APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Guanqiong Li,Tong Xu,Ruifang He,Chunping Li,Jie Bai
Photocatalytic water splitting is a promising method to obtain clean hydrogen energy, and the corresponding catalyst has received extensive attention. Among them, cadmium sulfide (CdS) has a relatively narrow band gap (2.4 eV) and a high conduction band position. It can be considered to be a good visible light photocatalyst in response to visible light. However, its application is limited because the existence of rapid photo-electron-hole recombination and photo-corrosion. In this work, a series of hollow CdS tubes have been successfully prepared with the novel morphology via simple one-step solvo-thermal method. The as-prepared catalysts displayed great photocatalytic activity for photocatalytic split water product H 2 under light (λ ≥ 350 nm). Due to the presence of the solvent carbon layer, the photo-corrosion of CdS was prevented, so it had good cycle performance. Meanwhile, the appropriate mole of cadmium sulfur dosage was explored and found that 3 mmol was the most suitable. The CdS-3 sample performed the optimal hydrogen (H 2 ) evolution rate (312.6 μmol g −1 h −1 ) within 4 h. In addition, based on various characterization results of the photocatalyst, the novel structure and probable catalytic mechanism were further explored.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Shuo Zhao,Yuepeng Liu,Yanyun Wang,Jiasheng Fang,Yiqiang Qi,Yuming Zhou,Xiaohai Bu,Shuping Zhuo
Graphitic carbon nitride, regarded as a charming conjugated polymer, has been a visible light photocatalyst. Bulk carbon nitride endures the limited light absorption ability, few surface active sites and slow separation of photoinduced charge carriers, leading to the poor catalytic activity. Herein, a new carbon (C) and phosphorus (P) co-doped carbon nitride hollow tube with adjustable optical property (CPCN) was developed by applying melamine and polyacrylic amide as the precursors and phosphoric acid as the P source via a hydrothermal-thermal copolymerization way. The effects of polyacrylic amide content on the morphology and photocatalytic performance were intensively investigated. The special hollow tube favors the improvement of active sites and visible light harvesting ability. Meantime, C and P co-doping results in the narrow band gap and rapid charge transfer, thus enabling an enhanced catalytic activity under visible light irradiation. Particularly, CPCN-50 exhibits a remarkable H 2 generation rate of 4485.7 μmol h −1 g −1 under λ > 400 nm, which is higher than pure carbon nitride CN (902.3 μmol h −1 g −1 ), C doped sample CCN-50 (3741.1 μmol h −1 g −1 ) and P doped sample CNP (2280.0 μmol h −1 g −1 ). It implies that C, P co-doping exhibits a synergistic effect on boosting photoinduced charge transfer and hindering the recombination. Moreover, CPCN-50 illustrates a higher H 2 generation rate (3024.5 μmol h −1 g −1 ) than CN (400.8 μmol h −1 g −1 ) under λ > 420 nm irradiation. This way developed in this work might exhibit utility for synthesizing highly effective photocatalysts for the CO 2 reduction, H 2 evolution and so on.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Wen Jin,Xinhua Huang,Haiyan Cheng,Ting Xu,Feng Wang,Xiaoyu Guo,Yiping Wu,Ye Ying,Ying Wen,Haifeng Yang
We report a facile approach to prepare high density of tiny Pt nanoparticles less than 3 nm loaded on the polyaniline hollow tubes in uniform way. Polyaniline hollow tubes in diameter of micro size are synthesized via the polymerization of aniline onto the template of sulfonated electrospun polystyrene fibers, followed by the removal of core polystyrene fibers. The as-prepared highly crystalline Pt nanoparticles on the surface of polyaniline microtubes show the much higher electrochemical active surface area of 90.49 m 2 /g, high mass catalytic current density, good durability toward the methanol oxidation reaction as well as the excellent carbon monoxide tolerance. The hollow-structure-conductive-polymer- based synthesis strategy for high performance catalyst in this study could be applied to produce other catalysts with the enhanced activities.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shengyan Liu,Wensheng Lin,Ao Wang,Wei Chen,Liangying Yu,Chong Tian
The mass discharge of mercury from coal-fired power plant has caused great harm, abating mercury emissions is of preoccupation for protecting public environmental safety and human health. Metal oxides are often used for Hg 0 removal in the flue gas. In this paper, a hollow tubular MnO x (MnCot) was successfully prepared by rapid flame annealing using cotton fiber as a sacrificial template. The MnCot were then well characterized and tested for its capability for Hg 0 removal in flue gas. The results indicate that the flame assisted synthesis method for rapidly prototyping metal oxides with typical structures is achievable. The hollow tubular structure of the cotton fiber is well reprinted with good crystallization of Mn 3 O 4 . The inner diameter of the hollow tubular MnCot is about 10 μm, and the thickness of the tube is about 1 μm. The Hg 0 removal efficiency on MnCot can be maintained as high as 90 % under simulated flue gas atmosphere below 240°C. O 2 and NO have a positive effect on the Hg 0 removal, which can act as the fresh active sits thus enhancing its capability for Hg 0 removal. However, the presence of SO 2 will result in the surface sulfation on MnCot, thus deteriorating its capability for Hg 0 removal. Further, the competitive adsorption between SO 2 and Hg 0 on the material will also weaken its capability for Hg 0 removal. The hollow tubular MnO x rapidly prepared by one-step flame annealing has a good industrial application potential for Hg 0 removal in coal-fired flue gas.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Bingqian Wang,Junyi Ma,Shujun Xu,Wenping Fan,Bin Liu,Guangming Li,Guangda Li
In this paper, a hollow tubular Co 3 S 4 /NiS/FeS heterogeneous composite was prepared by an ordinary hydrothermal procedure. The inner Co 3 S 4 can act as the carrier of the outer NiS/FeS, and the outer NiS/FeS can effectively prevent the collapse of the inner Co 3 S 4 hollow structure, ensuring the durability of the structure and performance in the cyclic charge-discharge test. The strong electronic interaction between Co 3 S 4 and NiS/FeS significantly improves the catalytic activity. It shows a small 230 mV overpotential at 10 mA cm −2 , which is superior to commercial RuO 2 . The Zn-air battery assembled with Co 3 S 4 /NiS/FeS catalyst showed outstanding stability over 2700 cycles with a narrow voltage gap of 0.67 V at 3 mA cm −2 . Flexible battery also combined based on this catalyst can generally be discharged/charged at each bending angle and the gap remained almost continuous. Furthermore, Co 3 S 4 /NiS/FeS also displays hydrogen evolution reactions activity, displaying a lower overpotential of 233 mV at 10 mA cm −2 . In the overall water splitting, Co 3 S 4 /NiS/FeS is used as both anode and cathode electrocatalyst , which can reach 10 mA cm −2 at 1.52 V, and the performance remains steady for 50 h. In conclusion, Co 3 S 4 /NiS/FeS is a potential tri-functional catalyst for ZABs and overall water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2022
·Vol. 66
·期 3
·1042-1052
·
IF 8.64
Zhang Weijie,Zhao Shunshun,Qin Hongjie,Zheng Qiling,Zhang Penghui,Li Xiaojuan,Li ChuanLin,Wang TongKai,Li Na,Zhang Shouwei,Xu Xijin
Using photocatalytic hydrogen evolution (PHE) technology is a powerful way to solve the energy shortage. In this study, a hexagonal hollow tubular nitrogen-doped carbon (N−C)-coated In 2 O 3 /CdZnS heterojunction photocatalyst was in situ synthesized using a simple oil bath heating method. Results show that the PHE rate of N−C/In 2 O 3 /CdZnS (∼22.87 µmol h −1 ) is ∼2.4 times that of pristine CdZnS (∼9.49 µmol h −1 ) and ∼54.5 times that of pristine In 2 O 3 (∼0.42 µmol h −1 ). After four cycles, the PHE rate can still retain more than 90% of the original. Its excellent photocatalytic performance is mainly attributed to the following aspects: (1) the N−C layer acts as an electron transport bridge, which ensures the efficient electron transfer of the photocatalytic reaction; (2) the hollow tubular structure enhances the light reflection and absorption; (3) the N−C/In 2 O 3 /CdZnS heterostructure improves the carrier recombination and photocorrosion; (4) the large specific surface area and mesoporous structure provide a large number of reactive sites. This study provides a novel idea for designing visible-light-type heterojunction catalysts.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Zifan Li,Zhibin Zhang,Xiang Zhu,Cheng Meng,Zhimin Dong,Songtao Xiao,Yingcai Wang,Youqun Wang,Xiaohong Cao,Yunhai Liu
Photocatalytic uranium extraction from nuclear effluent is a promising approach for avoiding environmental damage and recovering uranium resources. Here, a hollow tube-like D-A organic semiconductor photocatalyst consisting of triazine (Acceptor) and carbon ring (Donnor) was synthesized via two cheap monomers , sodium alginate and melamine . The incorporation of carbon ring structure could endow g-C 3 N 4 with unique hollow hexagonal tube-like morphology, modulate the electronic excitation model, lower the energy for exciton dissociation, and promote the adsorption and activation of O 2 . Thus, the D-A photocatalyst established high efficiency of photocatalytic uranium separation under LED light and high concentration of anions and cations interference. More importantly, we propose a novel theory, that photocatalytic-induced-uranyl-coordination-reaction (PIUCR), and highlight that the formation rate and pathway of crystal nucleus is the most crucial step for the surface reaction of photocatalytic uranium separation. This study provides insights and guidelines for the in-depth understanding of the photocatalytic separation of uranium.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 18
·5709-5722
·
IF 6.177
Dongbo Wang,Xiyuan Dong,Ye Lei,Changqing Lin,Dan Huang,Xin Yu,Xuan Zhang
Photocatalytic degradation of pollutants is regarded as an economical and environmentally-friendly strategy. Herein, a hollow tubular carbon nitride photocatalyst co-doped with manganese and phosphorus (Mn–PCN) was synthesized by a one-step hydrothermal–calcination method and used for the photocatalytic degradation of organic pollutants. Introducing P shaped the tubular morphology, increased the specific surface area, and enhanced the light efficiency. Adding Mn narrowed the band gap, regulated the tubular morphology, and affected the electronic structure. Co-doping P and Mn enhanced the photocatalytic performance synergistically. Compared with pure carbon nitride (CN), the photocatalytic performance of Mn–PCN was greatly improved. Rhodamine B could be removed almost completely in 150 min with 3Mn–PCN, and the degradation rate constant k was 0.01924, which was 14 times that of CN. Meanwhile, 3Mn–PCN could remove 99% of tetracycline hydrochloride, 57% of bisphenol A, and 68% of sulfamethoxazole. The Mn–PCN structure was identified and the possible mechanism was proposed according to DFT calculation and experimental results. The results provide new insights into rational design of highly active catalysts with visible light sensitive activity.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Jiyan Li,Yanju Jing,Guoyu Xing,Gaoxiong Su,Meichen Liu,Hanxue Sun,Zhaoqi Zhu
Solar steam generation (SSG) is a sustainable water purification technology that has great application in addressing the problem of global water scarcity. Herein, a kind of magnetic photothermal materials (PMs) were prepared by Fe 3 O 4 co-precipitation with the hollow tubular fiber of Cirsium setosum as support (named CSFPT). The natural hollow tubular structure gives CSFPT excellent water-gas transmission capacity and salt resistance. Under 1 kW m −2 illumination, the evaporation rate is 1.47 kg m −2 h −1 . No crystallization was found on the surface of the CSFPT during 30 days of soaking in 20% NaCl. The magnetic ions in CSFPT make it easy to recycle and precise placement and increase the ability to purify heavy metal wastewater. The purification efficiency of heavy metal ions exceeds 99.5%. The CSFPT has the advantages of a simple preparation method, strong scalability, low cost, recyclability, precise placement, and so on. It is expected to become a potential candidate material for the practical application of SSG.
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 PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Xiangqian Guo,Chenhui Qiu,Lei Wang,Jing Ding,Jinfeng Zhang,Hui Wan,Guofeng Guan
Photocatalytic CO 2 reduction with perovskite can effectively address both energy and environmental issues. Nevertheless, it remains challenging to prepare photocatalysts with suitable hollow tubular structures in rational. Herein, the La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber with a hollow tubular structure was fabricated through an electrospinning method. The hollow nanofiber structure was constructed by doping Sr atoms in the A-site and Fe atoms in the B-site of LaCoO 3 perovskite. The characterization of TEM proved that the hollow tubular structural La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber exhibited an external diameter of about 95 nm and an internal diameter of about 50 nm. The hollow tubular structural La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber showed superior carrier separation ability which could exhibit significant advantages for photocatalytic CO 2 reduction. The CH 3 OH generation rate over the optimized La 0.8 Sr 0.2 Co 0.7 Fe 0.3 O 3 nanofiber could reach 5.25 µmol⋅g −1 ⋅h −1 . This work highlighted an electrospinning strategy to build a hollow tubular structural La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber for enhancing photoreduction CO 2 .
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
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yafei Xue,Ge Ma,Xin Wang,Mingliang Jin,Eser Metin Akinoglu,Dan Luo,Lingling Shui
The development of high-efficiency oxygen electrocatalysts with earth-abundant transition metals rather than scarce noble metals has aroused growing interests due to their potential for energy storage and conversion applications. Herein, we developed a facile strategy to synthesize hollow tubular bimetallic Ni–Co oxide rooted with dense nanosheets for enhanced bifunctionality and facilitated redox reaction kinetics. Owing to the rational design of morphology and well-dispersed Ni and Co ions, the bimetallic samples exhibit admirable bifunctional electrocatalytic activities. This bimetallic Ni–Co oxide shows superior oxygen electrocatalytic performance in comparison with the monometallic Ni and Co oxides, according to the electrocatalytic synergistic effect from the bimetallic system. The optimized sample with the specific mass ratio of Ni and Co displays the oxygen reduction reaction (ORR) property comparable to commercial Pt/C and oxygen evolution reaction (OER) performance superior to commercial RuO2. The electrochemical tests and structural characterizations offer in-depth dissection on the electrocatalytic behaviors, especially the superb stability in both ORR and OER tests, as well as the outstanding resistance to methanol poisoning, representing a promising candidate in the renewable energy field.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Ming Yin,Li Zhang,Yan Chen,Shuyan Qi,Xiuxia Wei,Xinxin Tian,Jingxuan Qiu,Dongpo Xu
A mesoporous In 2 O 3 @Au nanofiber was proposed for the electrochemical aptasensor for the detection of ampicillin (AMP). In this sensor, Au-modified In 2 O 3 (In 2 O 3 @Au) was incubated with an aptamer (Apta), and the resulting electrode modification was integrated on the surface of the working electrode. Cyclic Voltammetry (CV), Differential Pulse Voltammetry (DPV) and Electrochemical Impedance Spectroscopy (EIS) were used to realize the research of electrode modification and the detection of AMP. According to the detection results of DPV, the current value and the logarithm of the concentration showed an ideal linear relationship. R 2 reached as high as 0.9871, and the detection limit was 1 pg/mL. It has good selectivity and cycle stability. Compared with other antibiotics or amino acids, it has higher selectivity for AMP. The proposed In 2 O 3 @ [email protected] can effectively and sensitively detect AMP in milk and has broad application prospects.
研究领域:
生物传感
·
材料科学
·
分析化学
✓ 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）