NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 9
·6735-6741
·
IF 3.201
Xiaodong Sun,Xin Yuan,Xiaopeng Li,Ling Li,Qingfeng Song,Xuliang Lv,Guangxin Gu,Mingxu Sui
In this study, hollow cube-like CuS composites derived from Cu2O crystals were synthesized via a simple one-step reaction. The formation of hollow cavities can be explained through the Kirkendall-based process. The morphologies and electromagnetic absorption (EA) properties of the CuS were measured and investigated. A sample with 35 wt% hollow CuS loading paraffin-composite achieves an optimal reflection loss (RL) of −63.99 dB at 12.09 GHz under the thickness of 2.25 mm. Simultaneously, the effective EA bandwidth (RL ≤ −10 dB) can be tuned between 4.63 and 18.00 GHz by changing the thickness of the absorber from 1.5 mm to 4.0 mm. The excellent EA performance is attributed to the high dielectric loss, appropriate impedance matching and multiple reflections induced by the unique hollow cube-like structure. Thus the hollow cube-like CuS is expected to be a promising material in approaching for microwave absorption against the electromagnetic pollution.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tingting Yang,Bin Wang,Xingwang Yan,Gaopeng Liu,Junze Zhao,Mengxia Ji,Paul K. Chu,Jiexiang Xia,Huaming Li
Semiconductor photocatalysis technology is a promising technique for the environmental remediation and new energy development. It is of importance to design the photocatalysts with wide spectral response, high carrier separation efficiency and high redox capacity for the photocatalysis. Herein, a CuS/In 2 S 3 Z-scheme heterojunction is designed and constructed by a one-step hydrothermal method. UPS, free radicals trapping experiments and ESR confirm that the electrons are transferred from CuS to In 2 S 3 through the Z-Scheme mechanism. Benefiting from the construction of Z-scheme heterostructure, the separation of photogenerated carriers is more effective and the redox capacity of the pristine materials reserves the maximum. Compared to pure CuS and In 2 S 3 , CuS/ In 2 S 3 -4 represents the best photocatalytic performance boosting degradation rates of MBT that are 28.1 and 21.7 times higher than this of the CuS and In 2 S 3 , respectively. In the photocatalytic process, ·O 2 - and h + are the main active species. Bean sprout planting experiment showed that the toxicity of the solution decreased after degradation. This work provides a new method of constructing a high-performance Z-scheme heterojunction material for improving the activity and efficiency of the photocatalysts.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 1
·1-12
·
IF 2.8
Liang Xuan,Xue Suting,Wu Wangchen,Feng Qin,Zheng Xudong,Zhang Yakang,Xu Song,Zhou Man,Li Zhongyu
Herein, a series of CuS particles anchored three-dimensional ordered macroporous TiO 2 (CuS/3DOM-TiO 2 ) composites were fabricated by a biocompatible and environmental-friendly biomolecule-assisted route. For the first time in the macroporous 3DOM-TiO 2 , L-cysteine acted as multiple roles including sulfur source and chelating agent for anchoring of CuS particles. During the regulation by Cu/Ti molar ratios from 0.3 to 2, the average size of CuS particle which anchored on inner surface of 3DOM-TiO 2 was well-controlled from about 50 to 20 nm. The photocatalytic activities were investigated by visible-light degradation of methylene blue (MB). The highest activity of CuS/3DOM-TiO 2 was emerged when Cu/Ti equaled to 1. This optimized CuS/3DOM-TiO 2 -1 reached 99% in 180 min, which was 60% higher than that of pure TiO 2 . After four cycles, the photocatalytic activity of CuS/3DOM-TiO 2 retains more than 80% of its original performance. L-cysteine highly promoted the adhesion between CuS and TiO 2 which provided good cycling ability.
研究领域:
材料科学
·
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2025
·
IF 3.6
Yueqin Zhao,Yuxin Sun,Liuyun Chen,Xianjun Yang,Pengfei Yang,Xinling Xie,Zuzeng Qin,Hongbing Ji,Tongming Su
Photocatalytic hydrogen production from water splitting is a promising technology for overcoming energy and environmental issues. Herein, Mn 0.4 Cd 0.6 S/CuS composites were constructed for photocatalytic hydrogen production. The amount of CuS is optimized, and the composition and structure of the Mn 0.4 Cd 0.6 S/CuS composite are investigated via various characterization techniques. The formation of a p–n heterojunction between Mn 0.4 Cd 0.6 S and CuS and the built-in electric field improve the separation efficiency of photogenerated electrons and holes and enhance the performance of photocatalytic hydrogen production. When the content of CuS is 5 wt%, Mn 0.4 Cd 0.6 S/5CuS presents the best photocatalytic hydrogen production rate of 22.10 mmol h −1 g −1 , which is 3.0 times greater than that of Mn 0.4 Cd 0.6 S, and the apparent quantum yield reaches 7.82% at 400 nm. Combined with the activity test and characterization results, the reaction mechanism of photocatalytic hydrogen production over the Mn 0.4 Cd 0.6 S/CuS composite is proposed.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 3
·266
·
IF 4
Lei Yang,Lihui Wang,Han Xiao,Di Luo,Jiangzhi Zi,Guisheng Li,Zichao Lian
The efficient separation of photo-generated electrons and holes is significantly importance for enhancing photocatalytic performance. However, there are few reports on precisely constructing interfaces within a single nanocrystal to investigate the mechanism of photoinduced carrier transfer. In this study, nanorod heterodimer-structured CuS/ZnxCd1−xS heteronanocrystals (CuS/ZnCdS HNCs) were successfully synthesized as a typical model to explore the photoinduced carrier dynamics in the photocatalytic hydrogen evolution reaction (HER). The CuS/ZnCdS HNCs exhibited a photocatalytic hydrogen evolution activity of 146 mmol h⁻1g⁻1under visible light irradiation, which is higher than most reported values. Moreover, after 15 h of hydrogen production cycling tests, we found that the material maintained high hydrogen production performance, indicating excellent stability. The CuS/ZnCdS HNCs achieved an apparent quantum yield (AQY) of 69.2% at 380 nm, which is the highest value reported so far for ZnCdS- or CuS-based photocatalysts. The remarkable activity and stability of the CuS/ZnCdS HNCs were attributed to the strong internal electric field (IEF) and Z-scheme mechanism, which facilitate efficient charge separation, as demonstrated by in situ X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses. This discovery provides a new approach for constructing Z-scheme heterogeneous copper-based nanocomposites within nanocrystals and offers guidance for improving photocatalytic activity.
研究领域:
材料科学
·
光催化
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2018
·
IF 0
Zequn Yang,Hailong Li,Chen Liao,Jiexia Zhao,Shihao Feng,Pu Li,Xi Liu,Jianping Yang,Kaimin Shih
Rattle-type Fe3O4@CuS synthesized using a two-step method was applied for elemental mercury (Hg0) adsorption in coal combustion flue gas for the first time. The Fe3O4 with strong magnetization was an ideal candidate as a core to make the sorbent recyclable, while the stabilized ultrathin CuS shell assured that the Fe3O4@CuS had a higher Brunauer–Emmett–Teller (BET) surface area with more exposed active sites and stronger magnetization. The optimal operating temperature of 75 °C allowed for the injection of the sorbent between the wet desulfurization (WFGD) and wet electrostatic precipitator (WESP), which removed the detrimental influence of nitrogen oxides. Simulated flue gas (SFG) in this section showed a slight inhibitive effect on Hg0 adsorption over the Fe3O4@CuS, mainly due to the presence of water vapor (H2O). The inhibition of H2O was proven to be the result of an active site prevention effect instead of the widely recognized competitive adsorption effect. The adsorption capacity and rate of the Fe3O4@CuS for Hg0 capture reached 80.73 mg g–1 and 13.22 μg (g min)−1, which were the highest values among the magnetic sorbents currently reported for Hg0 removal from coal combustion flue gas. These properties allowed the sorbent to maintain a 100% Hg0 capture efficiency for more than 20 h with only a 50 mg dosage when no regeneration step was applied. Meanwhile, the contacting time between the sorbent and Hg0 was generally less than 5 s in a typical sorbent injection process. Polysulfides dominated the capturing process and primarily contributed to the extremely high adsorption capacity/rate. A multistep reaction mechanism was proposed to explain the Hg0 adsorption over Fe3O4@CuS. At the first stage, polysulfide participated in Hg0 adsorption as the most active component and was consumed rapidly. After that, S–S dimers, sulfides, and even copper-terminated sites functioned as the adsorption centers. The as-formed mercury–copper (Hg–Cu) amalgam was transformed into mercury sulfide (HgS), a process that was dependent on the extent of the saturation of sulfide sites. With these advantages, Fe3O4@CuS is a promising, cost-effective, highly recyclable, and efficient alternative to the traditional activated carbon for capturing Hg0 in coal combustion flue gases.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Liangfeng Luo,Yidi Wang,Siping Huo,Peng Lv,Jun Fang,Yang Yang,Bin Fei
CuS/CdS(H)/CdS(C) photocatalysts were synthesized via the hydrothermal method by employing thiourea , Cd(CH 3 COO) 2 ·3H 2 O and copper 1,4-benzenedicarboxylate MOF (CuBDC). The photocatalysts were characterized by XRD , XPS , BET, TEM and UV–vis diffuse reflectance spectra. Interestingly, hexagonal CdS (CdS(H)) and cubic CdS (CdS(C)) were formed with phase junctions in one step when CuBDC was introduced in the synthesis process, in addition, CuS nanoparticles were deposited on CdS. However, only hexagonal CdS was obtained without CuBDC. It demonstrated that CuBDC was not only the precursor of CuS but also the structural modifier for CdS. With the reduction of re-combination of photo-induced electrons and holes caused by phase junctions and the enhancement of visible-light absorptions due to the loading of CuS, all CuS/CdS(H)/CdS(C) photocatalysts had higher photocurrent densities under visible-light irradiation, and consequently the higher rates of H 2 production than pure CdS(H). Typically, the catalyst with 2.89 wt% of Cu showed a highest rate of H 2 evolution at 2042 μmol/g/h.
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
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 29
·13963-13970
·
IF 3.925
Pengli Li,Min Wang,Mingzhe Jiang,Wenjing Lai,Jiajia Li,Kailin Liu,Hongling Li,Chenglin Hong
The early detection of tumour markers is essential for the timely treatment of cancer, and thus realising the sensitive detection of carcinoembryonic antigen (CEA) is significant. Herein, we employed an electrochemical immunosensor as a simple analytical method. The loading of precious metals significantly amplifies the signal of electrochemical immunosensors. In this study, the successful loading of Au NPs was achieved via the galvanic displacement method. Moreover, CuS nanoflowers possessed intrinsic peroxidase-like activity, which could catalyse the oxidation of o-phenylenediamine (OPD) to generate a light-orange product in the presence of hydrogen peroxide (H2O2). The flower-shaped CuS not only provided active sites for the catalytic reaction, but also possessed a large specific surface area, which could provide abundant sites for the placement of Au nanoparticles. Thus, it was suitable for the labelling of Ab2 for the sensitive detection of CEA. The instant current response (i–t) method detected CEA quantitatively, and the immunosensor prepared under the optimized conditions exhibited an excellent analytical performance. The detection range of the sensor prepared in this study was 0.1–80 ng mL−1 and its detection limit was 5.5 pg mL−1 (S/N = 3).
研究领域:
生物传感器
·
纳米技术
·
癌症诊断
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Chenxi Han,Youquan Li,Yibing Chen,Jin Zhang,Zijun Zhang,Yuqiu Ke,Jun Xiong,Linghui Yu,Ming Li
Interfacial solar desalination generation (ISDG) presents a promising solution for obtaining freshwater from seawater. However, developing solar evaporators with robust salt resistance using simple methods to ensure consistent desalination performance remains a major challenge. In this study, we engineered a solar evaporator (CuS-PDA-PVAF) by modifying polyvinyl alcohol foam (PVAF) with polydopamine (PDA) and CuS using a straightforward solution immersion method. The incorporation of PDA and CuS enhances the sunlight absorption capability of PVAF to approximately 98 %, resulting in an evaporation rate of 1.44 kg m –2 h –1 under 1-solar intensity. The CuS-PDA-PVAF solar evaporator leverages the macroporous structure and excellent hydrophilicity, enabling it to withstand 15 wt% saltwater while maintaining a steady evaporation rate of about 1.17 kg m –2 h –1 . Outdoor tests confirm that a 1 m 2 CuS-PDA-PVAF can generate approximately 5.6 kg of freshwater daily. This solar evaporator, designed simply and resistant to salt, possesses substantial potential for alleviating freshwater scarcity.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
C. Wang,S. Wei,Q. Zhu,X.B. Yang,B. Zhou,Z.Q. Duan,Z.X. Xie,Y.M. Hu
Copper sulfide (CuS) is a one of the ideal electrode materials for supercapacitors (SCs) due to the abundant raw materials, easy preparation and low cost. However, low conductivity and poor stability of the CuS electrodes plague their practical applications. Aiming at performances improvement of CuS based electrodes, a strategy to stimulate synergistic effect between CuS and carbon was developed. Composites containing activated nitrogen self-doped porous carbon (ANPC) and petaloid CuS nanocrystalline were prepared and studied as electrodes for SCs. The ANPC@CuS hybrid electrode achieved a maximum specific capacity of 1112.92 F g −1 at 1 A g −1 which is 3.5 times that of CuS electrode. Meanwhile, 97.97 % capacity retention after 10,000 cycles at 10 A g −1 was gained. Asymmetric hybrid supercapacitor (HSC) with the ANPC@CuS electrode exhibited a maximum energy density of 29.84 Wh kg −1 at 491.19 W kg −1 , and great cycling stability with 91.62 % capacity retention after 5000 constant current charge-discharge cycles at 10 A g −1 . This work provides an effective approach to stimulate synergistic effect of hybrid electrodes for high-performance SCs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Mei-Xia Zhao,Ning Yang,Heng-Shen Xie,Zheng Yang,Mao-Yan An,Juan Liu,Dong-Qin Guo,Xian-Yong Wei
Solar driven water splitting is a mild and clear H 2 generation process, but low efficiency renders it far away from application. Heterostructure construction provides a promising solution; however, constructing a well-defined, efficient, and low-cost heterostructure is still a challenge but of great importance. Here, we report a hierarchical heterostructures composed by CuS/CdS 2D nanosheets, which was synthesized by using a facile in-situ cation-exchange method. The unique properties of intimate interfaces and widened-and-shorted charge transfer paths for CuS/CdS 2D heterostructures synergistically improve charge transfer and separation. Besides, the enhanced light absorption caused by localized surface plasmon resonance of CuS provides more electrons to attend the reaction of H + reduction into H 2 . Owing to those merits endowed by CuS/CdS heterostructures, the activity of photocatalytic H 2 evolution reaction (HER) was significantly boosted with optimized H 2 generation rate of 21.5 mmol g −1 h −1 which exceeds that of pristine CdS by more than 13 folds.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Lan Long,Yaqin Zhu,Chunmei Zhang,Kunming Liu,Shaohua Jiang
The absorption performance of broadband electromagnetic waves is of utmost importance in safeguarding diverse electronic equipment against electromagnetic wave pollution, necessitating materials with low density, thin thickness, and cost-effectiveness to be employed. This study presents the successful synthesis of biomass-derived carbon (BC) composites via the hydrothermal method, utilizing moss coated with flower-like CuS. The CuS was uniformly dispersed on BC matrix, contribute to dipole polarization relaxation. The formation of heterogeneous interfaces between CuS and the BC phase resulted in significant polarization loss. Additionally, the wrinkled BC and flower like CuS constructed by nanosheets boosted scattering of electromagnetic wave due to its large specific surface area, which can provide additional channels for charge transfer and avail dissipation of electromagnetic wave energy. With an efficient absorption bandwidth (EAB) that encompasses the whole X band, the electromagnetic waves absorption (EMA) performance of CuS/BC composites was able to reach a minimum reflection loss of − 28.8 dB.
研究领域:
材料科学
·
电磁学
✓ 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）