JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Qingguo Yu,Yimin Liu,Qingru Zeng,Yuxiang Yang,Shunyan Ning,Yuezhou Wei,Xinpeng Wang,Deqian Zeng
Photocatalytic technology provides key benefits in utilizing solar energy for H 2 production and pollutant removal, making the pursuit of efficient photocatalysts a vital area of focus. Herein, a novel p-n heterojunction photocatalyst was synthesized by loading ZnSe nanoparticles onto Cu 2−x Se nanoplates, creating an internal electric field that facilitates the efficient separation of charge carriers and significantly enhances photocatalytic activity. The 14 % Cu 2−x Se/ZnSe nanocomposite exhibits excellent photocatalytic performance, achieving an H 2 production rate of 1846 μmol·g −1 ·h −1 , roughly 34 times that of pure ZnSe. Additionally, the Cr(VI) reduction rate constant of nanocomposite was 0.0277 min⁻¹ , which is 20 times and 5 times higher than those of ZnSe and Cu 2−x Se, respectively. The Cu 2−x Se/ZnSe photocatalyst demonstrated exceptional stability and reusability during multiple cycles of H 2 production and Cr(VI) reduction. An in-depth examination of experimental data and density functional theory (DFT) calculations led to proposing a potential mechanism. This work introduces a simple synthesis method for ZnSe-based photocatalysts, offering a novel approach for the effective application of solar energy in environmental and energy fields.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2019
·
IF 1.795
Yanjie Zhou,Wei Wei,Hua Su,Wei Wang
Developing a sensitive and reliable method for accurate determination of H 2 is of great importance for effective and safe utilization of H 2 in various conditions. A fluorescence (FL) assay for H 2 detection was proposed in the present work. It relied on the fact that Pd/C nanocomposites catalyzed fluorogenic conversion of weakly-FL resazurin (RZR) into highly-FL resorufin (RSR) was triggered by H 2 under ambient condition. This method possessed a limit of detection (LOD) as low as 0.06% volume concentration of H 2 in air, far below 4% that is the generally recognized as the lower explosion limit of H 2 -air mixture. A high selectivity to H 2 over O 2 , N 2 , Ar and CO 2 as well as broad linear response range from 0.2% to 80% made this method promising for H 2 sensing in a variety of circumstances. Most importantly, the developed method was able to detect practical H 2 atmosphere (2% H 2 in air) with high reliability under simple operation.
研究领域:
化学
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材料科学
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分析化学
✓ 已验证
DOI
高影响因子
WASTE MANAGEMENT
·
2019
·
IF 5.431
Hongcai Su,Ekkachai Kanchanatip,Defeng Wang,Rendong Zheng,Zhicheng Huang,Yang Chen,Ishrat Mubeen,Mi Yan
In China, waste sorting practice is not strictly followed, plastics, especially food packaging, are commonly mixed in food waste. Supercritical water gasification (SCWG) of unsorted food waste was conducted in this study, using model unsorted food waste by mixture of pure food waste and plastic. Different operating parameters including reaction temperature, residence time, and feedstock concentration were investigated. Moreover, the effect of three representative food additives namely NaCl, NaHCO 3 and Na 2 CO 3 were tested in this work. Finally, comparative analysis about SCWG of unsorted food waste, pure food waste, and plastic was studied. It was found that higher reaction temperature, longer residence time and lower feedstock concentration were advantageous for SCWG of unsorted food waste. Within the range of operating parameters in this study, when the feedstock concentration was 5 wt%, the highest H 2 yield (7.69 mol/kg), H 2 selectivity (82.11%), total gas yield (17.05 mol/kg), and efficiencies of SCWG (cold gas efficiency, gasification efficiency, carbon gasification efficiency, and hydrogen gasification efficiency) were obtained at 480 °C for 75 min. Also, the addition of food additives with Na + promoted the SCWG of unsorted food waste. The Na 2 CO 3 showed the best catalytic performance on enhancement of H 2 and syngas production . This research demonstrated the positive effect of waste sorting on the SCWG of food waste, and provided novel results and information that help to overcome the problems in the process of food waste treatment and accelerate the industrial application of SCWG technology in the future.
研究领域:
环境科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Yuehu Wan,Shiwen Du,Congrong Lu,Kuankuan Ren,Biyun Shi,Shiyan Liu,Chunhe Li,Weidong Dou,Ping Fang,Na Ye
Visible-light-driven photocatalysis holds a broad prospect for alleviating the energy crises. Here we report novel CuS nanoparticles/CdS nanowires Schottky heterojunctions via a two-step hydrothermal synthesis and used for photocatalytic H 2 generation driven by visible-light (λ ≥ 420 nm). Compared with pure CdS NWs, the CuS/CdS nanocomposites show outstanding visible light H 2 evolution, with an optimal rate reaching 2076.5 μmol h −1 g −1 . The intrinsic properties of CuS/CdS nanocomposites, such as structure, optical properties , and combined configuration are systematically analyzed by experimental characterizations and theoretical calculations. The comprehensive results show that the Schottky junction between CuS NPs and CdS NWs accelerates photoinduced electron drift from semi-conductive CdS to metallic CuS, improving their activities of water splitting. This work offers a simple route to synthesize one-dimensional CdS-based nanocomposites for efficient visible-light driven energy conversion.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Ding Wang,Jialin Yang,Liping Bao,Yu Cheng,Liang Tian,Qingxiang Ma,Jingcheng Xu,Hui-Jun Li,Xianying Wang
Hydrogen (H 2 ) molecules are easy to leak during production, storage, transportation and usage. Because of their flammability and explosive nature, quick and reliable dectection of H 2 molecule is of great significance. Herein, an excellent H 2 gas sensor has been realized based on Pd nanocrystal sensitized two-dimensional (2D) porous TiO 2 (Pd/TiO 2 ). The formation of 2D porous TiO 2 with the removal of graphene oxide template has been monitored by an in-situ transmission electron microscope. It is found that the size of the GO template can be almost completely replicated by 2D TiO 2 . The Pd/TiO 2 sensor exhibited an instantaneous response and a satisfactory low detection limit for H 2 detection. These excellent gas-sensing performances (good selectivity, unique linearity response and high stability) can be attributed to the unique 2D porous structure and the synergistic effect between oxidized Pd and TiO 2 , including the unique adsorption properties of O 2 or/and H 2 on Pd/TiO 2 , the reaction between PdO and H 2 gas, and the regulated depletion layer arising from p-type PdO to n -type TiO 2 . This work demonstrates a rational design and synthesis of highly efficient H 2 sensitive materials for energy and manufacturing security.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Zhonghui Zhang,Changlei Qin,Zhiliang Ou,Jingyu Ran
H 2 S is a kind of common impurity produced during the gasification of biomass, and it will poison the catalysts used in biomass tar steam reforming , leading to a rapid degradation on the catalytic performance. The purpose of this work is to investigate the characteristics of biomass tar steam reforming using Ni/perovskite catalysts with the presence of H 2 S. Results show that H 2 S could significantly reduce catalytic activity due to the adsorption of sulfur on Ni surface , and Ni/perovskite catalysts are less susceptible to this poisoning in comparison to the Ni-catalyst loaded on γ-Al 2 O 3 . To understand the mechanism, fresh and spent catalysts were characterized using various techniques of XRD , SEM-EDS, XPS and TPO . It is proved that the lattice oxygen in perovskite could transform into surface species, inhibit the adsorption of sulfur and thus benefit to the reactivity of catalysts during biomass tar steam reforming.
研究领域:
化学工程
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能源科学
✓ 已验证
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2023
·Vol. 18
·期 1
·1-9
·
IF 4.5
Sun Likun,Xiong Kesi,Zhang Baoning,Fang Jinghong,He Yingchao,Wang Min,Gan Zhixing,Du Fanglin,Sun Qiong,Yu Liyan,Dong Lifeng
In a dual-chamber photocatalytic fuel cell device, polyvinyl alcohol degradation and H 2 evolution were concurrently achieved. The setup involved commercial P25 as the photoanode and Ag@Fe 2 O 3 nanoparticles as the cathode. Additionally, the feasibility of a Fenton-like reaction in the cathode, utilizing Fe 2+ ions and pumped O 2 , was demonstrated. Different cathode materials, polyvinyl alcohol types, and pH values’ effects were assessed on device performance. Quenching tests highlighted photoinduced holes (h + ) and OH· radicals as pivotal contributions to polyvinyl alcohol degradation. Long-term stability of the device was established through cycling experiments.
研究领域:
环境科学
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材料科学
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能源科学
✓ 已验证
DOI
高影响因子
ACS ES&T Water
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2022
·
IF 0
Qiu-Jin Xu,Ling-Dong Shi,He-Ping Zhao
As one of the most widely used antibiotics, sulfamethoxazole (SMX) is frequently detected in wastewater, imposing a high risk to human health. Current biological and chemical methods for SMX removal are generally lacking in efficiency or are cost-intensive. Here, we demonstrated highly efficient catalytic SMX removal by using a H2-based membrane palladium-film reactor (H2-MPfR), which delivered H2 directly to palladium (Pd0) nanoparticles through bubbleless hollow fibers. The SMX removal rate using this system could reach up to 4.25 mg/L per h, much higher than many other biological or chemical reduction processes. Low H2 partial pressure (e.g., 0.025 MPa under the experimental condition) was proved sufficient for high-rate SMX removal, while appropriate Pd dosage (e.g., 100 mg/dm2) and hydraulic retention time were favorable for maintaining the efficiency of SMX removal. Furthermore, high-performance liquid chromatography and quadrupole-time-of-flight mass spectrometry analyses revealed that the H2-MPfR may remove SMX by destroying the isoxazole ring, and the transformation products have a lower toxicity than SMX. Overall, this study sheds light on catalytic SMX degradation and is helpful in developing cost-effective strategies for removing antibiotics from wastewater.
研究领域:
环境科学
·
催化化学
·
水处理工程
✓ 已验证
DOI
Nano Research
·
2019
·Vol. 12
·期 9
·2335-2340
·
IF 8.515
E Bin,Huang Bolong,Zhang Nan,Shao Qi,Li Yujing,Huang Xiaoqing
Although many previous studies have shown that the shape-control of nanocrystal (NCs) is an efficient strategy to improve the catalytic performance, these syntheses were conducted under very different conditions, which are not suitable for the shape-dependent properties studies as well as catalysis optimization. Herein, we demonstrate an effective method for the selective synthesis of well-defined PtPb NCs in a highly controllable manner. Four distinct PtPb NCs, namely PtPb peanut nanocrystals, PtPb hexagonal nanoplates, PtPb octahedra nanocrystals (ONCs) and PtPb nanoparticles have been selectively prepared in the presence of different phenols. Significantly, we found that the created PtPb NCs/C shows the shape-dependent activity with the optimized PtPb ONCs/C being the most active for the ethanol reforming to H 2 , 22.4 times higher than the commercial Pt/C. The high performance of PtPb ONCs/C has been also successfully expanded into other polyhydric alcohols reformings. X-ray photoelectron spectroscopy (XPS) reveals that the high Pt(0)/Pt(II) ratio in PtPb NCs/C enhances the alcohols reforming. The density functional theory (DFT) studies show the PtPb ONCs possess the highest surface averaged electronic occupation for unit Pt-atom, matching well with XPS results. The PtPb ONCs/C also displays excellent durability with limited activity decay and negligible structure/composition changes after ten cycles. This work demonstrates an important advance in the high-level control of metallic nanostructures to tune the catalytic activities.
研究领域:
催化化学
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材料科学
·
理论计算
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 10
·835
·
IF 3.504
Jiaqi Chen,Shaolong Huang,Yaojia Long,Jiahao Wu,Hui Li,Zhao Li,Yu-Jia Zeng,Shuangchen Ruan
Photocatalysis is a green technique that can convert solar energy to chemical energy, especially in H2production from water splitting. In this study, ZnO and red phosphorus (ZnO/RP) heterostructures were fabricated through a facile calcination method for the first time, which showed the considerable photocatalytic activity of H2evolution. The photocatalytic activities of heterostructures with different ratios of RP have been investigated in detail. Compared to bare ZnO, ZnO/RP heterostructures exhibit a 20.8-fold enhancement for H2production and furthermore overcome the photocorrosion issue of ZnO. The improved photocatalytic activities highly depend on the synergistic effect of the high migration efficiency of photo-induced electron–hole pairs with the inhibited charge carrier recombination on the surface. The presented strategy can also be applied to other semiconductors for various optoelectronics applications.Keywords:photocatalysis;H2evolution;red P;ZnO;heterostructure
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2021
·
IF 5.039
Yongjie Liu,Ran Xin,Donglai Ma,Qingqing Hu,Yue Wang,Zhixiong You
Ferrovanadium nitride, which comprises V and N, is an important alloy additive for the production of high-strength low-alloy steel. As an efficient reducing agent and nitrogen source, ammonia gas is widely used in the preparation of metal nitrides. In this study, ferrovanadium nitride alloy powder is prepared by reducing and nitriding VO 2 /Fe 2 O 3 in NH 3 –H 2 gas mixtures with different nitriding potentials. Thermodynamic analysis indicate that the reduction and nitridation of VO 2 and Fe 2 O 3 is feasible. VO 2 is converted into VN, whereas Fe and Fe 4 N can be formed depend on the reaction conditions. Lower temperatures and higher nitriding potentials are beneficial to the formation of Fe 4 N. Based on Rietveld refinement analysis, the formation of Fe 4 N and the atomic occupancy of V and N in vanadium oxynitride, which is associated with the temperature, reaction time, and nitriding potential, is determined. A ferrovanadium nitride alloy powder with an O content of 0.26 wt.% is prepared by reducing and nitriding VO 2 /Fe 2 O 3 at 900 °C for 1 h at a nitriding potential of 4.4 × 10 −3 Pa −0.5 .
研究领域:
材料科学
·
冶金工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Hong Tian,Yumin Li,Qingping Dai,Shunlang Wei,Zhibin Qiu,Wenzhong Wang
Cadmium sulfide (CdS), as a potential photoelectrochemical (PEC) photoanode candidate, generally exhibits unsatisfactory hydrogen generation because of the serious recombination of charge carriers and photocorrosion. In this work, a feasible p-n heterostructure CdS/AgVO 3 nanorod arrays (NRAs) photoanode was fabricated by modifying n-type CdS nanorod arrays with p-type AgVO 3 nanoparticles for enhancing PEC hydrogen evolution property of CdS NRAs photoanode. In this p-n heterostructure CdS/AgVO 3 nanorod arrays photoanode, AgVO 3 with narrower band gap not only distinctly heightens the visible light absorption ability of CdS, but also significantly integrates with CdS to establish charge transfer path at CdS and AgVO 3 interface. The built-in electric field of the p-n junction improves the separation and transfer efficiency of photogenerated electrons (e − ) and holes (h + ). The CdS/AgVO 3 NRAs photoanode achieves an evident hydrogen evolution rate of 165.05 μmol cm −2 h −1 , higher than that of bare CdS (121.85 μmol cm −2 h −1 ) NRAs photoanode. This work offers an effective scheme to fabricate photoanode for efficiently turning the solar energy into a green and clean energy.
研究领域:
材料科学
·
能源科学
✓ 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）