CHINESE JOURNAL OF CATALYSIS
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2015
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IF 1.964
Tao Wu,Jingwei Wan,Xuebing Ma
Magnetic solid acid catalysts SO 4 2− /Zr(OH) 4 –Fe 3 O 4 were prepared using magnetic Fe 3 O 4 nanoparticles , ZrOCl 2 ·8H 2 O, and sulfuric acid as starting materials in the calcination temperature range 110–650 °C. The properties of the magnetic solid acid, such as loaded SO 4 2− content, acid distribution, surface morphology, and porous structure, were characterized. In the aqueous asymmetric aldol reaction of various benzaldehydes with strong electron-withdrawing groups (R = NO 2 and CN), good to excellent catalytic performance (83%–100% yield, 86.0%–95.6% ee anti , and anti/syn = 88–96/12–4) was achieved. These nanomagnetic solid acids can be quantitatively recycled from the reaction mixture using an external magnet and reused five times without significant loss of catalytic activity.
研究领域:
化学
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材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jie Liu,Tongxu Gu,Rui sun,Jiaojiao Sun,Jian Yin,Pengli Bai,Huancai Yin
Classical gold nanoparticle-based colorimetric immunochromatographic assay (ICA) exhibits moderate performance, limiting their application in trace detection. In this study, perovskite-MSN nanocomposites with high quantum yield (74.7 %), a narrow full width at half maximum (29.5 nm) and excellent water stability were synthesized using in situ crystallization growth and a water-assisted strategy. Carboxyl-modified perovskite-MSN nanocomposites were employed to label anti-gliadin monoclonal antibody (mAb) and construct dual-mode fluorescent ICA (FICA) for determination of gliadin in milk and beef samples. Compared to the traditional AuNP-based colorimetric ICA strips, the CsM-H-based FICA demonstrated improved sensitivity, with a limit of detection (LOD) of 3.62 ng/mL in quantitative analysis. The CsM-H-based FICA strips exhibited average recoveries ranging from 90.2 % to 110.0 %, with coefficients of variation (CVs) between 3.3 % and 7.4 % for milk and beef samples. The ultra-stable perovskite-MSN nanocomposites provided the FICA strip with excellent stability, enabling storage for up to six months at room temperature. This study highlights the advantages of CsM-H-based FICA, including its rapidity, simplicity, and cost-effectiveness, as a promising POCT biosensor.
研究领域:
材料科学
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分析化学
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医学诊断
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2017
·Vol. 7
·期 79
·50358-50366
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IF 3.108
Yue Wang,Xianfeng Zhang,Xin Li,Yang Liu,Xiaoping Wang,Xi Liu,Jian Xu,Yongwang Li,Yongguang Liu,Hang Wei,Peng Jiang,Minghui Liang
Iron oxide nanoparticles intercalated in Ni(OH)2 nanosheets were prepared in a spontaneous way for the cathode materials of asymmetric supercapacitors. The soluble precursor of Ni(OH)2, Ni(NH3)6(OH)2, was used for growth on α-Fe2O3 nanoparticles. The loading percentages of Ni(OH)2 in the Ni(OH)2–α-Fe2O3 nanocomposites had a great influence on the morphology and size of Ni(OH)2. The composites were characterized by TEM, SEM, ICP-OES, XRD and XPS. The specific capacitance of Ni(OH)2 in the composite can reach 1107 F g−1 at a scan rate of 20 mV s−1, and the specific capacitance of the Ni(OH)2–α-Fe2O3 composite can be up to 376 F g−1 at a scan rate of 5 mV s−1. More importantly, the fabricated Ni(OH)2–α-Fe2O3//AC (activated carbon) asymmetric supercapacitor exhibited energy density and power density of 31.6 W h Kg−1 and 474 W Kg−1, respectively. The cycling performance of the asymmetric supercapacitor was also excellent, and the capacitance retention reached 89.6% after 5000 charge–discharge cycles. Red, blue and yellow LED lights can be lit up with two series of asymmetric supercapacitors, revealing their potential application in energy storage.
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
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Hui-Min Zhao,Wei-Peng Jia,Rui Dang,Xiang-Rong Ma,Yang Ma,Shuang-Yu Li,Xin Han,Nai-Cai Xu,Yu-Hong Kang,Yong Gao,Hua-Rui Hao,Rui Bai,Zhi-Fang Zhang,Cui-Ying Lu
s The development of a new type of photocatalyst for multiple deep degradation of phenol in wastewater together with the elucidation of the method for this process are highly significant in the treatment of sewage. In this report, three-dimensional heterostructured La(OH)CO 3 /NiAl-LDHs composite catalysts were prepared by loading ultrathin NiAl-LDHs onto La(OH)CO 3 substrates using a hydrothermal synthesis method and an in-situ growth technique. Photocatalytic experimental studies showed that La(OH)CO 3 /NiAl-LDHs could remove up to 97 % of (degrade) phenol from water, which was 5.86 and nearly two-fold greater than pure NiAl-LDHs and La(OH)CO 3 . Even after 5 cycles, La(OH)CO 3 /NiAl-LDHs still sustains an excellent photocatalytic stability (93.6 % phenol degradation). Fabrication of ultrathin NiAl-LDHs greatly enhanced the surface expanse of the composites from 1.442 m 2 /g to 140.16 m 2 /g, exposing more active sites. According to the in-situ XPS analysis under irradiation and the capture of active species on La(OH)CO 3 /NiAl-LDHs, the electrons would be transferred from La(OH)CO 3 to ultrathin NiAl-LDHs. The S-type heterointerfaces formed at the La(OH)CO 3 substrate with ultrathin NiAl-LDHs nanosheets effectively inhibited carrier complexation and improved the catalytic performance. Meanwhile, the formation of oxygen vacancies between La(OH)CO 3 and NiAl-LDHs further enhanced the photocatalytic activity. The photocatalytic degradation mechanism of phenol showed that the main radicals of this catalytic reaction were •O 2 - and •OH. The three-dimensional stratified staging engaged with La(OH)CO 3 and the ultrathin NiAl-LDHs mixed nanosheet faces offered a new path to advance superlative catalysts to treat sewage.
研究领域:
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
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Yan-nan Wang,Jin Li,Zhenyu Yuan,Fanli Meng
An optical fiber toluene gas sensor working at room temperature is proposed based on CQDs@SiO 2 (-OH) porous film. The CQDs@SiO 2 (-OH) porous film was elaborated on the surface of the hollow core fiber (HCF) using the templating method, where the evanescent field is excited by a misaligned structure. The precursor solution formed by mixing CQDs with SiO 2 (-OH) enhances CQDs dispersion within the film, preventing aggregation and preserving active sites. Experimental results indicate that the gas-sensitive layer doped with CQDs demonstrates a sensitivity of 5.1 pm/ppm to toluene gas at room temperature, which is approximately 3.13 times greater than that of the SiO 2 (-OH) porous film. Additionally, it demonstrates a response time of 12 s and a limit of detection (LOD) of 3.9 ppm. The gas sensing mechanism is thoroughly investigated using DFT, exploring the electronic distribution of the gas-sensitive layer before and after CQDs doping and analyzing the sensitization mechanism. This study presents a novel approach for toluene gas detection at room temperature using an optical fiber sensor.
研究领域:
化学传感器
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材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
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IF 5.7
Hele Hua,Nan Zhang,Zhidan Wang,Rui Li,Yunfang Wang,Jianxin Liu,Peide Han,Caimei Fan,Yawen Wang
Electrocatalytic NO 3 − reduction reaction (NO 3 RR) has attracted much attention as a promising NH 3 synthesis pathway, and Cu-based catalysts have been proven to lead to advantages in nitrate reduction . However, the active hydrogen (H*) produced by the Cu-based catalyst is insufficient to satisfy the hydrogenation process of the NO 3 RR intermediate, resulting in a large generation of NO 2 − . In this paper, the Co(OH) 2 /Cu 2 O heterojunction was constructed to improve the kinetics of H 2 O dissociation to generate H* and Co(OH) 2 /Cu 2 O (5.87 %) showed lower faradaic efficiency (FE) of NO 2 − than Cu 2 O (50.95 %). Mechanistic studies reveal that the introduction of Co(OH) 2 can help Cu 2 O lower the energy barrier of H 2 O dissociation, greatly boosting the supply of active hydrogen (H*). Not only that, but the reaction energy barriers of *NO to *NOH can be greatly reduced. The final twofold reason works together to greatly improve the efficiency of hydrogenation of NO 2 − , largely solving the problem of FE reduction due to the delayed consumption of NO 2 − , thus realizing improved performance.
研究领域:
化学
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材料科学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
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IF 4.331
Yafeng Wang,Xian Luo,Wenjie Lu,Bin Huang,Yanqing Yang
In this study, β-Ni(OH)2 with a unique flower-like morphology was synthesized through a hydrothermal method. The doping of Rh in β-Ni(OH)2 was achieved by a reduction method. The as-synthesized catalysts were characterized by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy for the crystal structure, morphology, composition, and chemical state analysis. The electrochemical tests revealed that the doping of Rh can significantly increase the electrocatalytic performance of β-Ni(OH)2 in 1.0 M KOH solution. The methanol oxidation peak current density of Rh-doped β-Ni(OH)2 reached 95 mA cm–2 with a Tafel slope of 40 mV dec–1. The reason for these improvements is that Rh can suppress the phase transformation of NiOOH from β to α. Meanwhile, the electronic structure change of nickel in β-Ni(OH)2 and the defect ratio increase caused by Rh doping are beneficial to methanol oxidation reaction (MOR) catalytic activity. Furthermore, the synergistic effect between Rh and Ni(OH)2 improved the surface activity of β-NiOOH. The doping of Rh in β-Ni(OH)2 is initiative in this work, which provides a new strategy to design highly efficient and cost-effective MOR electrocatalysts for alkaline DMFCs.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Haijun Chen,Chunli Kang,Shiyi Zhao,Zhuowen Wang,Haiyang Liu,Deming Dong,Jiao Qu,Na Zheng,Xiuyi Hua
Ineffective separation of photo-carriers and slow photoreaction rates seriously limit the decontamination effectiveness of the photocatalyst. To overcome these limitations, herein, the oxygen vacancies modified Z-scheme Ag 3 PO 4 /FeSnO(OH) 5 heterojunction was designed with FeSnO(OH) 5 as a co-catalyst. In this photosystem, Ag 3 PO 4 and FeSnO(OH) 5 function as oxidation and reduction centers of Ag 3 PO 4 /FeSnO(OH) 5 photocatalysts, respectively. Importantly, oxygen vacancies in the Z-scheme heterojunction provide an effective charge transport pathway, which not only inhibits the photocorrosion of Ag 3 PO 4 but also reduces electron-hole recombination, significantly boosting the photocatalytic decontamination performance and long-term stability of the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst. Remarkably, the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst demonstrated outstanding photocatalytic performance, 100 % degrading indomethacin (IDM) under visible light in just 30 min through the main generation of h + that attacks the active atoms of IDM, prominently outperforming other counterparts. Besides, three principal degradation pathways were proposed, and the toxicity of the degradation products was significantly reduced. The Ag 3 PO 4 /FeSnO(OH) 5 exhibited high photocatalytic degradation efficacy across different qualities of water. This research offers an oxygen vacancy modified engineering combined with a Z-scheme heterojunction strategy for constructing extraordinary photocatalysts for environmental purification.
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
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 32
·15789-15796
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IF 9.931
Jiali Sheng,Jiahui Kang,Zhixiong Hu,Yan Yu,Xian-Zhu Fu,Rong Sun,Ching-Ping Wong
Exploring effective electrocatalysts is in urgent demand to boost their large-scale applications for direct ethanol fuel cells. Herein, for the first time, we report nanoparticle-assembled Pd nanocages with efficient catalytic activity towards ethanol electrochemical oxidation. The catalysts are prepared from the second template of a nanosheet surface of amorphous Co(OH)2 octahedral nanocages, which are prepared from the original template of octahedral Cu2O. These Pd octahedral nanocages exhibit a porous rough surface, which consists of smaller Pd nanoparticles, endowing them with highly active surface area and many active sites. For the electrochemical oxidation of ethanol, the Pd nanocages demonstrate superior activity (3765 mA mgPd−1), 4.8 times and 5.9 times those of commercial Pd/C and Pd nanocatalysts, respectively, prepared directly from an octahedral Cu2O original template. Furthermore, the Pd nanocages demonstrate excellent long-term durability.
研究领域:
材料科学
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电化学
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能源科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
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2024
·
IF 6.3
Hongwei Wang,Xianliang Ren,Fang Wu,Gaobin Liu,Shufang Zhang,Haijun Luo,Zhiqin Zheng,Liang Fang
MXenes have demonstrated exceptional potential in the adsorption of uranium (U(VI)) from wastewater. However, significant challenges remain in the investigation of its adsorption capacity and mechanism. To enhance the adsorption capacity of Ti 2 CT x , this study conducted alkalization experiments on Ti 2 CT x and subsequently prepared Ti 2 C(OH) 0.13 @SA aerogel spheres by combining alkalized Ti 2 C(OH) 0.13 with sodium alginate (SA). The results indicated that alkalization effectively increased the proportion of OH functional groups. After alkalization treatment, Ti 2 C(OH) 0.13 exhibits a significantly enhanced adsorption capacity, reaching up to 951 mg g −1 , which represents more than a twofold increase compared with untreated Ti 2 CT x . The adsorption follows pseudo-second-order kinetics and the Langmuir isotherm model, suggesting chemical and monolayer adsorption, respectively. Thermodynamic studies reveal an endothermic adsorption process. DFT calculations demonstrate that the OH functional group forms chemical bonds with U(VI), promoting reductive adsorption. Aside from electrostatic adsorption, XPS analysis confirms Ti(II) oxidation and U(VI) reduction. This study further investigates the adsorption capacity of Ti 2 C(OH) 0.13 @SA aerogel spheres in simulated seawater environments. It is found that even at an ultra-low concentration of U(VI) as low as 3.3 μg/L, these aerogel spheres still exhibit significant adsorption performance, with an adsorption capacity reaching up to 3.21 mg g −1 , highlighting their substantial potential for applications.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2025
·
IF 9.2
Dan Xu,Yuwei Hua,Yanyan Huang,Yiming Zhao,Xin Chen,Jingyuan Zhang,Ge Chen,Guangyang Liu,Zhijian Wu,Xiaomin Xu,Donghui Xu
The rapid industrialization and extensive use of synthetic dyes have led to significant environmental pollution, particularly through dye wastewater, which poses severe ecological risks. Conventional single treatment methods often struggle to effectively remove complex and stable dye molecules. In this study, we developed COF-based chitosan hydrogel microspheres by combining COF-LZU1 and Co(OH)₂ via co-precipitation and self-assembly techniques. The synergistic effect between COF and Co(OH)₂ enabled simultaneous adsorption and degradation of neutral red, significantly enhancing the adsorption capacity. Under optimal conditions (15 mg of composite material, 20 min reaction time, pH = 7), the composite exhibited an adsorption capacity of 1325.48 mg/g and a degradation efficiency of 100 %, surpassing the performance of most conventional adsorbents. Furthermore, the incorporation of Co(OH)₂ into COF enhanced the stability of the composite material, as indicated by thermodynamic analysis and adsorption performance across different component ratios. Adsorption process modeling revealed that the adsorption kinetics fit well with the Elovich model, while isothermal adsorption followed the Langmuir model. Among common interfering substances, CH₃COO − was found to enhance the catalytic process, whereas humic acid inhibited it. Quenching experiments and EPR analysis confirmed that superoxide anion radicals (•O₂ − ) and singlet oxygen ( 1 O₂) were the primary active species in the catalytic process, with hydroxyl radicals (•OH) playing a relatively minor role. This study highlights the synergistic interaction of COF and Co(OH)₂ in improving adsorption performance, stability, and catalytic efficiency, providing a novel strategy for the preparation of advanced composite materials and new insights into pollutant removal mechanisms.
研究领域:
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
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IF 4.175
Baolai Wang,Kaili Wei,Fuming Chen,Yinzhen Wang,Guannan He,Wei Li,Junming Liu,Qinyu He
It has been found it more difficult in completely degrading A-ring of tetracycline (TC) than completely degrading B-D rings of tetracycline. Thus, it is very necessary to find an effective route to completely degrading A-ring of tetracycline. In this work, a Z-scheme heterojuncted core-shell La(OH) 3 @BaTiO 3 composite (LB) was designed and fabricated through hydrothermal method . Many characterization techniques were employed to investigate the microstructure, phases, composition, energy band structure , and the lifetime of photogenerated carriers. In the mean time, the photocatalytic properties, including the degradation of A-ring and B-D rings of TC, as well as active species during photo-degradation were investigated. It is found that the as-prepared LB has an improved lifetime of photo-produced carriers, as well as high photocatalytic properties, being attributed to the core-shell structured heterojunction La(OH) 3 @BaTiO 3 . In addition, it is also found that ·O 2 − is more effective on degrading A-ring of TC than other active species, likely owed to the PKa3 value (3.3) of A-ring in TC. This work has supplied a route to completely degrading the A-ring of TC: rationally design and prepare a Z-scheme heterojuncted composites which supply very negative conduction band bottom potential.
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
危险品化学品经营许可证（带存储）