COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Yingying Qian,Jianhai Wang,Yuesong Shen
Heterojunction engineering has garnered significant attention in photocatalysis as an effective strategy to address the rapid carrier recombination dynamics in semiconductor photocatalysts. The core challenge in constructing high-performance heterojunction systems lies in establishing optimized interfacial connections to achieve directional charge carrier migration. This study proposed a temperature-regulated band engineering strategy, through precise control of Ni-MOFs growth temperature and integration with WO 3-x possessing exceptional photothermal conversion capacity, to successfully construct an efficient Z-scheme heterojunction system. When the synthesis temperature of the Ni-MOF reached 140 °C, its conduction band negatively shifted to −1.2 eV (vs. NHE), resulting in a well-matched Z-scheme heterojunction with WO 3-x . The optimized 140-Ni-MOF/WO 3-x heterojunction demonstrated remarkable enhancement in charge separation efficiency while preserving strong redox capabilities through the Z-scheme charge transfer pathway. Under mild gas-solid reaction conditions (H 2 O as electron donor), the optimized catalyst exhibited excellent CO 2 reduction performance, achieving a CO production rate of 111.17 μmol·g −1 with 96.92 % selectivity. The temperature-depended modulation strategy for MOF electronic band structure proposed in this study paved the way for constructing efficient MOF-based photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 26
·2001024
·
IF 11.459
Xianglin Xiang,Bicheng Zhu,Bei Cheng,Jiaguo Yu,Hongjin Lv
Herein, oil-soluble CdS quantum dots (QDs) are first prepared through a solvent-thermal process. Then, oil-soluble CdS QDs are changed into water-soluble QDs via ligand exchange using mercaptopropionic acid as capping agent at pH 13. The photocatalytic performance is investigated under the visible light irradiation using glycerol as sacrificial agent and Sn 2+ as cocatalyst. No H 2 -production activity is observed for oil-soluble CdS QDs. Water-soluble CdS QDs exhibit significantly enhanced hydrogen evolution rate. When the concentration of cocatalyst Sn 2+ increases to 0.2 × 10 −3 m , the rate of hydrogen evolution reaches 1.61 mmol g −1 h −1 , which is 24 times higher than that of the pristine water-soluble CdS QDs. The enhanced H 2 -production efficiency is attributed to the adsorption of Sn 2+ ions on the surface of CdS QDs that are further reduced to Sn atoms by photogenerated electrons. The in situ generated Sn atoms serve as photocatalytic cocatalyst for efficient hydrogen generation.
研究领域:
材料科学
·
光催化
·
纳米技术
·
氢能
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ruiqi Zhang,Xintong Yao,Xinru Meng,Xinyu Li,Dafeng Zhang,Junchang Liu,Peiqing Cai,Xipeng Pu
To effectively harness solar energy, the rational construction and development of full-spectrum photocatalysts has become an appealing challenge. In this study, a novel full-spectrum responsive FeS 2 /Mn 0.3 Cd 0.7 S (FS/MCS) S-scheme photocatalyst was obtained by attaching FeS 2 nanoparticles with excellent photothermal properties on Mn 0.3 Cd 0.7 S nanorods. The photocatalytic hydrogen production rate of the optimal FS/MCS composite was 52.017 mmol·g −1 ·h −1 under full-spectrum irradiation, which was 3.88 times that of pure MCS. Based on the experimental results and density functional theory (DFT) calculations, the enhanced photoactivity of FS/MCS was attributed to the synergetic effects of photothermal and S-scheme heterojunction. The photothermal effect of FeS 2 could convert the near infrared light to heat, which elevated the local temperature of photocatalyst particles, thereby promoting the photocatalytic reaction. Meanwhile, the S-scheme heterojunction between FeS 2 and Mn 0.3 Cd 0.7 S accelerated the charge transfer and suppressed the recombination of electron-hole pairs, thereby enabling efficient charge separation while maintaining high redox potentials. This work offers a novel perspective on constructing a full-spectrum-driven photothermal-assisted photocatalytic H 2 evolution system though the dual effects of photothermal and heterojunction.
研究领域:
材料科学
·
光催化
·
可再生能源
·
纳米材料
·
太阳能转换
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yifan Zhang,Jie Shi,Xiaoqing Ding,Jiaojiao Wu,Yan-Zhen Zheng,Xia Tao
Unary-organic-cation lead halide perovskites like MAPbI3 have been emerging as tremendous photocatalysts for H2 evolution recently. However, their photocatalytic performances are inferior without modification. Here, a series of mixed-organic -cation perovskites MA1–xFAxPbI3 (M1–xFxPI, x = 0, 0.2, 0.3, 0.4, 0.5) were synthesized by introducing FA+ into MAPbI3 precursor and then composited with MoS2 as photocatalysts for H2 evolution reaction (HER). We demonstrate that the fabricated MoS2/M0.6F0.4PI is highly efficient and ultrastable during the photocatalytic HER process. The optimal MoS2/M0.6F0.4PI composite, i.e., 20 wt % MoS2/M0.6F0.4PI exhibits a visible HER rate of 2131 μmol h–1 g–1, increasing by 88-fold in comparison with pure MAPbI3 (24 μmol h–1 g–1) and better than the optimized Pt/M0.6F0.4PI (1328 μmol h–1 g–1). No activity degradation of 20 wt % MoS2/M0.6F0.4PI occurs in repeated HER experiments. The (photo)electrochemical performances of the composite are studied to reveal the photoinduced charge transfer and consequent HER process.
研究领域:
材料科学
·
光催化
·
能源化学
·
纳米材料
·
半导体物理
·
太阳能转化
✓ 已验证
DOI
高影响因子
ACS Sensors
·
2026
·
IF 10.9
Rongping Xu,Baihe Sun,Jianhui Sun,Zhuo Li,Peng Li,Zhiyu Ren,Liqiang Jing
The highly sensitive photoelectric detection of hydrogen (H2) at room temperature (RT) is highly desired, but it is crucial to boost •O2− generation by improving charge transfer and favorable O2 adsorption. Herein, we construct a novel all-organic polydopamine/poly(heptazine imide) (PDA/PHI) nanosheet heterojunction through in situ polymerization for photoelectric H2 detection. The optimized one exhibits high sensitivity (an ultralow detection limit of 500 ppm and a high gas response of 42.8% for 5000 ppm H2), along with good linearity from 500 to 5000 ppm, under 405 nm irradiation at RT based on the dynamic detection process. Moreover, good repeatability in 40 cycles, long-term stability (over 210 days), and high selectivity are confirmed. The outstanding performance is attributed to the efficient Z-scheme charge transfer and the promoted O2 adsorption for facilitating the •O2− species generation. Interestingly, the in situ μs-transient absorption spectra quantitatively reveal that the electron transfer efficiency (ETE) to the adsorbed O2 of the PDA/PHI heterojunction is changed from 68.0% to 31.1% after introducing H2, while the change rate of ETE is more pronounced than that of PHI. This study demonstrates great potential of all-organic heterojunctions for RT photoelectric detection and provides deep insight into the •O2− species and gas sensing property.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Jian-Hui Zheng,Ming-Yu Qi,Zi-Rong Tang
Ni-modified ZnIn 2 S 4 for acid-free photocatalytic ethanol acetalization to 1,1-diethoxyethane and H 2 . • Loading the Ni cocatalyst accelerates charge separation, rendering the 1,1-diethoxyethane production rate 14.52 times higher than that of the blank ZIS, while maintaining nearly 100% selectivity. • The acetalization proceeds through the synergistic cooperation of in-situ generated protons and surface Lewis acid sites. Semiconductor-catalyzed acceptor-free dehydrogenative coupling of alcohols has emerged as a promising route for the artificial photosynthesis of high-value acetals. However, competitive activation of O–H and C–H bonds in alcohols causes uncontrolled generation of highly reactive radicals, making it challenging to achieve highly selective acetals production. Herein, we fabricate an efficient photoredox system based on Ni-modified ZnIn 2 S 4 (ZIS), which enables highly selective, acid-free C–O coupling of ethanol to 1,1-diethoxyethane (DEE) with concurrent H 2 evolution. Experimental results demonstrate that Ni modification optimizes the surface electron transport kinetics of ZIS while maintaining excellent DEE selectivity. The in situ-generated protons derived from ethanol dehydrogenation serve as a self-supplied proton source, driving the acetalization between the acetaldehyde intermediate and ethanol, facilitated by Lewis acid sites on the ZIS surface. This work offers some mechanistic insights and rational catalyst design guidelines for acid-free photocatalytic acetal synthesis, thereby enabling the coproduction of value-added chemicals and solar H 2 fuel. Download: Download high-res image (157KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Wenxuan Lu,Simin Wang,Yuxuan Xu,Jiayi Zhong,Xiao Xia Wang,Kun Zhao,Yunfei Gao,Fuchen Wang
Intermetallic Pt with an L10-PtM structure has been considered a promising oxygen reduction reaction (ORR) catalyst for proton exchange membrane fuel cells (PEMFC) due to its reduced Pt usage and high activity. However, it suffers from issues of agglomeration during high-temperature annealing compared with its L12-Pt3M counterparts. Meanwhile, attempts to utilize the advantages of both L10-PtM and L12-Pt3M are often limited by their difficulties in material synthesis. Herein, we support intermetallic Pt particles on single-atom metal–nitrogen–carbon (M–N–C) and destabilized Fe–N sites via H2 pretreatment during the carbonization. As a result, the synthesized O-PtCo@FeNC(5H) sample displays co-presence of both L10-PtM and L12-Pt3M phases with a size distribution of 3.20 ± 0.52 nm, achieving enhanced catalytic activity and stability (mass activity (MA) = 1.23 A mgPt–1, 89.1% MA retention after 30,000 cycles). Furthermore, the membrane electrode assembly (MEA) test shows an enhanced MA of 0.471 A mgPt–1 and a peak power density of 1.288 W cm–2 in H2–air conditions. Additionally, the synthetic strategy can be extended to other M–N–C supports, including CoNC and NiNC. Overall, this work demonstrates a strategy for integrating the advantages of L10-PtM and L12-Pt3M by the use of a modified M–N–C single-atom support.
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Zeyuan Gao,Yongchao Sun,Lu Bai,Tianyou Li,Jianyu Guan,Fake Sun,Fangxu Fan,Gaohong He,Canghai Ma
Ring-opened TB-OR is blended with PIM-1 to form a hydrogen-bonded membrane. • The TB-OR-PIM treated at 350 °C for 10 h achieve CO 2 /CH 4 selectivity of 330.0. • The optimized membranes exhibit 17.4- and 34.4-fold selectivity improvements. • The membranes show excellent resistance to CO 2 plasticization at 600 psi. Polymers of intrinsic microporosity (PIM) membranes have shown great potential for hydrogen purification and carbon dioxide separation, but often suffer from low gas selectivity. Here, a hydrogen-bonded-assisted, thermally crosslinked membrane is prepared by incorporating ring-opened TB-OR with PIM-1. Hydrogen-bonding interactions between the amine groups of TB-OR and the nitrile groups of PIM-1 promote interchain association and preorganization before thermal treatment. Subsequent thermal treatment induces chain rearrangement, structural densification, and partial covalent crosslinking, while hydrogen-bonding interactions are re-established upon cooling, leading to a more size-selective microporous structure. The membrane treated at 350 °C for 10 h exhibits CO 2 /CH 4 and H 2 /CH 4 selectivities of 330.0 and 708.3, representing 17.4- and 34.4-fold improvements over the uncrosslinked membrane, surpassing the 2019 upper bound for CO 2 /CH 4 and approaching the 2015 upper bound for H 2 /CH 4 separation. Both pure- and mixed-gas tests at 600 psi confirm excellent resistance to CO 2 plasticization, while aging measurements further demonstrate improved performance stability. These results highlight the effectiveness of hydrogen-bond-assisted thermal crosslinking in regulating chain packing and microporous structure in PIM-based membranes for hydrogen purification and high-pressure CO 2 separation. A thermally crosslinked membrane platform was developed by integrating ring-opened TB-OR with PIM-1 to simultaneously enhance gas separation selectivity and operational stability. Download: Download high-res image (388KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Xiaoting Mo,Yue Tian,Heming Wang,Jiahao Dai,Fuzhen Cao,Rongyi Huang,Lizhen Long,Jun Liu
The controllable synthesis TiO 2 with desired morphology and phase composition is essential for achieving the properties required in various applications. Herein, TiO 2 nanotube arrays were synthesized through anodic oxidation followed by calcination in an argon atmosphere. The effects of fluoride ion (F - ) concentration in the electrolyte, oxidation time, and calcination temperature on morphology and phase composition were systematically investigated. The optimal conditions for producing well-defined mixed-phase TiO 2 nanotubes were determined to be anodizing at 60 V for 2 h in an electrolyte consisting 0.4 wt% F - . The mixed-phase TiO 2 obtained at 600 °C exhibited the highest photocurrent, which is 2.7 and 3.4 times that of single anatase phase and rutile phase, respectively. The total amount of hydrogen evolution over the optimized mixed-phase TiO 2 photoelectrode reached 387.1 μmol/cm 2 within 160 min under UV–vis illumination at an applied bias of −1.5 V. The corresponding degradation efficiency for RhB (Rhodamine B) at the platinum electrode was approximately 13 %. The enhanced PEC (photoelectrocatalytic) performance of mixed-phase TiO 2 can be attributed to the synergistic effects arising from extended visible-light absorption, a well-defined one-dimensional nanotube structure, and efficient separation of photogenerated carriers at hetero-phase junction. This work provides valuable guidance for synthesizing mixed-phase TiO 2 electrode using controllable methods.
研究领域:
材料科学
·
光电化学
·
环境催化
·
纳米材料
·
能量转换
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yongxia Zhang,Yunfeng Qiu,Yanping Wang,Bing Li,Yuanyuan Zhang,Zhuo Ma,Shaoqin Liu
Electrochemical water splitting into hydrogen is a promising strategy for hydrogen production powered by solar energy. However, the cell voltage of an electrolyzer is still too high for practical application, which is mainly limited by the sluggish oxygen evolution reaction process. To this end, hybrid water electrolyzers have drawn tremendous attention. Herein, coaxial Ni/Ni3S2@N-doped nanofibers are directly grown on nickel foam (NF), which is highly active for hydrogen evolution reaction. Meanwhile, the Ni3S2@N-doped nanofibers on NF prepared in an Ar atmosphere display superior urea oxidation reaction performance to previously reported catalysts. The cell voltage is about 1.50 V in urea electrolysis to deliver a current density of 20 mA cm–2, lower than that of a traditional water electrolyzer (1.82 V). The current density is around 77% relative to its initial value of 20 mA cm–2 after 20 h, superior to Pt/C|Ir/C-based urea electrolysis (14%). It is found that the synergistic effect between metallic Ni and Ni3S2, as well as the interfacial effect between metal centers and N-doped carbon, favors the initial dissociation of H2O and the adsorption/desorption of H* with thermal neutral Gibbs free energy. Meanwhile, the in-situ generated NiOOH on the outer surface of Ni3S2 possessed lower electrochemical activation energy for urea decomposition. Meanwhile, the abundant oxygen vacancies in electrodes could expose more active sites for the adsorption of intermediates, including H* and OOH*. It is also found that the hierarchical nanostructure of densely packed nanowires provides ideal electronic and ionic transport paths for fast electrocatalytic kinetics. The present work indicated that the modulation of compositions and hierarchical nanostructure is effective to prepare efficient catalysts for H2 production via urea electrolysis.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Jiajia Wang,Yuanyuan Liu,Zeyan Wang,Peng Wang,Zhaoke Zheng,Xiaoyan Qin,Xiaoyang Zhang,Ying Dai,Baibiao Huang
Enhancing the photocatalytic activity of NiO towards hydrogen generation (6 times) is achieved by phenyl phosphoric acid (PPA) surface modification. The photocatalytic activity can be further improved by changing PPA to 4-aminophenyl phosphonic acid (PPA-NH 2 ), about 10 times, suggesting the functional group plays an important role in improving the activity. A chemical bond (Ni O P) between NiO and organic phosphoric acid was proved by FT-IR spectra. XPS and LSV analysis suggested organic phosphonic acid modification increased the electron density of Ni, which promoted the transformation from Ni 2+ to Ni 0 . Mott-Schottky (M − S) measurement revealed that PPA-NH 2 modified NiO processed a larger the space charge layer thickness (d sc ), which enhanced ability towards H 2 evolution from dynamical aspect.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Fanpeng Meng,Wenjie Tian,Zhihao Tian,Xiaoyao Tan,Huayang Zhang,Shaobin Wang
Post thermal treatment of bulk graphitic carbon nitride (g-C 3 N 4 ) by ammonia gas acts as a significant structure regulation approach, while pure ammonia-assisted g-C 3 N 4 synthesis from precursors like melamine is rarely investigated. Here we prove the synthesis of N-defects abundant carbon nitride nanosheets (ACN) through a one-pot thermal polymerization of melamine in pure ammonia gas, for photocatalytic organic pollutant removal in water and H 2 evolution applications. Compared to bulk g-C 3 N 4 (BCN), ACN-550 (ACN prepared at 550 °C) exhibited thin-layered porous morphology with higher surface area and abundant N defects, resulting in wider distribution of active sites. Moreover, the abundant N defects in the heptazine heterocycle structure could change the electronic structure of g-C 3 N 4 , leading to more efficient transport of photogenerated charge carriers and enhanced photoreduction potential, which gives rise to notable improvement activities in photocatalytic reaction. With superoxide ion radical and photoinduced holes as the predominant reactive species, ACN-550 realized efficient photocatalytic bisphenol A (BPA) degradation, which is 1.6- and 4.7-fold high over commercial TiO 2 (P25) and BCN, respectively. ACN-550 exhibited excellent reusability and stability in five consecutive photocatalytic BPA degradation tests. In photo-reductive H 2 production system by ACN-550, 761.8 ± 4.3 μmol/h/g H 2 was produced, which was 11.6-fold as high as that by BCN.
研究领域:
材料科学
·
环境科学
·
化学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）