JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qiqi Gu,Shijin Cheng,Qiaoyi Xiao,Qianchen Ou,Hongmei Wang,Yuan Lian,Liping Guo
The FeCo-LDH/Cd 1-x Zn x S nanocomposite was synthesized via an impregnation method, employing FeCo-LDH as a cocatalyst for simultaneous upcycling of polyethylene terephthalate (PET) plastics and photocatalytic hydrogen production. The 5 %LDH/Cd 0.5 Zn 0.5 S nanocomposite demonstrated an optimal hydrogen evolution rate of 3.67 mmol·g −1 ·h −1 in alkaline PET solution, which is 2.3 times higher than pristine Cd 0.5 Zn 0.5 S. Notably, the photocatalyst retained stable performance over six recycling tests without significant activity loss. Concurrently, PET oxidation by photogenerated holes yielded acetate as the primary product, achieving an 87 % yield. The real-world applicability of this approach was further validated through the successful photoreforming of a PET bottle. UV–vis DRS, TRPL, and PEC analyses revealed that the incorporation of appropriate amount of FeCo-LDH significantly enhanced charge carrier separation, thereby boosting the photocatalytic activity. Furthermore, UPS and DFT calculations elucidated the mechanistic pathway for PET conversion and hydrogen production over FeCo-LDH/Cd 0.5 Zn 0.5 S. This study presents a promising strategy for co-producing hydrogen and value-added chemicals from PET waste, highlighting its potential for practical recycling applications.
研究领域:
材料科学
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环境科学
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能源化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Li Wang,Junli Wang,Xuanbing Wang,Min Li,Jinlong Wei,Nianxiang Hu,Ruidong Xu,Linjing Yang
Low-cost and high-efficiency electrocatalysts produced by constructing the interfacial heterostructure have attracted more attention in oxygen evolution reaction (OER). Herein, we synthesize a three-dimensional (3D) heterogeneous structure of Ni x Co y Se 2 nanospheres loaded onto NiFe hydroxide (NiFe-LDH) nanosheets via bare nickel foam (NF) two-step electrodeposition. The optimal NiFe-LDH@Ni x Co y Se 2 /NF nanosheets heterojunction electrocatalyst is verified with an excellent OER performance in 1.0 M KOH solution, which only requires a low overpotential of 265.5 mV and 297.8 mV to drive high current density of 100 mA cm −2 and 500 mA cm −2 , respectively, long-term durability of more than 60 h at 100 mA cm −2 , and an extremely low Tafel slope of 57.5 mV dec −1 . Meanwhile, due to the dramatic improvement in OER performance, there is an enhancement in the overall water-splitting activity of the NiFe-LDH@Ni x Co y Se 2 /NF nanosheets heterojunction, attaining a current density of 20 mA cm −2 at the low cell voltage of 1.65 V. As a result, it shows the importance of constructing highly efficient OER catalyst with the rational design of heterostructures. The enhanced catalytic performance can be attributed to the large exposed electrocatalytic active sites accessible and constructed an efficient electronic transmission channel by eliminating contact resistance.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Journal of Central South University
·
2024
·Vol. 31
·期 4
·1292-1305
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IF 3.7
Hou Jin-feng,Sun Qian,Hao Xiu-zhen
Heavy metal composite pollution is becoming increasingly serious. In this study, CaAl-layered double hydroxide (CaAl-LDH) was prepared using the facile co-precipitating method, and was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). Lead(II), Cd(II), and As(V) were selected as the representative heavy metals to evaluate the adsorption capability of the synthesized CaAl-LDH by the batch experiments. The maximal adsorption capability of CaAl-LDH for Pb(II), Cd(II), and As(V) was 786.6, 437.2 and 72.9 mg/g, respectively. The adsorption mechanism of Pb, Cd and As may be surface precipitation, isomorphic substitution and ion exchange within the interlayer spaces of LDH, respectively. In conclusion, this experiment provides a LDH material with fast and efficient adsorption performance for both anionic and cationic metals, indicating its potential for practical application in the remediation of heavy metal composite pollution.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2023
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IF 3
Sundaraperumal Kanniga Devi,Vediyappan Thirumal,A. Balamurugan,Balakrishna Avula,Uma Devi Pongiya,Jinho Kim,Chinnasamy Surya
In a hydrothermal process, the NiCoMn(OH) 6 (NiCoMn-LDH) was synthesized. Tetracycline (TC) degradation being exposed to visible light provided an evaluation of the photocatalytic performance of the catalysts as prepared. About 96% of the TC was removed at its maximum by the NiCoMn-LDH that was employed. The NiCoMn-LDH performed better at degrading materials than Mn 2 O 3 performed. Discussions were held regarding the potential photocatalytic degradation mechanism.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 3
·2572-2584
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IF 2.195
Hu Fengxian,Cui Entian,Liu Hongxia,Wu Jing,Dai Yong,Yu Guiyun
Series of Bi 2 MoO 6 /NiAl-LDH hetero-junction photocatalysts were synthesized by a two-step hydrothermal method with a self-assembled process. It indicated that the in-situ intercalated NiAl-LDH showed a tight contact with Bi 2 MoO 6 layers and thus exhibited the rapid transfer of photogenerated electrons on the interface. The photocatalytic performance was evaluated by the degradation of rhodamine B (RhB) under visible light irradiation. The resulted Bi 2 MoO 6 /NiAl-LDH sample showed a higher visible-light photocatalytic activity for the degradation of RhB than any single component. The optimal LDH content in Bi 2 MoO 6 /NiAl-LDH is 15% with the degradation efficiency for more than 90% during 60 min. The excessive amount of NiAl-LDH in Bi 2 MoO 6 /NiAl-LDH could reduce the light absorption efficiency of Bi 2 MoO 6 and thus affected the generation of photoinduced electron–hole pairs. The enhanced photocatalytic activity and stability of Bi 2 MoO 6 /NiAl-LDH was attributed to the synergistic effects of the introduction of narrow band-gap NiAl-LDH and the construction of layered hetero-junction. Our synthetic method of self-assembly sheets has certain guided significance for the synthesis and application of other photocatalysts.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Yafeng Chen,Heliang Yao,Fantao Kong,Han Tian,Ge Meng,Shuize Wang,Xinping Mao,Xiangzhi Cui,Xinmei Hou,Jianlin Shi
Oxygen evolution reaction (OER) is a pivotal electrochemical reaction process for many renewable energy technologies. Due to the sluggish OER kinetics, searching for efficient low-cost non-precious metal catalysts is one of the crucial but very challenging steps. Herein, V 2 C MXene synergistically coupled with hypophosphite-intercalated FeNi (oxy)hydroxide (H 2 PO 2 − /FeNi-LDH-V 2 C) electrocatalyst is synthesized. The H 2 PO 2 − /FeNi-LDH-V 2 C exhibits excellent OER performance with an overpotential of 250 mV (η 10 ) and small Tafel slope of 46.5 mV dec −1 in 1.0 M KOH electrolyte, and excellent rechargeable Zn-air battery performance with superior open circuit potential (1.42 eV), power density (137 mW cm −2 ) and well durability. The strong interaction and electronic coupling with prominent charge-transfer between FeNi-LDHs and V 2 C MXene endow the composite significant OER performance and structural stability, and the adsorption/desorption balance for the OER reaction pathway, eventually promoting the intrinsic activity. This work demonstrates the great promise of MXene-based nanohybrids as advanced electrocatalysts for renewable energy applications.
研究领域:
材料科学
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电化学
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可再生能源
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产品关联
DOI
高影响因子
Batteries-Basel
·
2024
·Vol. 10
·期 7
·230
·
IF 4.6
Qi He,Xiang Wu
Ni3S2is a kind of transition metal sulfide (TMD) with excellent electrical conductivity and electrochemical activity. To further enhance the specific capacity of Ni3S2-based supercapacitors, we synthesize several nanosheet-decorated Ni3S2@NiMo-LDH nanostructures by a combination of hydrothermal and electrodeposition processes. The mesoporous structure provides a large number of electroactive sites, which shortens the charge transfer distance and increases the specific surface area of electrode materials. The assembled asymmetric supercapacitor shows an energy density of 62.8 W h kg−1at 2701.6 W kg−1and long-term cycling stability.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2017
·
IF 0
Yanping Zhu,Minwang Laipan,Runliang Zhu,Tianyuan Xu,Jing Liu,Jianxi Zhu,Yunfei Xi,Gangqiang Zhu,Hongping He
A novel and efficient photocatalyst was synthesized by surface hybridizing Zn/Ti-LDH (LDH) with C60 molecules. The structural characteristics of the resulting products (C60/LDH) were studied using a variety of characterization methods, and the photocatalytic activities of C60/LDH were tested using Orange II (OII) as a model contaminant under simulated solar irradiation. The FT-IR spectra showed that the characteristic mode of C60 at 1182 cm −1 split into two peaks at approximately 1240 and 1156 cm −1 ; in addition, the Raman spectra showed the band at 1422 cm −1 for C60 was upshifted to 1431 cm −1 with the increased doping amount of C60. In addition, the XPS spectra revealed that the peaks of O1s, Zn 2p, and Ti 2p were downshifted slightly. These results demonstrated that chemical interaction existed between C60 and LDH on C60/LDH. The UV–vis diffuse reflectance spectra confirmed that the absorbance of C60/LDH in visible-light region enhanced markedly, as compared with that of pristine LDH. The photoluminescence (PL) spectroscopic measurement revealed that the C60/LDH composites exhibited much weaker PL intensity than that of LDH sample, and the transient photocurrent ( I – V ) analysis showed that C60/LDH had higher photocurrent density than pristine LDH. The results of PL spectra and I–V analysis suggested that C60 molecule could effectively transfer the photoelectrons from the conduction band of LDH, leading to a lower recombination rate of the photo-induced electrons and holes. The photocatalytic experiments showed that C60/LDH had much higher photocatalytic activity in the decolorization of OII than that of pristine LDH, and 2%C60/LDH composite exhibited the highest photocatalytic activity. Furthermore, the stability test indicated that the decolorization efficiency of OII by 2%C60/LDH was still quite efficient after being used for 5 cycles.
研究领域:
材料科学
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环境科学
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产品关联
DOI
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Atian Xie,Jiuyun Cui,Jin Yang,Chunxiang Li,Yi Wang,Jiangdong Dai
The effective treatment of oily wastewater is of great significance for the protection of the ecological environment and human health. Aiming to prepare a membrane with excellent antifouling properties, a new active antifouling carbon cloth@Ni-Co LDH/Ag (CC@LDH/Ag) membrane was reported here via in situ hydrothermal growth and followed photo-deposition methods. The effects of Ag deposition on self-cleaning ability and surface wettability of CC@LDH/Ag membrane were studied. The experimental results showed CC@LDH/Ag membrane is superhydrophilic/underwater superoleophobic, and exhibited high separation efficiency (>98.6%) and high flux (6551–22,050 L m −2 h −1 ) for different kinds of oil/water mixtures. Moreover, CC@LDH/Ag membrane also displayed excellent environmental and mechanical durability. Good self-cleaning ability enabled CC@LDH/Ag membrane to be separated at least 30 times, and still maintained high separation performance. The self-cleaning CC@LDH/Ag membrane may hold great application prospects in oily wastewater remediation.
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
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Xinyu Liu,Jing Xu,Lijun Ma,Ye Liu,Linying Hu
The research work of photocatalytic decomposition of water to produce hydrogen is wider and wider. A highly efficient composites photocatalyst was prepared by hydrothermal method. The composite photocatalyst was composed of spherical CoS x and layered nanosheets of MgAl-LDH. The composite photocatalyst retained the advantage of a wide range of visible light absorption, and can effectively prevent the photocorrosion phenomenon caused by sulfide. The hydrogen production of composite photocatalyst was 262.5 μmol. Compared with MgAl-LDH and CoS x , there was a significant improvement. The combination of the two accelerated the separation of photogenerated electrons and holes, which made the hydrogen production effect of the composite catalyst obvious. To investigate the stability of the composite catalyst, a cycle test was carried out and it showed good stability during the test. According to PL, XPS, XRD, TEM, SEM, UV–Vis DRS and electrochemical characterization, the possible reaction mechanism was proposed. A high performance photocatalyst for hydrogen production with low cost MgAl-LDH combined with CoS x had been explored, which provided a convenient way for research work.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 1
·228-238
·
IF 3.591
Xinyu Liu,Jing Xu,Lijun Ma,Ye Liu,Linying Hu
The construction of heterojunctions can effectively improve the electron transport rate and photocatalytic activity. In this work, nanoflower-like S-scheme heterojunction MoS2/NiAl-LDH was successfully synthesized. The results indicated that the hydrogen yield of the MoS2/NiAl-LDH composite catalyst reached 229.5 μmol in 5 hours under visible light irradiation by adjusting the pH value of the sacrificial agent and the amount of eosin. The crystal structure and morphological characteristics of the composite were analyzed by XRD, SEM and TEM. The visible light response degree and charge separation and transfer rates of photogenerated carriers of the composite were analyzed by UV-Vis DRS, PL and electrochemistry. The electronic transfer path was also analyzed by XPS. The construction of S-scheme heterojunctions can realize effective separation of electron–hole pairs and ensure that the photo-induced carriers with the strongest redox ability can be retained to participate in the photocatalytic reaction. In addition, the feasible mechanism of photocatalytic hydrogen evolution is given. This work will provide different insights into the enhancement of hydrogen evolution by heterojunctions formed by binary semiconductors.
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
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Guoqiang Liu,Cheng Huang,Zeheng Yang,Jianhui Su,Weixin Zhang
Water electrolysis has been widely considered as a promising technique for generating hydrogen. However, oxygen evolution reaction (OER) as a sluggish anodic reaction, usually suffers from high overpotential, which greatly impedes the efficiency of hydrogen generation. Herein, we report an ultrathin NiMn-LDH/CFC growth on commercial carbon fiber cloth (U-NiMn-LDH/CFC) substrate through a facile hydrothermal method. The U-NiMn-LDH/CFC can be successfully used to assemble an energy-saving water splitting system via integrating anodic urea oxidation reaction (UOR) and hydrogen evolution reaction (HER). The as-prepared U-NiMn-LDH/CFC nanosheets with ultrathin structure exhibit reliable electrocatalytic activities toward UOR (1.351 V vs. RHE@20 mA cm −2 ) and HER (169 mV@10 mA cm −2 ). A two-electrode water splitting cell is further constructed and delivers almost 210 mV lower oxidation potential at 10 mA cm −2 with containing (1.0 M KOH) 0.5 M urea in comparison to that in pure overall water splitting. Furthermore, the above two-electrode system shows excellent electrolysis stability.
研究领域:
材料科学
·
能源化学
·
催化化学
✓ 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）