APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Xue Zhao,Xue Li,Zhu Zhu,Wanbiao Hu,Haibo Zhang,Jian Xu,Xun Hu,Yingtang Zhou,Ming Xu,Hucai Zhang,Guangzhi Hu
Effective removal of pollutants that affect human health and ecosystem stability is a crucial challenge. Here, the structural confinement engineering strategy realizes the effective anchoring of atomically dispersed Co in the B-doped-CN network (BCN) (BCN/CoN[2 +2]). The advanced oxidation process (AOP) involved BCN/CoN[2 + 2] has realized the rapid and complete degradation to tetracycline (TCL), the removal of approximately 80% and 100% of tetracycline was achieved in 5 min and 30 min, respectively. The AOP with BCN/CoN[2 + 2] can degrade TCL over a wide pH; in addition, BCN/CoN[2 + 2] has the ability to efficiently degrade common pollutants, and its catalytic activity did not decay even if it was used repeated five times. Electron paramagnetic resonance (EPR) spectroscopy shows that BCN/CoN[2 + 2] drives the complete conversion of peroxymonosulfate (PMS) to 1 O 2 , and density functional theory calculations demonstrate that the base for the conversion of PMS to 1 O 2 is from the isolated state of the active site Co.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Bo Wang,Masakazu Anpo,Jing Lin,Can Yang,Yongfan Zhang,Xinchen Wang
The preparation of ternary hexagonal boron carbon nitride (h-BCN) nanosheets was carried out by doping biomass glucose in situ into hexagonal boron nitride (h-BN). With this method, the construction of a two-dimensional (2D) semiconductor with tunable bandgap and characteristic adsorption ability toward organic molecules was achieved by maintaining the specific structure of h-BN and π-π interactions toward aromatic compounds. The ternary 2D h-BCN nanosheets worked effectively not only as a desirable adsorbent but also as an activator to benzene. Furthermore, the unique 2D h-BCN nanosheets were found to work as effective photocatalysts to convert benzene into phenol with less over-oxidation, leading to the development of a new type of Fenton oxidation reaction as the one-step visible light-driven hydroxylation of benzene. An optimal yield of 14.0% and its selectivity of 88.3% for the photocatalytic production of phenol from benzene were achieved by using h-BCN in the presence of FeCl 3 and H 2 O 2 in sustaining the same reactivity even after 4 cycles. This present study reports the latest development of phenol production from benzene by applying 2D h-BCN nanosheets as an artificial photosynthetic catalyst.
研究领域:
催化化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Yu Wang,Feng Gu,Lei Cao,Lanlan Fan,Tianjie Hou,Qian Zhu,Yu Wu,Shixian Xiong
Developing non-noble metal oxygen reduction reaction (ORR) electrocatalysts with high performance, excellent stability, and low-cost is crucial for the industrialization of fuel cells. Herein, trace level Co modified 3D hybrid titanium carbonitride MXene and boron-carbon-nitrogen nanotubes catalyst (TiCN–BCN–Co) is fabricated by spray-lyophilization and high-temperature pyrolysis . This strategy not only avoids the oxidation of Ti 3 C 2 T x MXene, but also introduces nitrogen atoms into the titanium carbide lattice to form a more electrocatalytically active TiCN crystal phase. The obtained TiCN–BCN–Co exhibits superior ORR catalytic activity with a positive half-wave potential of 0.83 V vs. RHE and outperforms commercial Pt/C in terms of stability and methanol tolerance. Impressively, the Zn-air battery with TiCN–BCN–Co cathode achieves a superior specific capacity of 791 mAh g −1 and long-term stability of 200 h.
研究领域:
材料科学
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电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xue Zhao,Ziqiong Yang,Artem V. Kuklin,Glib V. Baryshnikov,Hans Ågren,Wenjing Liu,Haibo Zhang,Xiaohai Zhou
The electricity provided by solar or wind power can drive nitrogen in the atmosphere, combining with ubiquitous water to form ammonia, and distributed production methods can alleviate the irreversible damage to the environment caused by the energy-intensive Haber–Bosch process. Here, we have designed a novel Ni-doped BCN heterojunction (S/M-BOPs-1) as a catalyst for the electrochemical nitrogen reduction reaction (NRR). The ammonia yield rate and Faraday efficiency in NRR driven by S/M-BOPs-1 reach up to 16.72 μg–1 h–1 cm–2 and 13.06%, respectively. Moreover, S/M-BOPs-1 still maintains high NRR activity and excellent stability after recycling for eight times and long-time operation of 12 h. Using density functional theory calculations, we reveal a possible NRR path for N2 to NH3 on Ni, BCN, and the S/M-BOPs-1 composite surfaces. The interaction between the BCN matrix and Ni nanoparticles promotes a synergetic effect for the electrochemical NRR efficiency due to the partial electron transfer from the Ni particles to BCN that inhibits hydrogen evolution reaction and decreases the rate-determining step on Ni surfaces toward NRR by ∼1.5 times. Therefore, efficient NRR performance can be achieved by tuning the electronic properties of non-noble metals via the formation of a heterointerface.
研究领域:
化学
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材料科学
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环境科学
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电化学
✓ 已验证
DOI
PubMed
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
·
2023
·Vol. 54
·期 11
·4332-4341
·
IF 2.8
Li Hang,Dong Longhao,Duan Hongjuan,Huang Zhong,Li Yage,Liu Xuefeng,Huang Ren,Jia Quanli,Ye Hang,Zhang Haijun,Zhang Shaowei
Non-oxide ceramic aerogel draws increasing attention in area of thermal insulation because of its low density, high temperature resistance and good chemical/thermal stability. Here, a BCN-TiN composite aerogel was prepared by an in-situ carbothermal reduction/nitridation method, using melamine (C 3 N 6 H 6 ), boric acid (H 3 BO 3 ), chitosan ((C 6 H 11 NO 4 ) n ) and titanium dioxide (TiO 2 ) as raw materials. The aerogel prepared at 1473 K showed a porosity high up to 97.6 pct with a density of 0.05 g/cm 3 . When testing at a temperature of 673 K, the thermal conductivity value of as-obtained composite aerogel was as low as 0.135 W/(m K). Moreover, the lightweight BCN-TiN aerogel had the high-temperature stability (at least 1473 K) and good compression strength, which ensures it a potential high-temperature insulation material in inert atmosphere. Graphical Abstract
研究领域:
材料科学
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热能工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xue Zhao,Zhu Zhu,Yingnan He,Haibo Zhang,Xiaohai Zhou,Wanbiao Hu,Meng Li,Shusheng Zhang,Yemin Dong,Xun Hu,Artem V. Kuklin,Glib V. Baryshnikov,Hans Ågren,Thomas Wågberg,Guangzhi Hu
Electrochemical synthesis of ammonia driven by clean energy is expected to realize the supply of ammonia for distributed production of industry and agriculture. Here, nickel nanoparticles and nickel in the form of single atoms were simultaneously anchored on the electrochemically active carrier BCN matrix through a structured domain strategy, which realized a high-efficiency, high-value-added, conversion of nitrate in sewage. Specifically, the electrochemical nitrate reduction reaction (NIRR) driven by BCN@Ni in alkaline media achieves an ammonia yield rate as high as 2320.2 μg h −1 cm −2 (at −0.5 V vs RHE), and Faraday efficiency as high as 91.15% (at −0.3 V vs RHE). Even in neutral and acidic media, the ammonia yield rates of NIRR driven by BCN@Ni are as high as 1904.2 μg h −1 cm −2 and 2057.4 μg h −1 cm −2 , respectively (at −0.4 V vs RHE). The 15 NO 3 - isotope labeling experiment verified that the recorded ammonia all came from the electrochemical reduction of NO 3 – on BCN@Ni. Density functional theory (DFT) calculations show that both nano-Ni and single-atom Ni in BCN@Ni have the ability to electrochemically convert NO 3 – into NH 3 , and that the addition of BCN can further promote the NIRR on Ni.
研究领域:
环境科学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 8
·期 5
·1803-1810
·
IF 6.641
Yapeng Zheng,Xinmei Hou,Qun Li,Zhi Fang,Tao Yang,Tongxiang Liang,Xiangmei Duan,Minghui Shang,Weiyou Yang
In this manuscript, a novel photocatalyst, CdS/BCN composites with CdS nanoparticles in situ grown on BCN nanosheets (CdS/BCN), was synthesized via a simple electrostatic interaction assisted supersaturated recrystallization method. Benefiting from a unique heterostructure, the CdS/BCN composites exhibited highly efficient and stable photocatalytic activity for degrading RhB and methylene blue under visible-light irradiation, and moreover, a high rate constant of 0.115 min−1 has been obtained for degrading RhB, which was much higher than that of most CdS based photocatalysts (0.089 min−1). First-principles calculations revealed that the significantly enhanced photocatalytic activity of the CdS/BCN composite was mainly ascribed to the formed type-II heterojunction and the built-in electric field at the interface between CdS nanoparticles and BCN nanosheets, which promote the transfer of photo-generated electrons between CdS and BCN, and the ˙O2− radical originating from enriched photo-generated electrons was found to be the dominant species that was responsible for the enhanced photocatalytic performance in degrading organic molecules.
研究领域:
材料科学
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化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yongxin Qian,Yubo Luo,You Li,Tianshun Xiong,Luyao Wang,Wenguang Zhang,Shuangfu Gang,Xin Li,Qinghui Jiang,Junyou Yang
The limited functionalization of current electronic packaging materials has restricted their use in advanced smart electronic devices with high energy density and low signal delay. In this study, we propose a novel strategy for developing an electronic packaging material (BCN@LDH/EP) that possesses exceptional electromagnetic wave (EMW) absorption, thermal management, and flame-retardant capabilities. BCN@LDH/EP is the double-level hollow core–shell structure (BCN@LDH) composed of a bowl-shaped carbon nanoshell (BCN) and a layered double hydroxide (NiAl-LDH). This structure offers rich heterogeneous interfaces and high specific surface area, thereby generating abundant polarization sites and favorable impedance matching. Consequently, the epoxy resin (EP) shows outstanding EMW absorption performance, with a maximum effective absorption band (EAB) of 6.43 GHz and a minimum reflection loss (RL) value of −55.75 dB at a filling amount of only 10 wt%. Moreover, the closely packed thermally conductive filler BCN@LDH provides a broad pathway for heat transfer within the EP, resulting in a significant thermal conductivity improvement efficiency (η) of ∼170%. Notably, the high-temperature cooling and barrier effects of BCN@LDH also confer excellent flame retardancy to the EP composite, reducing the total heat release (THR) rate by up to 44.9%.
研究领域:
材料科学
·
电气工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Xingang Luan,Qinghua Zhao,Shaomin Gu,Xichao Dong,Laifei Cheng,Ralf Riedel
Wireless passive sensors based on surface acoustic wave (SAW) provide a good solution for the measurement demand under high temperature and harsh conditions. SiBCN ceramics have excellent mechanical properties at high temperature and semiconductor behavior, making them potential for electrode of SAW sensors. To achieve the target conductivity, a series of SiBCN and SiNiBCN coatings are prepared by polymer derived ceramics (PDC) method and the influence of microstructure on the conductivity of the coatings is discussed. The results show that the conductivity of the SiBCN coatings is affected by both the content of free carbon and the degree of graphitization. The introduction of Ni leads to the formation of Ni 2 Si conductive microcrystals at lower temperatures and catalyzes the graphitization of the carbon phase, so that the SiNiBCN coatings show lower electrical resistivity. The amount of the metal conductive phase and the graphitization degree of the carbon phase increase with the pyrolysis temperature, resulting in decrease of the SiNiBCN coatings resistivity.
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
·
2024
·
IF 13.3
Xianghui Zeng,Hui Chen,Wei Fang,Zhaohui Huang,Daheng Wang,Xuan He,Xing Du,Weixin Li,Haijun Zhang,Lei Zhao
CO 2 photoreduction into highly value-added chemicals over metal-free h -BCN has emerged as a promising strategy to address the issue of global warming. However, the serious carrier recombination caused by disordered charger transfer has limited its practical application. To circumvent this issue, fluorine modified h -BCN were synthesized using a facile heat treatment method. The surface halogenation created local spatial polarized electric field, which facilitated the local charge separation and transmission efficiency. Among them, BCN-F-4 exhibited the best photocatalytic CO 2 reduction activitiy with CO and CH 4 yield of 25.38 and 14.11 µmol g −1 h −1 , respectively. The turnover number (TON) of BCN-F-4 reached up to 163.6 μmol g −1 h −1 , 4.4 times that of BCN. Both theoretical simulation and experimental analysis demonstrated a strong covalent interaction between the F atoms and the h -BCN matrix, which gain deep understanding of the mechanism of prominent photocatalytic CO 2 reduction activity boosted by surface halogenation.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2022
·
IF 8.455
Meng Li,Xinzhong Wang,Yelin Zhu,Xiuxiu Jia,Shusheng Zhang,Huaisheng Wang,Yongtao Li,Guangzhi Hu
Boron/nitrogen-co-doped carbon (BCN) nanosheets decorated with Fe 2 O 3 nanocrystals (Fe 2 O 3 –BCN) were cast on a glassy carbon electrode (GCE) and applied as an electrochemical sensor to effectively detect paraquat (PQ), a toxic herbicide, in aqueous environments. A linear experiment performed using square wave voltammetry (SWV) under optimized experimental conditions produced a decent linear relationship and a low detection limit (LOD) of 2.74 nmol/L (S/N = 3). Repeatability, reproducibility, stability, and interference experiments confirmed that the Fe 2 O 3 –BCN/GCE system exhibited decent electrochemical sensing performance for PQ molecules. Notably, the designed sensor showed high selectivity and a decent linear relationship with PQ concentration in natural water samples. To the best of our knowledge, this is the first study on the preparation of Fe 2 O 3 –BCN nanosheets for PQ detection. The proposed sensor can be employed as an effective alternative tool for distinguishing and processing PQ.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Dong Shi,Mingzhi Yang,Baoguo Zhang,Haixiao Hu,Zizheng Ai,Yongliang Shao,Jianxing Shen,Yongzhong Wu,Xiaopeng Hao
Boron carbonitrides (BCN) have been widely concerned in the field of energy storage and conversion. However, the energy storage mechanism of electrical double-layer behavior and their stacked-layer structure severely limit the improvement of capacitance, thereby hindering their further development in energy storage. Therefore, an ultrasonic-ball milling method was first chosen to obtain BCN nanosheets, together with a feasible way of polyaniline (PANI) modification performed to boost the capacitive reaction of BCN nanosheets. For the first time, a BCN-PANI-based symmetric supercapacitor device can reach a high voltage window of 3.0 V when 1 M Et 4 N·BF 4 was chosen as the electrolyte. The working voltage of 3.0 V is three times that of a device with pure PANI with the ultrahigh energy density of 67.1 W h kg −1 , superior to most of the reported PANI-based devices. The eminent electrochemical performance provides a promising strategy to pave the way for configuring carbon-based multiple composite electrodes for other energy storage devices.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）