Dimensional TiO2 Research Articles

Electrospun three dimensional TiO2@N/P co-doped carbon nanofibers framework as high-performance anode materials for lithium-ion batteries

Electrospinning combined with heating treatment is employed to fabricate N/P co-doped carbon nanofibers encapsulating homogenous ultrafine TiO2 nanoparticles (TiO2@N/P-CNFs). Characterization results reveal that one-dimensional electrospun composite nanofibers with high electronic conductivity and structural integrity are interconnected with each other to construct a three-dimensional conductive nanofiber network as efficient ion/electron transport channels. Specifically, the Li//TiO2@N/P-CNFs coin cell delivers an initial discharge specific capacity of 754.9 mAh/g at 100 mA/g and maintains the reversible specific capacity of 486.1 mAh/g after 100 cycles. Moreover, the cell expresses the exceptional rate capability with discharge specific capacity of 272.2 mAh/g at 2000 mA/g, whose capacity can be restored to 474.3 mAh/g as soon as the current density is returned to 100 mAh/g. Furthermore, Li//TiO2@N/P-CNFs cell demonstrates a significant pseudocapacitive contribution of 78% at 1.0 mV/s. The excellent electrochemical performance can be explained by the fact that the N/P co-doping strategy is promising strategy for facilitating Li+ ions storage and transfer by broadening interlayer distance and increasing the distribution of defects and active sites. Besides, ultrafine TiO2 nanoparticles with diameter of about 7 nm harness excellent mechanical strength to maintain structural stability upon cycling. Therefore, easily fabricated TiO2@N/P-CNFs composite nanofibers with excellent electrochemical properties may be served as a promising option for advanced anode materials for lithium-ion batteries.

3D-TNAs/N-TiO2 photoanode assisted heterogeneous electro-Fenton with a novel Fe-MOFs@CF cathode for efficient synergetic oxidation of organic contaminants

Photoelectro-catalysis (PEC) and heterogeneous electro-Fenton (HEF) reactions are two frontier research fields for real effluent treatments. In the present work, a synergetic system with integration of both PEC and HEF has been developed for pollutant removal. PEC process with lower external bias results in the efficient separation of photogenerated hole and electrons, which can also modulate the HEF catalytic performance at the counter electrode, and in other cases the active HEF reaction can in turn affect the intrinsic activity of PEC. In this system, three dimensional TiO2 nanotube arrays coupled with nitrogen doped TiO2 nanoparticles (3D-TNAs/N-TiO2) was prepared as photoanode for solar light-driven PEC process while NH2-MIL-101 loaded on carbon felt (Fe-MOFs@CF) have been used as the cathode for HEF reaction. The performances of the synergetic system showed much higher degradation efficiency, which were evaluated by degrading typical organic containments in water (with the best of∼95 % in 5 min with 2*3 cm2 electrode area). The reaction rate in the coupling system were ∼7.25 and 1.18 times higher than single PEC or HEF with a wide pH applied range, well recycled and good stability for further application in water purification.

Interfacial interaction of plasmonic nanoparticles (Ag, Au) decorated floweret TiO2 nanorod hybrids for enhanced visible light driven photocatalytic activity

One dimensional TiO2 nanorods (TONRs) hybrids have enormous potential for photocatalytic applications. Integrating TONRs with plasmonic Nanoparticles (PNPs) to form hybrid structures enhances its photocatalytic activity by local surface plasmonic resonance (LSPR) effect. The Present work reports PNPs decorated TONRs for visible light driven photocatalytic activity. PNPs of silver (Ag) and gold (Au) with different sizes are decorated over TONRs to form PNP-TONRs hybrids. The size of Ag and Au PNPs are engineered by using inert gas evaporation method at different vapour pressures. The microRaman studies of hybrids reveal the enhanced Eg mode due to SERS effect. The decoration of Au PNPs with small size PNPs on TONRs have been found efficacious to alter Schottky effect and plasmonic activity. PNPs-TONRs hybrids are further explored for photocatalytic activity. The overall photocatalytic activity of small sized Au based hybrids is better than Ag based hybrids owing to their better Schottky effect and plasmonic activity.

Three dimensional rosette-rod TiO2/Bi2S3 heterojunction for enhanced photoelectrochemical water splitting

Abstract In this work, we have fabricated a three-dimensional double layered rosette-rod TiO2 heterojunction with Bi2S3 using two-step hydrothermal method and solvothermal route. A seed layer approach is also used to assist uniform distribution of Bi2S3 and to form a perfect heterojunction between TiO2 and Bi2S3. Morphologically studies reveal that the double layered rosette-rod TiO2 (RT) architecture consists of two main parts one dimensional TiO2 nanorod arrays present at the bottom for direct transfer of photo induced electron and hole pairs, while the upper three-dimensional nano rosette consisting of small TiO2 nanorods as building units to enhance the surface area and light harvesting efficiency. Morphology of Bi2S3 also found to be affected relatively by the growth duration and the presence of seed layer. Photoelectrochemical performance at 1.23 V RHE bias-potential under 100 mW cm−2 solar light illumination shows that synthesized RT_Bi2S3 photoanode demonstrates the highest photocurrent density of 3.98 mA cm−2, which is practically 10 times higher than RT (0.39 mA cm−2) and 5.5 times higher than RT_ Bi2S3 photoanode without the seed layer (0.74 mA cm−2). It is remarkable to mention that photocurrent density of RT_ Bi2S3 photoanode to the best of our knowledge is superior to all the TiO2 and Bi2S3 based photoanodes used in photoelectrochemical cells reported in the literature.

TiO2 nanorods integrated with titania nanoparticles: Large specific surface area 1D nanostructures for improved efficiency of dye-sensitized solar cells (DSSCs)

In this work, the impact of alkali concentration on the formation of novel one dimensional TiO2 nanostructures has been studied. The variation of alkali concentration resulted in the change of morphology and structure of P25 nanoparticle precursors under hydrothermal conditions, as confirmed by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) nitrogen adsorption–desorption, X-ray diffraction (XRD) and photoluminescence (PL) spectroscopy. The effects of the annealing temperatures on the surface oxygen vacancies were also studied under various temperatures. In higher NaOH concentrations under annealing, these nanostructures have a peculiar appearance consisting in nanorods with nanoparticles grown on their surface and hence designated herein as “integrated TiO2 nanorods”. The prepared nanostructures were employed as main precursors of photoanode and their performance was fully investigated in dye-sensitized solar cells (DSSCs). TiO2 nanostructures prepared from 12 M alkaline solution at 300 °C had the largest specific surface area (363.15 m2/g) and the best efficiency improvement was about 41% for these TiO2 nanostructures compared to the P25 nanoparticles.

Light induced catalytic and electrochemical enhancement in metal nanoparticles crafted one dimensional TiO2 nanotubes

One-dimensional nanostructures of titanium dioxide (TiO2) pay tremendous attention to photocatalysis. In this context, we present the consequence of bimetallic nanoparticles (Zn-Pd) on electrochemical and photocatalytic properties of TiO2 nanotubes (TiNTs). Bimetallic nanoparticles of Zn-Pd are crafted on TiNTs by photodeposition process at room temperature. The presence of bimetallic nanoparticles (MNPs) decreases the ability of the recollection of the electron-hole pairs and modifies structure of TiNTs. Crafting of Zn-Pd on TiNTs modify the structure of ZnPd-TiNTs as evident by scanning electron microscopy (SEM). The results showed that nanoparticles of Zn-Pd are crafted uniformly over TiNTs. The detailed analysis of TiNTs and ZnPd-TiNTs are investigated via X-ray diffraction (XRD) and raman spectroscopy. Observations reveals intensity of plane increases after crafting of Zn-Pd, showing increased anatase phase crystallinity and crystallite size. In addition, the change in the peak position of ZnPd-TiNTs is due to the crafting of Zn-Pd over TiO2, resulting in a change in the TiO2 structure. The changed structure of TiNT extensively changes the catalytic properties of the hybrids of ZnPd-TiNTs that have been further corroborated by photocatalytic applications. The photocatalytic behavior of ZnPd-TiNT hybrids is found to be significantly higher than TiNTs. The enhancement in photocatalytic activity of ZnPd-TiNTs hybrids is owing to the better charge separation.

Preparation and enhanced photoelectrocatalytic properties of a three-dimensional TiO2-Au porous structure fabricated using superaligned carbon nanotube films

Three dimensional TiO2–Au cross-nanoporous structure (3D TiO2–Au CNS) as an efficient photoelectrocatalytic system was fabricated using superaligned carbon nanotube films as etching masks and electron-beam evaporation. The 3D TiO2–Au CNS exhibited a broad absorption band in the visible region, and the incident photon-to-current conversion efficiency of 3D TiO2–Au CNS/Ti electrode was 3–4 times higher than that of pure TiO2 electrode. The photocurrent density of the 3D TiO2–Au CNS device was 0.079 mA cm−2 at 0 V vs. Ag/AgCl with a solar irradiance of 100 mW cm−2. This developed preparation method was simple, of high flexibility and can be adopted for mass production due to its low cost and good compatibility with other processing technologies. The 3D TiO2–Au CNS and its preparation method have important value in design of photoelectrocatalytic system for research and practical applications, which may have a potential utility in photocatalytic and other photoelectrocatalytic reactions.

0D/2D Co3O4/TiO2 Z-Scheme heterojunction for boosted photocatalytic degradation and mechanism investigation

The development of stable, efficient photocatalyst for environmental antibiotics degradation is great significant and remains a major challenge. Herein, zero dimensional Co3O4 nanodots are grown in situ onto two dimensional TiO2 nanosheets, successfully producing a Z-scheme heterojunction Co3O4/TiO2 photocatalyst for the photocatalytic degradation of enrofloxacin. The synthesized nanohybrid exhibits superior photodegradation performance (0.0269 min−1 for enrofloxacin) and excellent stability (four cycles). The matched energy bands allow the formation of the Z-scheme heterojunction, and the built-in electric field provides the reaction driving force. The formed Z-scheme heterojunction can simultaneously inhibit photoinduced electron-hole recombination, boost photoinduced charge carrier transfer, and produce more active electrons and holes, therefore generating more active species for eventual photocatalytic degradation. In addition, a the possible enrofloxacin degradation pathway was proposed based on simulated calculations and GCMS analysis. This work can inspire further design and construction of Z-scheme heterojunction photocatalysts.

Photoelectrochemical Bioanalyte Sensor Based on Engineered One-Dimensional Nanostructured Oxide

Photoelectrochemical (PEC) non-enzymatic sensing systems are beneficial for the detection of low concentrations of biological molecules. Among different potential nanostructured materials, one dimensional TiO2 and ZnO nanorods are promising semi-conductor which can be successfully applied in many photoelectrochemical applications, mainly due to their photoactive properties, and long-term stability. In spite of their advantages, the wide band gap of 1D TiO2 and ZnO along with their high recombination rate confine their applications dramatically. These properties, prevent 1D TiO2 and ZnO from absorbing visible light; therefore, the semiconductor is only photoactive in the UV range. Here, we describe novel non-enzymatic sunlight-driven PEC sensors based on a modified 1D TiO2 nanorod array with cocatalyst and 1D ZnO core-shell structure for the aim of improved PEC non-enzymatic detection of glucose and H2O2, respectively. The 1D TiO2 and ZnO nanorods array were prepared through facile hydrothermal at and electrodeposition methods, respectively. The modified electrodes were characterized through FESEM, HRTEM, XRD, and UV-vis spectroscopy. The novel 1D TiO2 and 1D ZnO@TiO2 core shell electrodes exhibited enhanced PEC sensing properties with a low limit of detection and a high sensitivity, over a linear range of 0.1 – 1000 nM of glucose and 1 pM-100 mM of H2O2 in PBS. Additionally, the sensor displayed high selectivity, high stability, and high reproducibility. Overall, our engineered PEC sensor demonstrated ultrasensitive detection of glucose and H2O2 and a capable platform for continued development into the field of PEC non-enzymatic sensors.

Ultrafine Cu2ZnSnS4 quantum dots functionalized TiO2 nanotube arrays for potential optoelectronic applications

Tremendous progress has been made in power conversion efficiency (PCE) of thin-film photovoltaics over the past few years, yet most current high-efficient photoactive layer usually contains rare or toxic elements accompanied by expensive and complicated vacuum processes, which increases the cost and limits the scope of the applications in the long run. Here we present a synergistic effect of quantum effect of an earth-abundant and low toxic ultrafine Cu2ZnSnS4 (CZTS) quantum dots (QDs) and low charge recombination in one dimensional TiO2 nanotube arrays for optoelectronic devices. By ligands exchange, the as-obtained ultrafine CZTS QDs have been robustly anchored to a highly ordered TiO2 nanotube arrays (TNAs) to be served as a function layer in a simple QDs sensitized solar cells. Such ultrafine CZTS QDs based solar cells exhibit significant enhancement up to 457% in PCE compared to that of CZTS QDs with larger size. The CZTS QDs functionalized TNAs has also shown excellent charge transport capability with lower recombination rate than QDs sensitized TiO2 nanoparticles and it is expected to be used as a low-cost environment-friendly function layer for various potential optoelectronic applications.

Shape Tailored TiO₂ Nanostructures and Their Hybrids for Advanced Energy and Environmental Applications: A Review.

Shape tailored TiO₂ nanostructures with various dimensionality (zero to three dimension) have unique physicochemical and functional properties that facilitates its efficient energy and environment applications, e.g., solar light driven photocatalytic hydrogen generation and decontamination of organic/inorganic toxic pollutants, CO₂ reduction into the hydrocarbon fuels, solar cells, supercapacitors and lithium-ion batteries etc. However, the wide band gap nature and the fast recombination of the photogenerated charge carriers in TiO₂ usually limit its overall performance under solar light illumination. In this review, we present a state of the art on the fabrication techniques of shape tailored TiO₂ nanostructures and the strategies employed to make the system catalytically more efficient. Though shape tailored TiO₂ nanostructures with large specific surface area and highly energetic (001) facet exposed TiO₂ nanostructures (2D and 3D) can enhance the photocatalytic efficiency to a reasonable extent, further surface engineering is needed for the modification of the electronic band arrangement, visible light sensitization and efficient charge separation. Herein, TiO₂ heterostructures (HSs) with metal/non-metal doping, surface fluorination, plasmonic noble metal nanoparticles (NPs) and coupling with the narrow band gap suitable semiconductor (type-II) are discussed in details covering from zero dimensional to three dimensional heterostructures. The synthesis strategies, charge transfer mechanism and their participation in the photocatalysis are elaborated. Though one dimensional TiO₂ HSs have been widely studied, we present the recent development of critical surface engineering strategies of two and three dimensional systems, which give rise to the excellent properties including the enlargement of surface area, light absorption capability and efficient separation of electrons/holes resulting in the superior performance in advanced applications. Based on recent breakthroughs in the field, future directions and outlook of the field are presented at the end.

The fabrication, surface modification of TiO<sub>2</sub> nanorod arrays and their application in perovskite solar cells

One dimensional TiO2 nanoarrays have attracted widely attention as electron transport materials in solar cells due to their direct electron transport route. In this paper, rutile TiO2 nanorod arrays were prepared by hydrothermal method and served as electron transport scaffold in organic-inorganic hybrid perovskite solar cells. The influence of introducing TiO2 compact layer on hydrothermal growth TiO2 nanorod arrays and photovoltaic performance of assembled soar cells was studied. The influences of nanorod length and TiCl4 treatment on microstructure of nanoarrays as well as photovoltaic performance of assembled soar cells were investigated. It was found that the introducing of TiO2 compact layer could induce growing ordered TiO2 nanorod arrays perpendicular to the substrate. An optimum TiO2 nanorod length is benefit to the rapid separation and transport of photo-excited carriers. The TiCl4 treatment of TiO2 nanorod arrays enhances the aspect-ratio of nanorod arrays and is accordingly possible to load more perovskite crystals and adsorb more light energy. Furthermore, the resulted nanoparticles from TiCl4 treatment could eliminate the cracks between perovskite crystal and TiO2 scaffold, and hence improve the interface and reduce the charge recombination, resulting in a higher photovoltaic performance. The optimum power conversion efficiency (PCE) of 15.11% was obtained in solar cell assembled with TiO2 nanorod arrays treated by 0.1 mol/L TiCl4 solution.

Synthesis and Characterization Hierarchical Three-Dimensional TiO2 Structure via Hydrothermal Method

TiO2 is one of the most potential candidates due to its fascinating properties for multi-discipline fields. One dimensional nanostructure TiO2 such as nanotube and nanorods has been widely used for many devices technology. Compare with one-dimensional nanostructure TiO2; the hierarchical TiO2 has not been widely applied. Three dimensional TiO2 play a promising role for application in many different fields such as photovoltaics, photocatalytic and a gas sensor. Herein, we report that the hierarchically structures TiO2 have been successfully obtained by the one-pot Hydrothermal process. The growth mechanism of Titania was controlled by Titanium (IV) isopropoxide (TTIP). Ethylene glycol (EG). Hydrochloric acid (HCl). Hexadecyltrimethylammonium bromide (CTAB) molar ratio. TTIP was used as titanium source and CTAB as a soft template. The molar ratio of TTIP. EG. HCl. CTAB was 0.1:0.2:0.4:0.001. Those samples were synthesized using the hydrothermal method at 180 °C for 20 h. The purpose of this work was focused on investigating morphology, crystallite size, crystalline phase, and particle size. The properties of these materials were characterized by XRay Diffraction, Energy Dispersive Spectroscopy and Scanning Electron Microscope. It was found all particles exhibited unique spherical morphology which arranged by nanorods and good distribution nanoparticle. The Average size of the sphere has range 1 µm to 3 µm with diameter nanorods 60 nm to 100 nm. The TiO2 spheres were constructed of interconnected nanorods and formed a three dimensional (3D) porous framework. XRD analysis confirmed that sample consisted of pure rutile crystal structure with crystallite size was 50 nm, and EDS revealed an elemental content of Ti 61.03 % and O 38.97 %.

Rice spike-like g-C3N4/TiO2 heterojunctions with tight-binding interface by using sodium titanate ultralong nanotube as precursor and template

A novel rice spike-like g-C3N4/TiO2 nanowire heterojunctions are fabricated by hydrothermal treating Na2Ti3O7 ultralong nanotubes in the presence of g-C3N4. The presence of g-C3N4 promotes the hydrolysis of Na2Ti3O7 ultralong nanotubes. The partially replaced O of TiO2 by N from g-C3N4 leads to the formation of a tight-binding interface between one dimensional TiO2 and two dimensional g-C3N4, which is crucial for fast and effective transfer of photogenerated electrons in heterostructured photocatalysts. As a result, the g-C3N4/TiO2 nanowire heterojunctions exhibit excellent visible-light photocatalytic activity. The kinetic constant (k) of g-C3N4/TiO2 (0.024 min−1) for degradation of methylene blue under visible light irradiation is 1.85 and 4 times than that of pure g-C3N4 and P25, respectively.

Double-Wall TiO2 Nanotubes for Dye-Sensitized Solar Cells: A Study of Growth Mechanism

One–dimensional TiO2 nanotubes (TNTs) are promising semiconductor photoanodes for dye–sensitized solar cells (DSSCs) due to their rapid electron transportation property, however, the lack of high surface area restricts their application. Double–wall TiO2 nanotubes (DWTNTs) were synthesized to compensate for the smaller surface area of single–wall TiO2 nanotubes (SWTNTs) and the comprehensive growth mechanism of DWTNTs is clearly demonstrated in this study. The evolution of pores and pits in three dimensions causes the formation of DWTNTs. After optimizing the thickness of DWTNTs, the DSSC with DWTNTs on the flexible Ti substrate showed a higher power conversion efficiency (η) of 6.90 ± 0.10%, as compared to that of the cell with SWTNTs (4.66 ± 0.15%), owing to a significant increase in the short–circuit photocurrent density caused by the higher surface area for dye adsorption for the former case. Electrochemical impedance spectroscopy, incident photon–to–electron conversion efficiency curves, and UV–vis a...

Bioactivation of titanium dioxide scaffolds by ALP-functionalization

Three dimensional TiO2 scaffolds are receiving renewed attention for bone tissue engineering (TE) due to their biocompatibility and attractive mechanical properties. However the bioactivity of these scaffolds is comparatively lower than that of bioactive glass or hydroxyapatite (HA) scaffolds. One strategy to improve bioactivity is to functionalize the surface of the scaffolds using biomolecules. Alkaline phosphatase (ALP) was chosen in this study due to its important role in the bone mineralization process. The current study investigated the ALP functionalization of 3D titanium dioxide scaffolds using self-polymerization of dopamine. Robust titanium scaffolds (compressive strength∼2.7 ± 0.3 MPa) were produced via foam replica method. Enzyme grafting was performed by dip-coating in polydopamine/ALP solution. The presence of ALP was indirectly confirmed by contact angle measurements and enzymatic activity study. The influence of the enzyme on the bioactivity, e.g. hydroxyapatite formation on the scaffold surface, was measured in simulated body fluid (SBF). After 28 days in SBF, 5 mg ALP coated titania scaffolds exhibited increased hydroxyapatite formation. It was thus confirmed that ALP enhances the bioactivity of titania scaffolds, converting an inert bioceramic in an attractive bioactive system for bone TE.

Effect of Na doping on structure, morphology and properties of hydrothermally grown one dimensional TiO2 nanorod structures

Na doped TiO2 nanorod structures have been prepared by one-step hydrothermal method. Structural analysis of undoped and doped TiO2 nanorod samples revealed the formation of single rutile phase structure. XRD plots confirms the effective substitution of Ti4+ with Na+ in the samples by exhibiting a slight shift towards the lower angle in the 2θ value of the diffraction peaks compared to undoped TiO2 sample. The distribution of sodium in TiO2 lattice is confirmed by morphological and EDS analysis. FESEM images of doped samples revealed the formation of structures in the form of nanorods for 2 and 4% of dopant and then to nanoflowers on increasing the amount of dopant to 6%. TEM analysis revealed the formation of nanorods with a diameter about 250 nm. Each nanorod was found to be formed of individual thin nanorods with approx diameter of 25 nm. The presence of sodium (atomic% = 7.60) in the nanorods was also substantiated by EDS studies. From optical studies, with increase in dopant concentration, the absorption edge is seen to be shifted towards the longer wavelength and bandgap tends to show red shift with values varying from 3.0 to 2.74 eV.

Highly efficient photocatalytic H2 evolution over MoS2/CdS-TiO2 nanofibers prepared by an electrospinning mediated photodeposition method

MoS2/CdS-TiO2 nanofibers have been successfully prepared by an electrospinning mediated photodeposition method for improving the interfacial contact between MoS2 and CdS-TiO2 nanofibers. The structural features, morphologies, and photo-absorption performances of the as-prepared samples were investigated in detail. The photocatalytic activity of a typical sample 1%MoS2/CdS-TiO2(60) nanofibers for H2 evolution under visible light irradiation exhibits 3.0 and 4.0 times higher than that of 1%MoS2/CdS-P25(60) and 1%Pt/CdS-TiO2(60), respectively. Based on the above results, it reveals that one dimensional TiO2 nanofibers can serve as excellent substrates for improving the dispersion of CdS and MoS2. Moreover, the intimate interaction among MoS2, CdS and TiO2 may be suggested by HRTEM images and elements mapping patterns. Further photoelectrochemical analyses show that the effective separation of photogenerated carriers can be markedly accelerated. Finally, a tentative photocatalytic reaction mechanism has also been investigated. This work demonstrates that the method of combining electrospinning and photodeposition is feasible for the preparation of an effective MoS2/CdS-TiO2 nanofibers composite photocatalyst.

Effects of TiO2 content on the microstructure, mechanical properties and photocatalytic activity of three dimensional TiO2–Graphene composite prepared by hydrothermal reaction

A series of three dimensional (3D) porous TiO2–graphene (TGR) hydrogel samples with different mass ratio of graphene to TiO2 were obtained using a one-step hydrothermal method. Their microstructure, mechanical properties, and photocatalytic activity were investigated. The TGR samples exhibited well defined interconnected 3D porous network microstructure and good mechanical strength. Moreover, the pore size and the compressive strength could be easily adjusted by changing the content of TiO2, showing a decreasing tendency with the increase of the relative content of TiO2. The results of the photodegradation of methylene blue indicated that the photocatalytic activity of the TGR samples can be significantly enhanced, compared to the pure TiO2 nanoparticles. The TGR sample also showed good durability and reusability. The mechanisms resulting in the improvement of photocatalytic activity were investigated with DRS, PL spectra, and adsorption experiment under dark conditions. It was found that adsorption is the dominant factor for the enhanced photocatalytic activity.

Synergistic effect of nanocavities in anatase TiO2 nanobelts for photocatalytic degradation of methyl orange dye in aqueous solution

Nanocavities are empty voids exposed on the surface of one dimensional TiO2 nanostructured material. Often, they exhibited beneficial optical and electrical properties that leads to efficient photocatalytic reactions. This study reports formation of nanocavities on anatase TiO2 nanobelts (TNB) through dehydroxylation of surface hydroxyl groups during calcination process (350–600°C). The morphological and crystal structure analysis of TNB-500, -550 and -600 displayed the nanobelts shape with high density of nano-size cavities and increase in average diameter with calcination temperature. The SAED patterns confirm the anatase TiO2 phase. The enhanced light absorption properties of biphasic anatase/TiO2-B and anatase TiO2 than H2Ti3O7 are attributed to transformation of crystal structure upon calcination process. The catalytic activity was evaluated for degradation of methyl orange dye in aqueous solution under solar light irradiation. The reaction variables such as calcination temperature, amount of catalyst and pH of the methyl orange dye solution were studied and discussed in detail. Under optimal experimental conditions TNB-550 photocatalyst displayed highest degradation performance about 8 folds higher than H2Ti3O7. The high performance is explained as due to synergistic properties of one dimensional anatase TiO2 with high density of nanocavities leading to one dimensional transfer of electrons and high absorption co-efficient in UV-A spectrum are suitable for efficient red-ox reactions.