FUEL
·
2022
·
IF 8.035
Jiaru Peng,Ying Wang,Jiayu Bai,Dingxuan Ma,Ruiyang Zhao,Jishu Han,Lei Wang
Photocatalytic water splitting utilizes solar energy to produce hydrogen, which is considered as one of the most efficient approaches for solving the current global energy and environmental crises. In this work, hollow ZnTiO 3 nanospheres were prepared by calcination method, then ZnS was loaded onto the surface of ZnTiO 3 . At last, Zn 0.98 Cu 0.02 Se nanocrystals with different concentrations were modified at the outermost layer. The optimal photocatalytic hydrogen evolution amount of Zn 0.98 Cu 0.02 Se/ZnS/ZnTiO 3 reached to 36662.23 μmol·g −1 in 6 h. The construction of ternary photocatalyst effectively improved the utilization rate of light absorption, realized the rapid separation and transfer of electrons, significantly suppressed the recombination of charge carriers and was benificial for the enhancement of photocatalytic hydrogen evolution performance.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Bin Zhu,Chunlin Chen,Liyuan Huai,Zhenqiang Zhou,Lei Wang,Jian Zhang
Simultaneous production of value-added 2,5-furandicarboxylic acid (FDCA) and H 2 from the integrated 5-hydroxymethylfurfural (HMF) oxidation and hydrogen evolution reaction by electrocatalysis has drawn tremendous attention due to the significantly improved energy efficiency. However, HMF is not thermally and chemically stable enough to often cause heavy degradation, impeding its storage and industrialization. In this work, a more stable furan molecule, 2,5-bis(hydroxymethyl)furan (BHMF), was employed as the reaction substrate into the coupling system for the first time. By means of facile electrodeposition and subsequent oxidative activation, the standing CoOOH nanosheet electrocatalyst was fabricated to realize a complete BHMF conversion with 90.2 % FDCA yield and 100 % current efficiency for H 2 evolution. The reaction path and apparent activation energies were therefore discussed. Scalable properties and electrochemical durability of CoOOH were evaluated in a continuous flow reactor to harvest gram-level solid FDCA, highlighting the prospect of green coupling electrolysis for industrial application.
研究领域:
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Chao Peng,Ping Wei,Xiaoyao Li,Yunpeng Liu,Yonghai Cao,Hongjuan Wang,Hao Yu,Feng Peng,Liyun Zhang,Bingsen Zhang,Kangle Lv
It is of prime importance to harness the transfer and flow of photogenerated electrons and holes to elongate the lifetimes of charge carriers and enhance the activity of semiconductor photocatalyst , which can be achieved by hybridizing the photocatalyst with appropriate cocatalysts with right electronic properties and placement. Herein, MXenes, a young family of two-dimensional transition metal carbides , are exploited as a hole mediator to enhance the photocatalytic activity of TiO 2 . We grow TiO 2 sheets exposing (001) surfaces on layered Ti 3 C 2 T x , and then photodeposited Cu 2 O nanodots on TiO 2 . We experimentally prove that the Ti 3 C 2 T x MXene from the wet HF etching method behaves as a low work function material ( ϕ = 3.4 eV). Thanks to this unique electronic property, the photogenerated electrons on TiO 2 hybridized with Ti 3 C 2 T x accumulate and tunnel to Cu 2 O to reduce it to elemental Cu as a reduction cocatalyst. The resulting Cu/TiO 2 @Ti 3 C 2 T x photocatalyst efficiently split water to produce hydrogen at 860 μmol g −1 h −1 . The results presented here demonstrate the promise of MXene materials in photocatalytic solar energy utilization. The insight into the electronic property of MXene sheds light on the new approach to the rational design of high-efficiency photocatalysts composed of MXenes.
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
Nanomaterials
·
2022
·Vol. 12
·期 11
·1890
·
IF 5.719
Xiaogang Liu,Wenjie Chen,Xin Zhang
The exploitation of highly efficient and stable hydrogen generation from chemical storage of formaldehyde (FA) is of great significance to the sustainable development of the future. Moreover, developing an accurate, rapid, reliable, and cost-effective catalyst for electrochemical detection of FA in solution is appealing. Herein, we report rational construction of Pd nanoparticles decorated reduced graphene oxides (Pd/rGO) nanohybrids not only as robust catalysts to produce hydrogen from alkaline FA solution and but also electrocatalysts for electrochemical detection of FA. By optimizing the reaction parameters including FA concentration, NaOH concentration and reaction temperature, Pd/rGO with Pd loading of 0.5 wt% could exhibit a high hydrogen production rate of 272 mL g−1min−1at room temperature of 25 °C, which is 3.2 times that of conventional Pd NPs. In addition, as-prepared Pd/rGO nanohybrids modified glassy carbon (GC) electrodes are used as FA-detected electrochemical sensors. A sensitive oxidation peak with a current density of 8.38 mA/cm2was observed at 0.12 V (vs. Ag/AgCl) in 0.5 M NaOH containing 10 mM FA over Pd/rGO catalysts with Pd loading of 0.5 wt%. The results showed the prepared Pd/rGO nanocatalyst not only exhibited efficient and stable hydrogen production from alkaline FA solution but also had good electrocatalytic properties with respect to formaldehyde electrooxidation as a result of the synergistic effect of Pd NPs and rGO nanosheets.Keywords:palladium;graphene;hydrogen production;formaldehyde detection
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Weizhao Hong,Yansong Zhou,Chade Lv,Zhonghui Han,Gang Chen
Quantum dots (QDs) have great potential to build heterojunctions for efficient photocatalytic hydrogen production because of the quantum size effects, whereas they are limited by the rigorous preparation. Herein, we report a facile sacrificial coating strategy toward the construction of the NiO QDs/TiO2 heterojunction. Shorter transmission distance of carriers and higher crystallinity between NiO QDs and TiO2 substrate are achieved to minimize the recombination of photoinduced electrons and holes. As a result, excellent performance of 1.35 mmol h–1 g–1 over the NiO QDs/TiO2 sample is achieved, which is 37 times higher than that of NiO/TiO2 and 56 times higher than that of pure TiO2. Furthermore, this is one of the best performances reported in heterojunctions made of NiO and TiO2.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Juan Jia,Xiaomin Guo,Ying Tang,Wenjing Zeng,Hui Zeng,Zebao Rui
Construction of efficient and economically controllable catalysts for photocatalytic hydrogen production to relieve environmental and energy pressures remains an ongoing challenge. Herein, indium zinc sulfide supported carbon dots (CDs) and Ni 3 P hybrid (CDs/Ni 3 P/ZnIn 2 S 4 ) is designed as a robust catalyst for photothermal catalytic hydrogen production by water splitting. The co-introduction of CDs/Ni 3 P on ZnIn 2 S 4 as electron acceptors effectively enhances the photon harvest capacity and separation efficiency of photogenerated charges, and ultimately leads to excellent photothermal catalytic hydrogen production performance. The average hydrogen production rate of CDs/Ni 3 P/ZnIn 2 S 4 reaches 1880.78 μmol g −1 h −1 under 50 °C and full spectrum irradiation of 200 mW cm −2 , which is ∼8.8 times higher than the pristine ZnIn 2 S 4 and ranges among those over noble metal catalysts. Such a work provides a reliable route for the design of non-precious photothermal catalysts for photocatalytic hydrogen production.
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
Frontiers of Chemical Science and Engineering
·
2021
·Vol. 15
·期 6
·1561-1571
·
IF 4.204
Quan Huiying,Qian Kejiang,Xuan Ying,Lou Lan-Lan,Yu Kai,Liu Shuangxi
It is of broad interest to develop emerging photocatalysts with excellent light-harvesting capacity and high charge carrier separation efficiency for visible light photocatalytic hydrogen evolution reaction. However, achieving satisfying hydrogen evolution efficiency under noble metal-free conditions remains challenging. In this study, we demonstrate the fabrication of three-dimensionally ordered macroporous SrTiO3 decorated with Zn x Cd 1 − x S nanoparticles for hydrogen production under visible light irradiation (λ > 420 nm). Synergetic enhancement of photocatalytic activity is achieved by the slow photon effect and improved separation efficiency of photogenerated charge carriers. The obtained composites could afford very high hydrogen production efficiencies up to 19.67 mmol·g −1 ·h −1 , with an apparent quantum efficiency of 35.9% at 420 nm, which is 4.2 and 23.9 times higher than those of pure Zn0.5Cd0.5S (4.67 mmol·g −1 ·h −1 ) and CdS (0.82 mmol·g −1 ·h −1 ), respectively. In particular, under Pt-free conditions, an attractive hydrogen production rate (3.23 mmol·g −1 ·h −1 ) was achieved, providing a low-cost and high-efficiency strategy to produce hydrogen from water splitting. Moreover, the composites showed excellent stability, and no obvious loss in activity was observed after five cycling tests.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Huiqin Ma,Zhuxiang Mao,Wen Liu,Yahao Zhao,Peng Liu,Difu Zhan,Qian Fu,Yizhong Huang,Changcun Han
ZnIn2S4 (ZIS) is an N-type direct bandgap semiconductor material with a visible light response, which exhibits excellent photocatalytic water-splitting performance. To enhance ZIS-based photocatalysts, heterojunction construction and cocatalyst loading methods have been explored extensively. In this research, a Co9S8/ZnIn2S4 (CS/ZIS) heterojunction was successfully synthesized via a solvothermal method, and then Ni(OH)2 nanoparticles were successfully loaded on CS/ZIS by photodeposition, yielding the Ni(OH)2/CS/ZIS photocatalyst. Our findings reveal tight coupling of ZIS nanosheets with the CS surface, establishing an effectively constructed heterojunction structure that enhances interface charge transfer and light absorption. The synergistic effect of CS and Ni(OH)2 significantly boosts the photocatalytic hydrogen production of ZIS composites. The optimum hydrogen production rate of CS/ZIS is 10.06 mmol·h–1·g–1 and that of Ni(OH)2/CS/ZIS reaches 12.92 mmol·h–1·g–1, a 11.9-fold increase over pure ZIS, with exceptional light stability. Furthermore, we discuss the photocatalytic reaction mechanism based on the experimental and characterization results. This work presents a novel approach to designing highly efficient photocatalysts using ZnIn2S4, aimed at enhancing the conversion of solar energy into chemical energy.
研究领域:
材料科学
·
能源化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 36
·2102307
·
IF 13.281
Hongli Yang,Jiaqi Tang,Yong Luo,Xiaoqiang Zhan,Zhao Liang,Lan Jiang,Huilin Hou,Weiyou Yang
The development of efficient visible-light-driven photocatalysts is one of the critically important issues for solar hydrogen production. Herein, high-efficiency visible-light-driven In 2 O 3 /CdZnS hybrid photocatalysts are explored by a facile oil-bath method, in which ultrafine CdZnS nanoparticles are anchored on NH 2 -MIL-68-derived fusiform In 2 O 3 mesoporous nanorods. It is disclosed that the as-prepared In 2 O 3 /CdZnS hybrid photocatalysts exhibit enhanced visible-light harvesting, improves charges transfer and separation as well as abundant active sites. Correspondingly, their visible-light-driven H 2 production rate is significantly enhanced for more than 185 times to that of pristine In 2 O 3 nanorods, and superior to most of In 2 O 3 -based photocatalysts ever reported, representing their promising applications in advanced photocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Hao Yu,Minghao Dou,Shuang Wang,Yuye Cheng,Zhiqiang Li,Hongyu Shao,Mengjie Yao,Xinrui Wang,Yanyan Chen,Shenjie Li
Although quantum dots (QDs) have unique properties that are different from conventional semiconductors, their photocatalytic activity and stability are far from expectations, and the preparation of semiconductor composites has become an important means to improve their photocatalytic hydrogen production performance. A convenient and safe coordination-assisted self-assembly method was used to encapsulate QDs into metal–organic frameworks and further formed AgInS2@ZIF-8/ZnS nanostructures by converting part of ZIF-8 into ZnS composite materials, which enhanced their photocatalytic hydrogen production performance and cycling stability. The results show that AgInS2@ZIF-8/ZnS nanocomposites have the highest photocatalytic activity (the average hydrogen production reaches 9.79 mmol·g–1·h–1; λ > 420 nm) after 6 h of sulfurization, which is far greater than that of AgInS2 QDs. Compared with the AgInS2@ZIF-8 composite, their performance is improved by nearly 10 times. In conclusion, a simple, safe, and easily-controllable method is used to prepare a novel and efficient photocatalytic material, which provides a new idea about the rational design of novel QD photocatalytic composites.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Lian Yi,François Nkinahamira,Hongyi Jiang,Jingyuan Huang,Yueyong Ma,Rongshu Zhu
The development of photocatalyst is essential for achieving efficient photocatalytic water splitting for hydrogen production . Therefore, a novel Mo 2 N (MN) decorated ZnIn 2 S 4 (ZIS) with sulfur-rich vacancy (Sv-ZIS) photocatalyst was rationally constructed via a facile calcining-hydrothermal method for efficient photocatalytic H 2 production. The optimized photocatalyst exhibits an outstanding photocatalytic H 2 production rate of 10.28 mmol·g −1 ·h −1 , 7.52 and 3.11 times higher than that of bare ZIS and S V -ZnIn 2 S 4 (S V -ZIS), respectively. The characterizations reveal that the presence of MN and S-vacancies improves the light absorption capacity, and facilitates the separation and migration of photogenerated carriers. Density functional theory calculations (DFT) have confirmed that MN can optimize ΔG H* to approach 0, which is favorable for photocatalytic hydrogen production . Therefore, the combined effect of MN and S-vacancies facilitates efficient photocatalytic H 2 production of S V -ZIS/MN.
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
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
·
2019
·Vol. 92
·期 6
·1047-1052
·
IF 4.431
Jiang Jifei,Zhu Qiong,Guo Yu,Cheng Lin,Lou Yongbing,Chen Jinxi
Photocatalytic hydrogen production is an effective strategy for meeting energy challenges. Here, a composite for photocatalytic hydrogen production via introduction of UiO-66 nanospheres into flower-shaped ZnIn2S4 microspheres (ZIS/U6) is described. The optimum composite with 20 mg UiO-66 loading displayed the high photocatalytic rate of 1860.9 µmol g−1 h−1 with an apparent quantum efficiency of 1.4% at 420 nm under visible-light irradiation, which is nearly 3 times higher than that of ZnIn2S4. The improved photocatalytic H2 rate mainly benefited from effective electron transfer between ZnIn2S4 and UiO-66. Additionally, we tried to introduce UiO-66-NH2 and UiO-66-(SH)2 with excellent visible light absorption into ZnIn2S4 to obtain composites. Surprisingly, they did not exhibit better photocatalytic hydrogen production rates. Combined with the electrochemical test results, it was found that they had completely different electron transfer paths from ZIS/U6. Therefore, a different photocatalytic mechanism was proposed and further verified by transient photocurrent.
研究领域:
材料科学
·
化学
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）