synthesized via ion exchange and calcination approaches in this study. The overpotential of the prepared electrode was only 205 mV at a current density of 100 mA cm − 2 , and it can maintain the stable catalytic activity for at least 60 h. The prominent electric performance is mainly attributed to the construction of the unique morphology, in which the rod-shaped structure can promote the transportation of the reactants, and the hollow structure as well as the nanosheets outside can expand the specific surface area. The electronic interaction between multiple metals can also improve the conductivity of the catalyst. The characterization analysis of the post electrode after long-term oxygen evolution reaction imply that the surface of the catalytic electrode was partially oxidized to the corresponding oxide, which can generate the new active sites to maintain the high catalytic activity together with the residual phosphide. Our research might provide a new reference for the deep exploration of PBA-based materials applied in electrochemical energy conversion and storage.
✓ 已验证
产品关联
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2023
·
IF 2.8
Meifeng Chen,Tingting Xiao,Yuanfei Huang,Xiaosong Zhou,Jin Luo,Xunfu Zhou,Yuanyuan Ge
Research on the subject of photolysis focuses on the creation of effective non-precious metal co-catalysts. Graphitic carbon nitride (g-C 3 N 4 ) is a promising candidate for photocatalytic hydrogen generation from water. But its photocatalytic activity is limited by the slow redox reaction, high carrier recombination rate, and inadequate optical absorption. Incorporating in situ loading Ni 2 P/Cu 3 P and phosphorus doping on g-C 3 N 4 is effective in overcoming the drawbacks. Phosphorus doping reduces the band gap of g-C 3 N 4 for increased light absorption and improves the separation of photogenerated charge. Additionally, Ni 2 P/Cu 3 P heterojunctions anchored on P-doped g-C 3 N 4 (P-C 3 N 4 ) as non-noble co-catalysts boost light adsorption, enabling charge transfer and speeding the hydrogen evolution process. The resultant Ni 2 P/Cu 3 P@P-C 3 N 4 composite photocatalyst achieves an effective photocatalytic hydrogen evolution rate of 201 times greater than that of g-C 3 N 4 (12.9 μmol·h −1 ·g −1 ). This work is instructive to develop efficient g-C 3 N 4 -based photocatalysts for photocatalytic water splitting without the need for noble metals.
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2023
·
IF 12.9
Yuxue Yue,Saisai Wang,Qi Zhou,Bolin Wang,Chunxiao Jin,Renqin Chang,Liqi Wan,Zhiyan Pan,Yihan Zhu,Jia Zhao,Xiaonian Li
It remains challenging to achieve nanoparticles with uniform size and dispersion or single atoms with identical coordination structure, although various methods have been developed to synthesize carbon-supported nanostructured catalysts. Typically, in the synthesis of vinyl chloride (VCM) by acetylene hydrochlorination, a limited understanding of the optimal architecture for carbon-supported Cu catalysts at the nanoscale greatly restrains their further development and application. To achieve this, Cu single-atom (Cu-O3P) with identical coordination environments and Cu/Cu3P nanoparticles with uniform size were tailored via advanced carbothermal shock method, and their catalytic structure–activity relationships were explored in the acetylene hydrochlorination reaction. In detail, a platform of nanostructured copper catalysts was constructed by the precursor-assisted carbothermal shock method, and the relationship between the coupling structure and electron properties of copper sites and their catalytic performance is correlated. Finally, we derived quantitative activity and stability descriptors that account for the d-orbital coupling and competitive adsorption effects observed in acetylene hydrochlorination. This work provides a precise and versatile approach for designing well-defined carbon-supported metal nanocatalysts and regulating their catalytic performance.
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 11
·115502
·
IF 2.025
Jiajun Miao,Yafei Zhang,Liang Yue,Xianqiang Ran,Mingzhao Cheng,Zhenzi Jing
To develop a new technology to remediate pollution sites stably and effectively, hydrothermal conversion of polluted soil (model soil) into zeolite P for in situ immobilization of Heavy Metals (HM) was carried out. Zeolite P could be synthesized from soil hydrothermally with a large range of Al/Si ratio (0.33–1.0) in 48 h at 200 °C. With immobilizing heavy metals (Cr, Zn and Cd), the crystallization of Zeolite P (Cr-ZP, Zn-ZP and Cd-ZP) was delayed with the order of Cr >Zn >Cd because the stronger the ligand effect of heavy metals have, the more heavily the nucleation and growth were influenced. During immobilization via zeolitization, a self-adaptive structuring behavior was confirmed by EDAX, BET and Rietveld refinement analyses: zeolite P structured more [AlO4]− to immobilize HM because the flexible 8-member-Ring channels (8 mRs) with higher Al/Si ratio could complex with more HM readily. The encapsulated HM occupied the original Na positions (Na1 and Na2) of zeolite P competitively because of their different cation size, e.g., the smallest Cr3+ could substitute all Na1 because Na1 is closer to the Framework Oxygen (FO); the largest Cd2+, however, substituted Na1 (9%) and Na2 (14%) evenly. The shrunken 8 mRs due to heavy metal immobilization also caused different chemical environments for different heavy metals immobilized because the smaller heavy metal cation could get closer to the framework, and also coordinated with more FO.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Shuang Liu,Limin Ma,Cheng Zhen,Yishu Wang,Dan Li,Fu Guo
Crystalline and amorphous cobalt-phosphorus (Co-P) coatings have their own advantages in interfacial diffusion resistance and mechanical ductility of solder joints, respectively, but it cannot be better at both. In this work, the hybrid crystalline-amorphous Co-P coating (Co-9.1 at.% P) was fabricated and applied on the Cu/Sn interface by controlling the crystallinity through compositional design. Combining the advantages of crystalline and amorphous Co-P, strategies for solder joints with high shear strength, ductile intermetallic compounds (IMCs) and slow interface consumption was proposed. The evolution, microstructure, phase, and mechanical properties of the Co-Sn, Co-Sn-P and P-rich layers in solid-state diffusion were systematically characterized and tested by means of SEM, EPMA, EBSD, TEM, nanoindentation, and shear test. It was found that the hybrid Co-P coating achieved a low consumption rate, 14.2 nm/h, attributing to the partially crystalline structure and the Co-Sn-P exfoliation behavior. In addition, solder joints containing large-thickness ductile Co-Sn IMCs, 3.2–3.6 GPa of hardness, was established. The shear strength after aging reached 75.4 MPa relying on the large thickness of Co-Sn IMCs. Severe mechanical loads would be able to be withstand by virtue of the plastic deformation of ductile IMCs. Hybrid crystalline-amorphous Co-P would be a promising interface material in microelectronic packaging.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Hongcan Sun,Shuhong Xu,Zengwei Chen,Fan Liu,Shenfei Zong,Zhuyuan Wang,Chunlei Wang
Narrow band gap emissive carbon dots (CDs), especially those with full width at half maximum (FWHM) below 40 nm, is extremely important for biological imaging application due to higher color purity and better resolution. The synthesis of narrow FWHM emissive CDs usually requires the use of specific-structured molecular precursors with a large π conjugated domain. In comparison, the most common precursors for CDs, for instance p-phenylenediamine, are usually believed unsuitable for preparing CDs with FWHM emission below 40 nm. In this work, we challenged this stereotype by using p-phenylenediamine precursor to synthesize CDs with a small FWHM of only 29 nm. Instead of using traditional solvothermal method, a facile solvent-free method was developed to synthesize CDs with the powder of p-phenylenediamine in the autoclave under a reaction temperature of 200 °C. After dispersed in solution, CDs show a red emission around 615 nm with FWHM of 29 nm and a photoluminescence quantum yield (PLQY) of 12.8%. Through experiments and theoretical calculation, we found that the FWHM emission is positive correlated to the content of amino groups on the surface of CDs. In comparison to traditional solvothermal method, the current solvent-free method can promote the synthesis of CDs with less amino groups on the surface, reducing fluorescence center types, and hence realizing smaller FWHM emission. In addition, as-prepared CDs were used for biological imaging, and realized a rapid no-wash cell imaging.
✓ 已验证
产品关联
DOI
高影响因子
Asian Journal of Pharmaceutical Sciences
·
2022
·
IF 9.273
Gaofeng Shu,Lin Shen,Jiayi Ding,Junchao Yu,Xiaoxiao Chen,Xiaoju Guo,Enqi Qiao,Yaning Chen,Chenying Lu,Zhongwei Zhao,Yongzhong Du,Minjiang Chen,Jiansong Ji
The development of novel theranostic agents with outstanding diagnostic and therapeutic performances is still strongly desired in the treatment of hepatocellular carcinoma (HCC). Here, a fucoidan-modified mesoporous polydopamine nanoparticle dual-loaded with gadolinium iron and doxorubicin (FMPDA/Gd 3+ /DOX) was prepared as an effective theranostic agent for magnetic resonance imaging (MRI)-guided chemo-photothermal therapy of HCC. It was found that FMPDA/Gd 3+ /DOX had a high photothermal conversion efficiency of 33.4% and excellent T 1 −MRI performance with a longitudinal relaxivity (r 1 ) value of 14.966 mM −1 · s − 1 . Moreover, the results suggested that FMPDA/Gd 3+ /DOX could effectively accumulate into the tumor foci by dual-targeting the tumor-infiltrated platelets and HCC cells, which resulted from the specific interaction between fucoidan and overexpressed p-selectin receptors. The excellent tumor-homing ability and MRI-guided chemo-photothermal therapy therefore endowed FMPDA/Gd 3+ /DOX with a strongest ability to inhibit tumor growth than the respective single treatment modality. Overall, our study demonstrated that FMPDA/Gd 3+ /DOX could be applied as a potential nanoplatform for safe and effective cancer theranostics
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2022
·Vol. 12
·期 9
·957
·
IF 4.501
Ji Chen,Shuwen Zhao,Yifan Zhao,Weijie Zhou,Ruijie Dai,Xuan Zhao,Zhengang Chen,Hua Zhang,Anran Chen
Hydrogen is the mainstream future energy source because of its high energy density and environmentally-friendly properties. In this study, Fe-Co2P/NPC materials were prepared by the wet chemical synthesis method, in which Fe-Co2P nanowires were wrapped by the N, P co-doped carbon layers (NPC) under aging and phosphorylation strategies. When Fe-Co2P/NPC/NF was subjected to hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), the overpotential was only 73 mV and 217 mV to reach the current density of 10 mA cm−2, respectively. When the cathode and anode were both Fe-Co2P/NPC/NF, a current density of 10 mA cm−2was achieved with only 1.56 V. This work provides a new idea for the design and preparation of non-precious metal-based transition metal phosphide catalysts.Keywords:transition metal phosphide;water splitting;hydrogen evolution;oxygen evolution;N, P co-doped carbon
✓ 已验证
产品关联
DOI
高影响因子
Science China-Chemistry
·
2022
·Vol. 65
·期 9
·1829-1837
·
IF 10.138
Shi Yue,Zhang Dan,Miao Hongfu,Wu Xueke,Wang Zuochao,Zhan Tianrong,Lai Jianping,Wang Lei
Molybdenum disulfide (MoS 2 ) has become a competitive candidate for efficient and economical hydrogen evolution reaction (HER). Compared with 1T-MoS 2 , 2H-MoS 2 possesses exceptional thermodynamic stability but still suffers from low active site density, poor conductivity, and weak hydrogen bonding in the wide pH range. Herein, 2H-MoS 2 nanoflowers with phosphorus doping, sulfur vacancies and crystalline-amorphous heterojunction were synthesized via phosphorus-assisted rapid calcination method. Benefiting from the cooperative interaction of multiple strategies, the prepared 2H-MoS 2 nanoflowers firstly achieve efficient pH-universal HER at high current densities. Experimental results show that in alkaline, acidic, and neutral media, MoS 2 -P2 requires only 332, 302, and 417 mV to drive the current density of 500 mA cm −2 and obtains 932, 1100, and 472 mA cm −2 at the potential of −0.4 V vs. RHE, respectively. Moreover, MoS 2 -P2 shows excellent stability of low and high current density in the full pH range.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Dairui Xie,Hao Huang,Heng Zhang,Fang Shen,Meng Jiang,Xiaoting Li,Hongyan Shang,Jun Ma,Shilin Zhao
The amphiphilic humic acid ester ether (HAEE), as a kind of solid-phase extractant with characteristics of easy separation and hydrophilic–hydrophobic amphiphilic property, was prepared and used to extract micro or trace nitrofen, 2,4-dichlorophenol and p-nitrotrophenol (NIPs) from water and soil. Degradation of NIPs and extractant regeneration were carried out by simple photocatalysis. The adsorption equilibrium of the mono- or three mixed NIPs by HAEE in aqueous could be quickly reached within 20 min. The adsorption process was fit to quasi-second-order kinetics model and Friendlich thermodynamics model. The possible adsorption interaction was discussed. Results suggested that the adsorption of NIPs onto HAEE predominated by hydrogen bonding, hydrophobic interaction and π-π interaction. The extraction capacity of mixed NIPs (80 μg/L each component) by HAEE was up to 0.38 mg/g and tended to be multi-layer adsorption, in which p-nitrotrophenol had higher adsorption competitiveness because of lower resistance to HAEE. When HAEE-NIPs were degraded by photo-catalyst Fe0/F-TiO2 for 8 h, not only the adsorbed NIPs could be totally degraded and mineralized, but also the HAEE could be effectively regenerated. When the NIPs were continuously extracted from 40-year aging soil for three times (regenerative twice) by combined extractant (48 mL H2O + 2 mL n-hexane + 0.1 g HAEE), the total extraction efficiency of NIPs could reach to 84.66%. This research could supplement the theory and technique for harmless treatment of NIPs contaminated water and soil.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 19
·4458-4469
·
IF 6.813
Chengming Wu,Zhao Yang,Jifan Li,Chun-Ling Liu,Wen-Sheng Dong
A series of alkali metals (K, Rb, and Cs) doped phosphotungstic acid (H3PW12O40, HPW) catalysts were prepared by an ion-exchange method. These catalysts were characterized by various techniques and applied for the renewable production of p-xylene (PX) from biomass-derived 2,5-dimethylfuran (DMF) and ethylene. The effects of the types and amounts of the alkali metals on the catalytic activity of these catalysts were evaluated, and the relationship between the catalytic activity and acidity was established. Among these catalysts, the Cs1H2PW exhibited the best activity and PX yield. The influences of the reaction conditions i.e. the ethylene pressure, catalyst dosage, reaction temperature, and reaction time were investigated. Under the optimum reaction conditions, a high DMF conversion of 91.8% along with PX yield of 64.0% was obtained over Cs1H2PW. Also, the Cs1H2PW catalyst could be re-used at least five times with slight losses in activity. Moreover, the kinetics of the conversion of DMF to PX over Cs1H2PW was studied using a pseudo-first-order kinetic model, and a lower activation energy (57.9 KJ mol−1) was obtained.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）