ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xiaoqing Yue,Jianqun Yang,Weiqi Li,Yuhang Jing,Lei Dong,Yubao Zhang,Xingji Li
Hydrogen (H2) is an environment-friendly clean energy. In recent years, novel hydrogen evolution electrocatalysts have attracted extensive attention in the scientific community. In this work, the conversion of 2H phase tungsten selenide (2H-WSe2) into 1T phase tungsten selenide (1T-WSe2) was induced by 1 MeV electron irradiation to improve its electrocatalytic performance. When the irradiation fluence is 5 × 1014 e/cm2, the minimum initial overpotential of WSe2 is 101 mV lower than the initial overpotential of WSe2 without irradiation. This method has the characteristics for a simple process and mass production. At the same time, the atomic structure of WSe2 was characterized and the 1T properties of WSe2 were confirmed. The experimental results show that 1 MeV electron irradiates WSe2 to produce Se vacancies on the base surface to form 1T-WSe2, which is the main reason for improving its performance. This effective and feasible electron irradiation method provides a new strategy for the controllable acquisition of 1T-WSe2 and a new method for other similar materials to introduce the ideal 1T phase.
研究领域:
材料科学
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电催化
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能源转换
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Chenhao Sun,Fangqin Li,Jianxing Ren,Jiang Wu,Guanjun Wang,Linfeng Chen
Exploring low-cost and earth-abundant photocatalysts to efficiently release H 2 from wastewater is an appealing solution for global energy and environmental issues. Here, we successfully prepared flower-like 1T/2H-MoS 2 -decorated g-C 3 N 4 (thiourea)/g-C 3 N 4 (urea) (denoted as CNT/CNU) isotype heterojunction photocatalysts via a facile ultrasonic dispersion method and researched the photocatalytic H 2 generation and pollutant degradation performance in oxalic acid (OA) simulated wastewater. The results displayed that 20% 1T/2H-MoS 2 @CNT/CNU sample exhibited the highest photoreactivity, and the H 2 release rate was 1563.32 μmolg -1 h −1 , which was about 96 times higher than the CNT/CNU. Meanwhile, it also showed the highest total organic carbon (TOC) removal rate of 67.5%. The increased photoreactivity of nanocomposites can be ascribed to the double-interface system to effectually improve the separation of photoinduced charges. Additionally, the experimental results further confirmed that the loading of flower-like 1T/2H-MoS 2 could provide abundant active sites as well as expand the visible-light absorption range. Significantly, photoelectrochemistry measurements and density functional theory (DFT) calculations also confirmed that 1T/2H-MoS 2 cocatalysts accelerated the charge migration. On this basis, the mechanism of 1T/2H-MoS 2 @CNT/CNU promoting hydrogen production and synergistic OA degradation was proposed. This research presents a prospective idea for the utilization of waste water and the simultaneous production of clean energy.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ziheng Wei,Yongping Liu,Qi Ding,Yuena Zhang,Yu Ren,Jihu Chen,Mingming Si,Yuchi Fan,Wan Jiang
Conductive two-dimensional (2D) materials exhibit excellent electromagnetic wave (EMW) absorption properties at high frequencies due to their high conductivity loss. However, their unsatisfactory EMW absorption at low frequencies, attributed to impedance mismatch, remains a significant challenge. In this work, high-conductivity 1T′ WTe 2 nanosheets were incorporated into insulating mesoporous channels of Santa Barbara Amorphous-15 (SBA-15) via chemical vapor deposition (CVD), resulting in the formation of 1T′ WTe 2 /SBA-15 composites. These mesoporous channels restrict the growth of 1T′ WTe 2 and hinder carrier migration cross the channels, reducing their conductivity. Meanwhile, heterogeneous interfaces were formed between 1T′ WTe 2 nanosheets and mesoporous channels of SBA-15, accompanied by defects within the 1T′ WTe 2 nanosheets. This interaction promotes dipole polarization losses, significantly enhancing the attenuation of incident EMW, particularly at low frequencies. Consequently, the effective absorption bandwidth (EAB) of 1T’ WTe 2 /SBA-15 composites within the S band reached to 0.72 GHz, ranging from 3.28 GHz to 4.0 GHz, with a minimum reflection loss (RL min ) of −26.5 dB at 3.68 GHz. Furthermore, the EAB of the composites extended to 3.92 GHz at 1.5 mm in the high-frequency range. This work introduces a novel strategy for enhancing EMW absorption performance in the S band through heterogeneous interfaces and defect engineering, driven by the limiting effects of mesoporous channels.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Zizun Tian,Qianqiao Chen,Qin Zhong
Honeycomb spherical metallic 1T-MoS 2 was fabricated as an efficient counter electrode (CE) for quantum dot sensitized solar cells (QDSSCs) via facile hydrothermal method using environment-friendly F127 as soft templates. Electrochemical tests show that the interface charge transfer resistance ( R ct ) of 1T-MoS 2 is only 0.66 Ω with 3% template, demonstrating its superior electrocatalytic activity for S n 2− reduction. The power conversion efficiency of QDSSCs assembled with Ti-mesh substrate MoS 2 CEs reached 6.03%. The outstanding performance is mainly ascribed to the unique morphological advantage and intrinsically excellent conductivity, catalytic activity and hydrophilicity of 1T-MoS 2 . The honeycomb spherical 1T-MoS 2 increases the specific surface area and provides rich catalytic active sites and electrolyte transport channels, also enhances the stability of 1T-MoS 2 . The experimental results reveal 1T-MoS 2 is expected to be a competitive CE material for efficient QDSSCs.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Miaogen Chen,Wenya Chang,Jing Zhang,Wan Zhao,Zhi Chen
Water pollution caused by antibiotics is a growing problem. Semiconductor photocatalysis is an environmentally friendly technology that can effectively degrade organic pollutants in water. Therefore, the development of efficient photocatalysts is of great significance to solve the environmental pollution problem. In this paper, mixed-phase TiO2 and 1T/2H-MoS2 composite (1T/2H-MoS2/TiO2) were synthesized by the in situ growth method. The prepared compounds were characterized and applied to the visible-light degradation of tetracycline hydrochloride. The photocatalytic effect of 1T/2H-MoS2/TiO2 on tetracycline hydrochloride is significantly enhanced under visible light and has good stability. It has potential applications in the treatment of organic pollutants in water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Usman Ghani,Nousheen Iqbal,Jinghan Li,Ahmed A. Aboalhassan,Boya Sun,Bowen Liu,Farman Ullah,Johar Zeb,Muhammed Imtiaz,Jiajun Gu,Qinglei Liu
Porous hard carbons (PHC) are promising anode materials in sodium-ion batteries; however, the availability of large surface area creates numerous irreversible active sites that cause rapid initial cycle capacity fading and electrode degradation, resulting in lower specific capacity and poor cycle stability. PHC surface modification via 2D transition metal dichalcogenides is a synergistic approach to combine excellent electrochemical properties of both materials and resolve these issues. Therefore, we designed 1T MoS 2 nanopatterned PHC skeleton using carbonization and hydrothermal treatment of biomass (chickpea husk). As a result, HC@MoS 2 -II electrode with extended d 002 spacing of MoS 2 nanolayers (0.650 nm) exhibited an excellent specific capacity of 470 mAh/g at 50 mA/g with high initial coulombic efficiency (63%) and ultra-long cycle stability (190 mAh/g) at 1000 mA/g over 3500 cycles. The extraordinary electrochemical performance can be attributed to the synergistic assembly, where the high surface area PHC skeleton effectively buffered large volume expansion during charging/discharging, and 1T MoS 2 nanoflowers added fast ionic diffusion kinetics and PHC surface protection.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Rongxin Cao,Hui Yuan,Ning Yang,Qihong Lu,Yuxiong Xue,Xianghua Zeng
Two-dimensional sulfide is considered as one of the best alternative for noble metal cocatalyst, whereas few-layered 1T WS 2 structure is very helpful to promote the photocatalytical activity for hydrogen generation. Herein, few-layered 1T-WS 2 /g-C 3 N 4 composites have been prepared via a facile one-step calcination route and used as a noble metal-free catalyst for H 2 evolution. The results showed that the optimized 1T-WS 2 /g-C 3 N 4 has a H 2 evolution rate of 10.08 mmol∙g −1 h −1 , which is 180 and 2.44 times larger than that of pure pristine g-C 3 N 4 and g-C 3 N 4 (Pt), respectively. The enhanced photocatalytic activity can be explained as the optimized 1T-WS 2 /g-C 3 N 4 sample has an increased light absorption (from visible to infrared region), better electrical conductivity and high density of active sites. The studies will be helpful for constructing high efficient heterostructured catalysts by loading 1T phase metal dichalcogenides 2D of material onto a two-dimensional material surface.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Semiconductors
·
2023
·Vol. 44
·期 11
·112701
·
IF 5.1
Liang Wu,Peng Wang,Xingwu Zhai,Hang Wang,Wenqi Zhan,Xinfeng Tang,Qianwen Li,Min Zhou
Metallic few-layered 1T phase vanadium disulfide nanosheets have been employed for boosting sodium ion batteries. It can deliver a capacity of 241 mAhg−1 at 100 mAg−1 after 200 cycles. Such long-term stability is attributed to the facile ion diffusion and electron transport resulting from the well-designed two-dimensional (2D) electron-electron correlations among V atoms in the 1T phase and optimized in-planar electric transport. Our results highlight the phase engineering into electrode design for energy storage.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 6
·1124
·
IF 4.324
Wan Zhao,Xin Liu,Xiuru Yang,Chunxi Liu,Xiaoxiao Qian,Tao Sun,Wenya Chang,Jingjing Zhang,Zhi Chen
Metallic 1T-phase MoS2is a newly emerging and attractive catalyst since it has more available active sites and high carrier mobility in comparison with its widely used counterpart of semiconducting 2H-MoS2. Herein, 1T/2H-MoS2(N) (N: MoO3nanowires were used to prepare 1T/2H-MoS2) was synthesized by using molybdenum trioxide (MoO3) nanowires as the starting material and applied in the photodegradation of antibiotic residue in water. Enhanced photocatalytic performance was observed on the obtained 1T/2H-MoS2(N), which was 2.8 and 1.3 times higher than those on 1T/2H-MoS2(P) (P: commercial MoO3powder was used to prepare 1T/2H-MoS2) and 2H-MoS2, respectively. The active component responsible for the photodegradation was detected and a reaction mechanism is proposed.Keywords:1T/2H-MoS2composite;molybdenum trioxide nanowires;photodegradation of antibiotic residue;hydrothermal method
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Lei Dong,Jiacheng Qiu,Jingyi zhang,Yan Han,Yang Liu,Dejun Li,Jianmin Feng,Huifen Peng
Potassium-ion batteries (PIBs) offer a promising alternative to lithium-ion batteries due to the abundant storage and low cost of potassium. However, they still suffer from severe volume expansion and sluggish kinetics. Herein, a supercritical CO 2 (SC CO 2 )-assisted strategy is employed to fabricate MoS 2 @CNT composites with enhanced electrochemical performance. The SC CO 2 process exfoliates bulk MoS 2 into ultrathin nanosheets and simultaneously anchors them onto single-walled carbon nanotubes (SWCNTs), forming a stable 3D conductive network. One step further, this method concurrently induces a partial phase transition of MoS 2 from the semiconducting 2H phase to the metallic 1 T phase, significantly improving electrical conductivity and ion transport. The MoS 2 @CNT/20 MPa composite demonstrates a high reversible capacity of 706.89 mA h g −1 at 0.1 A g −1 and retains 380.10 mA h g −1 at 2.0 A g −1 . Kinetic analysis reveals predominantly capacitive K + storage behavior, while ex situ characterizations after 100 cycles confirm the structural stability and the stable solid electrolyte interphase (SEI). This study highlights the synergistic effects of SC CO 2 exfoliation and SWCNT hybridization, offering a scalable and environmentally friendly approach for designing high-performance anode materials for next-generation PIBs.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Xiaoyue Chen,Songge Zhang,Xiu Qian,Zhangqian Liang,Yanjun Xue,Xiaoli Zhang,Jian Tian,Ye Han,Minhua Shao
Herein, we assemble semi-metallic 1T′ phase MoS 2 on the surface Ti 3 C 2 MXene (1T′-MoS 2 /Ti 3 C 2 composite) by one-step hydrothermal method for nitrogen fixation. 1T′-MoS 2 /Ti 3 C 2 composites present a high ammonia yield rate of 31.96 µg h −1 mg −1 cat. at − 0.95 V vs. RHE and a Faradaic efficiency (FE) of 30.75% at − 0.7 V, which is much better than pure 1T′-MoS 2 and pure Ti 3 C 2 MXenes alone. Furthermore, the 1T′-MoS 2 /Ti 3 C 2 composites exhibit good selectivity and stability with no significant decrease in ammonia yield rate and FE. Density functional theory (DFT) calculations reveal that 1T′-MoS 2 /Ti 3 C 2 composite makes the activation and further reduction of *N 2 more thermodynamically favorable than pure 1T′-MoS 2 . 1 5 N isotopic labeling experiment confirms that nitrogen in produced ammonia originates from N 2 in the electrolyte.
研究领域:
材料科学
·
电催化
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Dexuan Li,Guoshen Zeng,Yaoyao Wu,Zhenyu Zhou,Wei Guo,Chuanhao Li
The co-catalysts engineering, especially the non-noble traditional metal dichalcogenides (MoS 2 ), is a promising strategy in promoting photocatalytic water splitting for the green hydrogen gas production. Herein, we constructed a novel Au induced 1T-MoS 2 modified S-doped-g-C 3 N 4 (denoted as MASCN) photocatalyst . The experimental and characterizations results have showed that the sulfur doped g-C 3 N 4 (SCN) could increase the dispersity of the Au nanoparticles (NPs) and help to improve the combination between SCN and Au NPs to promote electrical conductivity . More importantly, ultra-stable 1T-MoS 2 was in situ formed within the induction of Au nanoparticles (NPs), thus providing high-density active sites and decreasing the interfacial charge transfer. As a result, the optimal sample exhibits a drastically enhanced photocatalytic hydrogen evolution rate (HER) of 4708.3 μmol/g/h, over 87-fold the rate of pure SCN (54 μmol/g/h) and appropriately 25-fold the rate of MoS 2 modified SCN (denoted as MSCN) (185 μmol/g/h). The hybrids also manifest excellent stability and durability in cycle. This study highlights the construction strategy of MoS 2 based co-catalyst for solar water splitting reactions and may provide insightful understandings for other photocatalytic applications.
研究领域:
材料科学
·
能源化学
·
光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）