Biosensors-Basel
·
2024
·Vol. 14
·期 12
·586
·
IF 4.9
Xiaowei Fan,Guping Zhang,Xiaodi Li,Yao Wang,Yi Wang,Shilei Hao,Defang Liu
In this study, we have proposed an electrochemiluminescence (ECL) signal amplification system which is based on two-dimensional (2D) flower-like CdS@Co/Mo-MOF composites as a co-reaction accelerator of the g-C3N4/S2O82−system for ultrasensitive detection of chlorpromazine hydrochloride (CPH). Specifically, the 2D flower-like Co/Mo-MOF with mesoporous alleviated the aggregation of CdS NPs while simultaneously fostering reactant-active site contact and improving the reactant–product transport rate. This allowed the material to act as a novel co-reaction accelerator, speeding up the transformation of the S2O82−into SO4•−and enhancing the cathodic ECL emission of g-C3N4. Moreover, the signal probe which was synthesized by coupling the 2D CdS@Co/Mo-MOF and graphitic carbon nitride (g-C3N4) achieved the generation of SO4•−in situ and reduced energy loss. The results confirmed that the ECL signal was enhanced 6.2-fold and stabilized by CdS@Co/Mo-MOF. Based on the extremely strong quenching effect of chlorpromazine hydrochloride (CPH) on this system, a “signal-off” type sensor was constructed. The sensor demonstrated excellent sensitivity and linear response to CPH concentrations ranging from 1 pmol L−1to 100 μmol L−1, with a low detection limit of 0.4 pmol L−1(S/N = 3).
研究领域:
材料科学
·
分析化学
·
医学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Sainan Liu,Hongtai Shen,Jiawei Xu,Xiaojun Zhou,Jianfei Liu,Zhenyang Cai,Xiaojun Zhao,Lairong Xiao
To develop an ultra-high-temperature resistant coating for a reusable thermal protection system, the preparation of a tantalum-based MoSi 2 -Mo coating by a new two-step process of multi-arc ion plating and halide activated pack cementation is presented. The coating has a dense structure and is well compatible with the tantalum substrate, which can be thermally shocked from room temperature to 1750 °C for 360 cycles without failure. The mechanism of the coating’s excellent resistance to high-temperature thermal shocks is that a strong-binding gradient interface and a dense SiO 2 oxide scale with good oxygen resistance are formed by the high-temperature self-diffusion of Si.
研究领域:
材料科学
·
高温防护技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 20
·9887-9893
·
IF 3.3
Yao Tang,Zijun Zou,Xingen Wu,Pengfei Zuo,Lei Wang,Guiwen Huang,Jia Zhu,Shengliang Zhong
Designing highly efficient non-precious metal electrocatalysts to facilitate overall water decomposition is critical and highly desirable, but still challenging. In this study, we synthesized ZIF-67@POM nanomaterials by doping H3PMo12O40 in ZIF-67. The molybdenum-doped carbon matrix can effectively reduce CoP agglomeration, which is conducive to improving the specific surface area and active sites of the catalyst. The doping of Mo also optimizes the electronic structure of Mo-CoP-100 and improves its electrocatalytic activity. Compared with CoP derived from pristine ZIF-67, the optimal Mo-CoP-100 exhibits significantly enhanced oxygen evolution reaction (OER) catalytic activity with an almost constant overpotential of 290 mV to maintain a stable current density of 10 mA cm−2 in alkaline media for at least 100 h. Furthermore, compared with traditional precious metal-free OER electrocatalysts, the Mo-CoP catalysts prepared in this work have high specific surface area, rich surface-active sites, good cycling stability and high diffusion efficiency.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Liyong Du,Heming Sun,Yi Liu
Metal-organic frameworks (MOFs) derived oxide semiconductors have drawn more and more attention in many fields due to their unique structural merits. Herein, hierarchical flower-like Mo-doped Co 3 O 4 derived Co-MOF has been synthesized through a solvothermal method and following annealing process. The gas sensing measurements show that the sensing properties of Mo-doped Co 3 O 4 sample are far superior than that of pure Co 3 O 4 . In particular, 1 at% Mo-doped Co 3 O 4 sample exhibits high response values of 92–50 ppm TEA at 180 °C, which are about 46 times than that of pure Co 3 O 4 sample. In addition, it shows short recovery time (33 s), excellent gas selectivity, good repeatability and long-term stability. The improved gas sensing performance can be ascribed to Mo doping and hierarchical flower-like microstructure.
研究领域:
材料科学
·
化学工程
·
传感器技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Luyang Zuo,Rui Li,Qi Liu,Yabing Duan,Hongwei Wang,Huitao Fan,Bo Li,Liya Wang
Solar energy-assisted hydrogen production technology is an essential tool for exploring hydrogen energy. To date, semiconductors have been used as the primary photocatalyst to generate hydrogen via photocatalytic water splitting. However, the high photogenerated electron–hole recombination rate of semiconductor photocatalysts results in a low hydrogen production rate. Herein, the synergistic effect of Mo-ion doping and the incorporation of Ni-based Hofmann-type coordination polymer (Ni–Ni HCP) on the photocatalytic performance of ZnIn 2 S 4 (ZIS) is investigated. The hydrogen production rate of the prepared in-situ Mo doped ZnIn 2 S 4 wrapped Ni-Ni HCP (Ni–Ni HCP/Mo–ZIS) sample under visible-light irradiation is 26.7 mmol g −1 h −1 , which is 10 times that of pure ZIS. Hydrogen production rate test, microscopic characterization, and density functional theory calculation confirm that the proposed dual modulation approach (combined ion doping and heterogeneous structure construction) could effectively increase the photocatalytic efficiency of ZIS. The stability of prepared samples is also examined by four-cycle photocatalytic hydrogen production tests. The proposed integrated method opens a new route for advancing renewable energy technology towards a sustainable future.
研究领域:
材料科学
·
可再生能源
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Guonan Cui,Yanchun Yang,Lulu Bai,Rui Wang,Zhihui Gong,Yongjun Cao,Shuyu Li,Xiaogong Lv,Chengjun Zhu
A suitable interlayer between the Mo back electrode and kesterite absorber layer has been proven to have a positive effect on limiting the bulk defects of the absorber by the constitute diffusion. Here, a thin Bi 2 S 3 layer is used as the back-interface intermediate layer for the first time, this innovative approach allows for simultaneous modification of the back contact and reduction of bulk defects, resulting in improving the power conversion efficiency of the kesterite device from 9.66% to 11.8%. The evaporated Bi 2 O 3 thin films turn into the Bi 2 S 3 interlayers after sintering the Cu 2 ZnSnS 4 precursor thin films. The Bi 2 S 3 interlayer can inhibit the decomposition reaction of back contact and suppress the formation of the secondary phases. It can also optimize the Fermi level offset and promote the separation of the photoinduced carriers, resulting from its characteristic of high work function. Besides, a small part of the Bi element can diffuse into Cu 2 ZnSn(S, Se) 4 film and induce the crystal growth and restrain Zn-related defects, which is attributed to forming the low melting-point liquid BiSe x phase during the high-temperature selenization process. The conclusions highlight the bifunction of the thin Bi 2 S 3 intermediate layer, which can provide a new approach to improve the photoelectric conversion efficiency of kesterite solar cells.
研究领域:
材料科学
·
能源科学
·
光伏技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Mingyong Jia,Qianshun Cui,Yueqi Wu,Chengquan Shen,Qiang Shen,Fei Chen
Given the insufficient wettability and compatibility between ceramic and metal, heterogeneous grain boundaries in particular composites consistently represent the primary failure sites related to both mechanical loading and chemical corrosion. To solve as above–mentioned problem and improve the interfacial bonding of ceramic/metal composites, we performed a novel strategy to modify the grain boundaries of AlN/Mo composites via Ni nanoparticles , which was produced via rotary chemical vapor deposition . Without sacrificing ductility, a substantial 46.1 % increase in bending strength was successful attained arises from the combined influence of grain boundary density and diffusion depth, interfacial structure and electronic properties. In view of the limitations of the traditional blending methods, this study made full use of random nucleation characteristics during the oxidation/reduction process in RCVD to form uniform nanoparticle coating on the surface of AlN powder, thereby avoiding potential risks to AlN/Mo composites, such as brittle intermetallic compounds , localized performance variations.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 6
·2591-2599
·
IF 3.069
Jing Xu,Yue Wang,Yunxiang Cao,Zhengke He,Lianming Zhao,Ubong Jerome Etim,Peng Bai,Zifeng Yan,Pingping Wu
A foam-like mesoporous silica (MCF)-supported gold (Au) nanoparticle (NP) catalyst was prepared by a facile one-pot synthesis strategy. SnOx and MoOx were introduced as promoters by a wet impregnation method to synthesize promoted catalysts Au–SnOx/MCF and Au–MoOx/MCF, respectively. The evaluation of the prepared catalysts in benzyl alcohol oxidation shows that introduction of a low amount of SnOx (0.2 wt%) leads to a higher catalytic activity, while a relatively high amount of SnOx (1.0 wt%) exhibits a lower catalytic activity than the unpromoted Au NP catalyst. Both characterization results and density functional theory (DFT) calculations suggest that the most important effect of SnOx species on gold catalysts is the strong interaction between them which leads to electron transfer and lattice distortion of Au NPs, providing more low-coordinated Au active sites. This structural modification enhanced the chemisorption of reactants and lowered the energy barrier for the dissociation of O2 molecules on the surface of gold catalysts, improving the catalytic performance for benzyl alcohol oxidation. However, a weaker interaction was detected between MoOx and Au NPs on catalysts Au–MoOx/MCF and no lattice modification was observed; thus no improvement in the catalytic activity for benzyl alcohol oxidation occurred on catalysts Au–MoOx/MCF.
研究领域:
催化化学
·
材料科学
·
理论计算
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Sleshi Fentie Tadesse,Dong-Hau Kuo,Worku Lakew Kebede,Girma Sisay Wolde
Developing low-cost and visible-light-driven metal oxide and sulfide-based photocatalysts for the degradation of organic dyes has been a major area of research to mitigate environmental pollution. In this study, a low-cost and facile precipitation method at low temperature of 95 °C was used to synthesize visible-light-driven Nd 2 O 3 /Mo(S,O) 3-x ·0.34H 2 O heterojunctions (NdMoOS). The crystal structure, elemental composition, optical, and electrical properties of as-prepared materials were investigated using various analytical techniques. Organic dyes of methyl orange (MO), Rhodamine B (RhB), and Methylene blue (MB) were selected as model organic pollutants to evaluate the photocatalytic efficiency of as-synthesized materials under visible light irradiation. 20 mol% NdMoOS nanocomposite showed excellent degradation efficiency and it decomposed 98.8%, 99.9%, and 99.8% of MO, RhB, and MB after 120 min, 90 min, and 90 min visible light irradiation, respectively. HPLC-MS analysis further confirms the complete removal of dyes. The formation of heterojunction, high charge separation, and low recombination rate of photoinduced e - -h + pairs can contribute to the enhanced photocatalytic activity. Superoxide radicals (O 2–• ), hydroxyl radicals (HO • ), and holes (h + ) were identified as major oxidative species involved in the photocatalytic degradation mechanisms of MO, RhB, and MB dyes.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 23
·4138
·
IF 5.719
Weihua Qin,Yueming Ma,Ting He,Jingbin Hu,Pan Gao,Shaoxia Yang
A heterogeneous Fenton-like catalyst with single redox site has a rate-limiting step in oxidant activation, which limited its application in wastewater purification. To overcome this, a bimetallic doping strategy was designed to prepare a heterogeneous Fenton-like catalyst (Fe-Mo/rGO) with a double-reaction center. Combined with electrochemical impedance spectroscopy and density functional theory calculation, it was confirmed that the formation of an electron-rich Mo center and an electron-deficient Fe center through the constructed Fe-O-Mo and Mo-S-C bonding bridges induced a higher electron transfer capability in the Fe-Mo/rGO catalyst. The designed Fe-Mo/rGO catalyst exhibited excellent sulfamethazine (SMT) degradation efficiency in a broad pH range (4.8–8.4). The catalytic performance was hardly affected by inorganic anions (Cl−, SO42−and HCO3−) in the complicated and variable water environment. Compared to Fe/rGO and Mo/rGO catalysts, the SMT degradation efficiency increased by about 14.6 and 1.6 times in heterogeneous Fenton-like reaction over Fe-Mo/rGO catalyst. The electron spin resonance and radical scavenger experiments proved that ·O2−/HO2· and1O2dominate the SMT removal in the Fe-Mo/rGO/H2O2system. Fe and Mo, as active centers co-supported on rGO, significantly enhanced the electron transfer between catalyst, oxidant, and pollutants, which accelerated the reactive oxygen species generation and effectively improved the SMT degradation. Our findings offer a novel perspective to enhance the performance of heterogeneous Fenton-like catalysts by accelerating the electron transfer rate in the degradation of organic pollutants.Keywords:heterogeneous Fenton-like reaction;Fe-Mo dual-reaction-center catalyst;reactive oxygen species;sulfamethazine
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
Small
·
2018
·Vol. 14
·期 27
·1800090
·
IF 9.598
Lianshan Sun,Chunli Wang,Xuxu Wang,Limin Wang
Controllable synthesis of functional materials is of widespread interest for particle engineering. Such a method has not been widely promoted due to the lack of recognition of the fundamental principle, especially for organic–inorganic hybrid materials. Here, as an entrance, the controllable synthesis of Mo-polydopamine coordination flowers is realized through a facile foaming method, and a 2D nanopetal as the building monomer of the flower is synthesized. Depending on the morphology evolution of Mo-dopamine complex under different conditions, and the surface iterative topology growth of the Mo-polydopamine petal, the reasons of why the Mo-polydopamine complex self-assembles into a flower structure can be attributed to the synergistic effect of multicore symbiosis and structural self-protective growth behaviors. Benefiting from the strong structure stability of the Mo-polydopamine nanopetal, a hybrid structure of MoO 2 quantum dot in situ anchoring in the N-doped 2D carbon framework is prepared by direct pyrolysis, which shows a highly reversible performance in application for lithium-ion secondary batteries (LIBs). This work enhances the possibility for the controllable synthesis of organic–inorganic hybrid materials by adjusting the multicore intergrowth and inhibiting the interfacial assembly.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Liang Cheng,Biaojie Yan,Rui Gao,Xiangdong Liu,Zhenliang Yang,Bingqing Li,Yi Zhong,Pengchuang Liu,Yun Wang,Mingfu Chu,Bin Bai,Pengcheng Zhang
UO 2 /Mo composite pellets with enhanced thermal conductivity have been considered for the novel construction of high-safety fuel systems. UO 2 /Mo core-shell composite pellets with a reasonable porosity of 4–5% were fabricated by spark plasma sintering (SPS). In the SPS UO 2 /Mo composite, the majority of pores remained homogeneous in the UO 2 matrix, while it had a dense morphology in the continuous Mo channel for the heat conduction . The sintering behaviour of the UO 2 /Mo composite indicated that the incorporating Mo impeded densification of UO 2 , and the primary densification temperature ranged from 903 K to 1270 K. To introduce 2 vol% Mo to UO 2 , the thermal conductivity (TC) was enhanced to 4.02 W/m·K at 1073 K. The above result represented a 23.31% improvement over the value of 3.26 W/m·K (Fink) for a pure UO 2 pellet, which was approximated by the revised Hasselman-Johnson model. In particular, the coefficient of thermal expansion (CTE) was reduced to 10.0 × 10 −6 /K from 298 K to 1673 K, representing an 8.83% reduction from the value of 10.98 × 10 −6 /K (Martin) for a pure UO 2 pellet. The reduction effect on the CTE was superior to that of other UO 2 matrix composites fuel systems and, hence, offers an external safety aspect for reactors at the elevated temperatures close to accident conditions. These results provide a feasible method for the fabrication of a UO 2 /Mo core-shell pellet as an accident tolerant fuel.
研究领域:
核能工程
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）